Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. _codec-controls: *********************** Codec Control Reference *********************** Below all controls within the Codec control class are described. First the generic controls, then controls specific for certain hardware. .. note:: These controls are applicable to all codecs and not just MPEG. The defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls were originally made for MPEG codecs and later extended to cover all encoding formats. Generic Codec Controls ====================== .. _mpeg-control-id: Codec Control IDs ----------------- ``V4L2_CID_CODEC_CLASS (class)`` The Codec class descriptor. Calling :ref:`VIDIOC_QUERYCTRL` for this control will return a description of this control class. This description can be used as the caption of a Tab page in a GUI, for example. .. _v4l2-mpeg-stream-type: ``V4L2_CID_MPEG_STREAM_TYPE`` (enum) enum v4l2_mpeg_stream_type - The MPEG-1, -2 or -4 output stream type. One cannot assume anything here. Each hardware MPEG encoder tends to support different subsets of the available MPEG stream types. This control is specific to multiplexed MPEG streams. The currently defined stream types are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS`` - MPEG-2 program stream * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS`` - MPEG-2 transport stream * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS`` - MPEG-1 system stream * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD`` - MPEG-2 DVD-compatible stream * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD`` - MPEG-1 VCD-compatible stream * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD`` - MPEG-2 SVCD-compatible stream ``V4L2_CID_MPEG_STREAM_PID_PMT (integer)`` Program Map Table Packet ID for the MPEG transport stream (default 16) ``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)`` Audio Packet ID for the MPEG transport stream (default 256) ``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)`` Video Packet ID for the MPEG transport stream (default 260) ``V4L2_CID_MPEG_STREAM_PID_PCR (integer)`` Packet ID for the MPEG transport stream carrying PCR fields (default 259) ``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)`` Audio ID for MPEG PES ``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)`` Video ID for MPEG PES .. _v4l2-mpeg-stream-vbi-fmt: ``V4L2_CID_MPEG_STREAM_VBI_FMT`` (enum) enum v4l2_mpeg_stream_vbi_fmt - Some cards can embed VBI data (e. g. Closed Caption, Teletext) into the MPEG stream. This control selects whether VBI data should be embedded, and if so, what embedding method should be used. The list of possible VBI formats depends on the driver. The currently defined VBI format types are: .. tabularcolumns:: |p{6.6 cm}|p{10.9cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_STREAM_VBI_FMT_NONE`` - No VBI in the MPEG stream * - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV`` - VBI in private packets, IVTV format (documented in the kernel sources in the file ``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``) .. _v4l2-mpeg-audio-sampling-freq: ``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ`` (enum) enum v4l2_mpeg_audio_sampling_freq - MPEG Audio sampling frequency. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100`` - 44.1 kHz * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000`` - 48 kHz * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000`` - 32 kHz .. _v4l2-mpeg-audio-encoding: ``V4L2_CID_MPEG_AUDIO_ENCODING`` (enum) enum v4l2_mpeg_audio_encoding - MPEG Audio encoding. This control is specific to multiplexed MPEG streams. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1`` - MPEG-1/2 Layer I encoding * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2`` - MPEG-1/2 Layer II encoding * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3`` - MPEG-1/2 Layer III encoding * - ``V4L2_MPEG_AUDIO_ENCODING_AAC`` - MPEG-2/4 AAC (Advanced Audio Coding) * - ``V4L2_MPEG_AUDIO_ENCODING_AC3`` - AC-3 aka ATSC A/52 encoding .. _v4l2-mpeg-audio-l1-bitrate: ``V4L2_CID_MPEG_AUDIO_L1_BITRATE`` (enum) enum v4l2_mpeg_audio_l1_bitrate - MPEG-1/2 Layer I bitrate. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K`` - 32 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K`` - 64 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K`` - 96 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K`` - 128 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K`` - 160 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K`` - 192 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K`` - 224 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K`` - 256 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K`` - 288 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K`` - 320 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K`` - 352 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K`` - 384 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K`` - 416 kbit/s * - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K`` - 448 kbit/s .. _v4l2-mpeg-audio-l2-bitrate: ``V4L2_CID_MPEG_AUDIO_L2_BITRATE`` (enum) enum v4l2_mpeg_audio_l2_bitrate - MPEG-1/2 Layer II bitrate. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K`` - 32 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K`` - 48 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K`` - 56 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K`` - 64 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K`` - 80 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K`` - 96 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K`` - 112 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K`` - 128 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K`` - 160 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K`` - 192 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K`` - 224 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K`` - 256 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K`` - 320 kbit/s * - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K`` - 384 kbit/s .. _v4l2-mpeg-audio-l3-bitrate: ``V4L2_CID_MPEG_AUDIO_L3_BITRATE`` (enum) enum v4l2_mpeg_audio_l3_bitrate - MPEG-1/2 Layer III bitrate. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K`` - 32 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K`` - 40 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K`` - 48 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K`` - 56 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K`` - 64 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K`` - 80 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K`` - 96 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K`` - 112 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K`` - 128 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K`` - 160 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K`` - 192 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K`` - 224 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K`` - 256 kbit/s * - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K`` - 320 kbit/s ``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)`` AAC bitrate in bits per second. .. _v4l2-mpeg-audio-ac3-bitrate: ``V4L2_CID_MPEG_AUDIO_AC3_BITRATE`` (enum) enum v4l2_mpeg_audio_ac3_bitrate - AC-3 bitrate. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K`` - 32 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K`` - 40 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K`` - 48 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K`` - 56 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K`` - 64 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K`` - 80 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K`` - 96 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K`` - 112 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K`` - 128 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K`` - 160 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K`` - 192 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K`` - 224 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K`` - 256 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K`` - 320 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K`` - 384 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K`` - 448 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K`` - 512 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K`` - 576 kbit/s * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K`` - 640 kbit/s .. _v4l2-mpeg-audio-mode: ``V4L2_CID_MPEG_AUDIO_MODE`` (enum) enum v4l2_mpeg_audio_mode - MPEG Audio mode. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_MODE_STEREO`` - Stereo * - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO`` - Joint Stereo * - ``V4L2_MPEG_AUDIO_MODE_DUAL`` - Bilingual * - ``V4L2_MPEG_AUDIO_MODE_MONO`` - Mono .. _v4l2-mpeg-audio-mode-extension: ``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION`` (enum) enum v4l2_mpeg_audio_mode_extension - Joint Stereo audio mode extension. In Layer I and II they indicate which subbands are in intensity stereo. All other subbands are coded in stereo. Layer III is not (yet) supported. Possible values are: .. tabularcolumns:: |p{9.1cm}|p{8.4cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4`` - Subbands 4-31 in intensity stereo * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8`` - Subbands 8-31 in intensity stereo * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12`` - Subbands 12-31 in intensity stereo * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16`` - Subbands 16-31 in intensity stereo .. _v4l2-mpeg-audio-emphasis: ``V4L2_CID_MPEG_AUDIO_EMPHASIS`` (enum) enum v4l2_mpeg_audio_emphasis - Audio Emphasis. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE`` - None * - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS`` - 50/15 microsecond emphasis * - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17`` - CCITT J.17 .. _v4l2-mpeg-audio-crc: ``V4L2_CID_MPEG_AUDIO_CRC`` (enum) enum v4l2_mpeg_audio_crc - CRC method. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_CRC_NONE`` - None * - ``V4L2_MPEG_AUDIO_CRC_CRC16`` - 16 bit parity check ``V4L2_CID_MPEG_AUDIO_MUTE (boolean)`` Mutes the audio when capturing. This is not done by muting audio hardware, which can still produce a slight hiss, but in the encoder itself, guaranteeing a fixed and reproducible audio bitstream. 0 = unmuted, 1 = muted. .. _v4l2-mpeg-audio-dec-playback: ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` (enum) enum v4l2_mpeg_audio_dec_playback - Determines how monolingual audio should be played back. Possible values are: .. tabularcolumns:: |p{9.8cm}|p{7.7cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO`` - Automatically determines the best playback mode. * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO`` - Stereo playback. * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT`` - Left channel playback. * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT`` - Right channel playback. * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO`` - Mono playback. * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO`` - Stereo playback with swapped left and right channels. .. _v4l2-mpeg-audio-dec-multilingual-playback: ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` (enum) enum v4l2_mpeg_audio_dec_playback - Determines how multilingual audio should be played back. .. _v4l2-mpeg-video-encoding: ``V4L2_CID_MPEG_VIDEO_ENCODING`` (enum) enum v4l2_mpeg_video_encoding - MPEG Video encoding method. This control is specific to multiplexed MPEG streams. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1`` - MPEG-1 Video encoding * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2`` - MPEG-2 Video encoding * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC`` - MPEG-4 AVC (H.264) Video encoding .. _v4l2-mpeg-video-aspect: ``V4L2_CID_MPEG_VIDEO_ASPECT`` (enum) enum v4l2_mpeg_video_aspect - Video aspect. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_ASPECT_1x1`` * - ``V4L2_MPEG_VIDEO_ASPECT_4x3`` * - ``V4L2_MPEG_VIDEO_ASPECT_16x9`` * - ``V4L2_MPEG_VIDEO_ASPECT_221x100`` ``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)`` Number of B-Frames (default 2) ``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)`` GOP size (default 12) ``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)`` GOP closure (default 1) ``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)`` Enable 3:2 pulldown (default 0) .. _v4l2-mpeg-video-bitrate-mode: ``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` (enum) enum v4l2_mpeg_video_bitrate_mode - Video bitrate mode. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR`` - Variable bitrate * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR`` - Constant bitrate * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ`` - Constant quality ``V4L2_CID_MPEG_VIDEO_BITRATE (integer)`` Average video bitrate in bits per second. ``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)`` Peak video bitrate in bits per second. Must be larger or equal to the average video bitrate. It is ignored if the video bitrate mode is set to constant bitrate. ``V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY (integer)`` Constant quality level control. This control is applicable when ``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` value is ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``. Valid range is 1 to 100 where 1 indicates lowest quality and 100 indicates highest quality. Encoder will decide the appropriate quantization parameter and bitrate to produce requested frame quality. ``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (enum)`` enum v4l2_mpeg_video_frame_skip_mode - Indicates in what conditions the encoder should skip frames. If encoding a frame would cause the encoded stream to be larger then a chosen data limit then the frame will be skipped. Possible values are: .. tabularcolumns:: |p{8.2cm}|p{9.3cm}| .. raw:: latex \small .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_DISABLED`` - Frame skip mode is disabled. * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT`` - Frame skip mode enabled and buffer limit is set by the chosen level and is defined by the standard. * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT`` - Frame skip mode enabled and buffer limit is set by the :ref:`VBV (MPEG1/2/4) <v4l2-mpeg-video-vbv-size>` or :ref:`CPB (H264) buffer size <v4l2-mpeg-video-h264-cpb-size>` control. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)`` For every captured frame, skip this many subsequent frames (default 0). ``V4L2_CID_MPEG_VIDEO_MUTE (boolean)`` "Mutes" the video to a fixed color when capturing. This is useful for testing, to produce a fixed video bitstream. 0 = unmuted, 1 = muted. ``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)`` Sets the "mute" color of the video. The supplied 32-bit integer is interpreted as follows (bit 0 = least significant bit): .. flat-table:: :header-rows: 0 :stub-columns: 0 * - Bit 0:7 - V chrominance information * - Bit 8:15 - U chrominance information * - Bit 16:23 - Y luminance information * - Bit 24:31 - Must be zero. .. _v4l2-mpeg-video-dec-pts: ``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)`` This read-only control returns the 33-bit video Presentation Time Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the currently displayed frame. This is the same PTS as is used in :ref:`VIDIOC_DECODER_CMD`. .. _v4l2-mpeg-video-dec-frame: ``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)`` This read-only control returns the frame counter of the frame that is currently displayed (decoded). This value is reset to 0 whenever the decoder is started. ``V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (integer64)`` This control sets the conceal color in YUV color space. It describes the client preference of the error conceal color in case of an error where the reference frame is missing. The decoder should fill the reference buffer with the preferred color and use it for future decoding. The control is using 16 bits per channel. Applicable to decoders. .. flat-table:: :header-rows: 0 :stub-columns: 0 * - - 8bit format - 10bit format - 12bit format * - Y luminance - Bit 0:7 - Bit 0:9 - Bit 0:11 * - Cb chrominance - Bit 16:23 - Bit 16:25 - Bit 16:27 * - Cr chrominance - Bit 32:39 - Bit 32:41 - Bit 32:43 * - Must be zero - Bit 48:63 - Bit 48:63 - Bit 48:63 ``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)`` If enabled the decoder expects to receive a single slice per buffer, otherwise the decoder expects a single frame in per buffer. Applicable to the decoder, all codecs. ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE (boolean)`` If the display delay is enabled then the decoder is forced to return a CAPTURE buffer (decoded frame) after processing a certain number of OUTPUT buffers. The delay can be set through ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY``. This feature can be used for example for generating thumbnails of videos. Applicable to the decoder. ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY (integer)`` Display delay value for decoder. The decoder is forced to return a decoded frame after the set 'display delay' number of frames. If this number is low it may result in frames returned out of display order, in addition the hardware may still be using the returned buffer as a reference picture for subsequent frames. ``V4L2_CID_MPEG_VIDEO_AU_DELIMITER (boolean)`` If enabled then, AUD (Access Unit Delimiter) NALUs will be generated. That could be useful to find the start of a frame without having to fully parse each NALU. Applicable to the H264 and HEVC encoders. ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)`` Enable writing sample aspect ratio in the Video Usability Information. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-vui-sar-idc: ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC`` (enum) enum v4l2_mpeg_video_h264_vui_sar_idc - VUI sample aspect ratio indicator for H.264 encoding. The value is defined in the table E-1 in the standard. Applicable to the H264 encoder. .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED`` - Unspecified * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1`` - 1x1 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11`` - 12x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11`` - 10x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11`` - 16x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33`` - 40x33 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11`` - 24x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11`` - 20x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11`` - 32x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33`` - 80x33 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11`` - 18x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11`` - 15x11 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33`` - 64x33 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99`` - 160x99 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3`` - 4x3 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2`` - 3x2 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1`` - 2x1 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED`` - Extended SAR ``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)`` Extended sample aspect ratio width for H.264 VUI encoding. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)`` Extended sample aspect ratio height for H.264 VUI encoding. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-level: ``V4L2_CID_MPEG_VIDEO_H264_LEVEL`` (enum) enum v4l2_mpeg_video_h264_level - The level information for the H264 video elementary stream. Applicable to the H264 encoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0`` - Level 1.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B`` - Level 1B * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1`` - Level 1.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2`` - Level 1.2 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3`` - Level 1.3 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0`` - Level 2.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1`` - Level 2.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2`` - Level 2.2 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0`` - Level 3.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1`` - Level 3.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2`` - Level 3.2 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0`` - Level 4.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1`` - Level 4.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2`` - Level 4.2 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0`` - Level 5.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1`` - Level 5.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_2`` - Level 5.2 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_0`` - Level 6.0 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_1`` - Level 6.1 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_2`` - Level 6.2 .. _v4l2-mpeg-video-mpeg2-level: ``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL`` (enum) enum v4l2_mpeg_video_mpeg2_level - The level information for the MPEG2 elementary stream. Applicable to MPEG2 codecs. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW`` - Low Level (LL) * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN`` - Main Level (ML) * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440`` - High-1440 Level (H-14) * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH`` - High Level (HL) .. _v4l2-mpeg-video-mpeg4-level: ``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL`` (enum) enum v4l2_mpeg_video_mpeg4_level - The level information for the MPEG4 elementary stream. Applicable to the MPEG4 encoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0`` - Level 0 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B`` - Level 0b * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1`` - Level 1 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2`` - Level 2 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3`` - Level 3 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B`` - Level 3b * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4`` - Level 4 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5`` - Level 5 .. _v4l2-mpeg-video-h264-profile: ``V4L2_CID_MPEG_VIDEO_H264_PROFILE`` (enum) enum v4l2_mpeg_video_h264_profile - The profile information for H264. Applicable to the H264 encoder. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{10.2cm}|p{7.3cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE`` - Baseline profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE`` - Constrained Baseline profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN`` - Main profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED`` - Extended profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH`` - High profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10`` - High 10 profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422`` - High 422 profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE`` - High 444 Predictive profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA`` - High 10 Intra profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA`` - High 422 Intra profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA`` - High 444 Intra profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA`` - CAVLC 444 Intra profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE`` - Scalable Baseline profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH`` - Scalable High profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA`` - Scalable High Intra profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH`` - Stereo High profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH`` - Multiview High profile * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_HIGH`` - Constrained High profile .. raw:: latex \normalsize .. _v4l2-mpeg-video-mpeg2-profile: ``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE`` (enum) enum v4l2_mpeg_video_mpeg2_profile - The profile information for MPEG2. Applicable to MPEG2 codecs. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{10.2cm}|p{7.3cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE`` - Simple profile (SP) * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN`` - Main profile (MP) * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE`` - SNR Scalable profile (SNR) * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE`` - Spatially Scalable profile (Spt) * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH`` - High profile (HP) * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW`` - Multi-view profile (MVP) .. raw:: latex \normalsize .. _v4l2-mpeg-video-mpeg4-profile: ``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE`` (enum) enum v4l2_mpeg_video_mpeg4_profile - The profile information for MPEG4. Applicable to the MPEG4 encoder. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{11.8cm}|p{5.7cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE`` - Simple profile * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE`` - Advanced Simple profile * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE`` - Core profile * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE`` - Simple Scalable profile * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY`` - Advanced Coding Efficiency profile .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)`` The maximum number of reference pictures used for encoding. Applicable to the encoder. .. _v4l2-mpeg-video-multi-slice-mode: ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` (enum) enum v4l2_mpeg_video_multi_slice_mode - Determines how the encoder should handle division of frame into slices. Applicable to the encoder. Possible values are: .. tabularcolumns:: |p{9.6cm}|p{7.9cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE`` - Single slice per frame. * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB`` - Multiple slices with set maximum number of macroblocks per slice. * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES`` - Multiple slice with set maximum size in bytes per slice. ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)`` The maximum number of macroblocks in a slice. Used when ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the encoder. ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)`` The maximum size of a slice in bytes. Used when ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the encoder. .. _v4l2-mpeg-video-h264-loop-filter-mode: ``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE`` (enum) enum v4l2_mpeg_video_h264_loop_filter_mode - Loop filter mode for H264 encoder. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{13.5cm}|p{4.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED`` - Loop filter is enabled. * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED`` - Loop filter is disabled. * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` - Loop filter is disabled at the slice boundary. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)`` Loop filter alpha coefficient, defined in the H264 standard. This value corresponds to the slice_alpha_c0_offset_div2 slice header field, and should be in the range of -6 to +6, inclusive. The actual alpha offset FilterOffsetA is twice this value. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)`` Loop filter beta coefficient, defined in the H264 standard. This corresponds to the slice_beta_offset_div2 slice header field, and should be in the range of -6 to +6, inclusive. The actual beta offset FilterOffsetB is twice this value. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-entropy-mode: ``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE`` (enum) enum v4l2_mpeg_video_h264_entropy_mode - Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264 encoder. Possible values are: .. tabularcolumns:: |p{9.0cm}|p{8.5cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC`` - Use CAVLC entropy coding. * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC`` - Use CABAC entropy coding. ``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)`` Enable 8X8 transform for H264. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)`` Enable constrained intra prediction for H264. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)`` Specify the offset that should be added to the luma quantization parameter to determine the chroma quantization parameter. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)`` Cyclic intra macroblock refresh. This is the number of continuous macroblocks refreshed every frame. Each frame a successive set of macroblocks is refreshed until the cycle completes and starts from the top of the frame. Setting this control to zero means that macroblocks will not be refreshed. Note that this control will not take effect when ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD`` control is set to non zero value. Applicable to H264, H263 and MPEG4 encoder. ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE (enum)`` enum v4l2_mpeg_video_intra_refresh_period_type - Sets the type of intra refresh. The period to refresh the whole frame is specified by V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD. Note that if this control is not present, then it is undefined what refresh type is used and it is up to the driver to decide. Applicable to H264 and HEVC encoders. Possible values are: .. tabularcolumns:: |p{9.6cm}|p{7.9cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE_RANDOM`` - The whole frame is completely refreshed randomly after the specified period. * - ``V4L2_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE_CYCLIC`` - The whole frame MBs are completely refreshed in cyclic order after the specified period. ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD (integer)`` Intra macroblock refresh period. This sets the period to refresh the whole frame. In other words, this defines the number of frames for which the whole frame will be intra-refreshed. An example: setting period to 1 means that the whole frame will be refreshed, setting period to 2 means that the half of macroblocks will be intra-refreshed on frameX and the other half of macroblocks will be refreshed in frameX + 1 and so on. Setting the period to zero means no period is specified. Note that if the client sets this control to non zero value the ``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB`` control shall be ignored. Applicable to H264 and HEVC encoders. ``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)`` Frame level rate control enable. If this control is disabled then the quantization parameter for each frame type is constant and set with appropriate controls (e.g. ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is enabled then quantization parameter is adjusted to meet the chosen bitrate. Minimum and maximum value for the quantization parameter can be set with appropriate controls (e.g. ``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders. ``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)`` Macroblock level rate control enable. Applicable to the MPEG4 and H264 encoders. ``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)`` Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4 encoder. ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)`` Quantization parameter for an I frame for H263. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)`` Minimum quantization parameter for H263. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)`` Maximum quantization parameter for H263. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)`` Quantization parameter for an P frame for H263. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)`` Quantization parameter for an B frame for H263. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)`` Quantization parameter for an I frame for H264. Valid range: from 0 to 51. ``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)`` Minimum quantization parameter for H264. Valid range: from 0 to 51. ``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)`` Maximum quantization parameter for H264. Valid range: from 0 to 51. ``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)`` Quantization parameter for an P frame for H264. Valid range: from 0 to 51. ``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)`` Quantization parameter for an B frame for H264. Valid range: from 0 to 51. ``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the H264 I frame to limit I frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the H264 I frame to limit I frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the H264 P frame to limit P frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the H264 P frame to limit P frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the H264 B frame to limit B frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the H264 B frame to limit B frame quality to a range. Valid range: from 0 to 51. If V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)`` Quantization parameter for an I frame for MPEG4. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)`` Minimum quantization parameter for MPEG4. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)`` Maximum quantization parameter for MPEG4. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)`` Quantization parameter for an P frame for MPEG4. Valid range: from 1 to 31. ``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)`` Quantization parameter for an B frame for MPEG4. Valid range: from 1 to 31. .. _v4l2-mpeg-video-vbv-size: ``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)`` The Video Buffer Verifier size in kilobytes, it is used as a limitation of frame skip. The VBV is defined in the standard as a mean to verify that the produced stream will be successfully decoded. The standard describes it as "Part of a hypothetical decoder that is conceptually connected to the output of the encoder. Its purpose is to provide a constraint on the variability of the data rate that an encoder or editing process may produce.". Applicable to the MPEG1, MPEG2, MPEG4 encoders. .. _v4l2-mpeg-video-vbv-delay: ``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)`` Sets the initial delay in milliseconds for VBV buffer control. .. _v4l2-mpeg-video-hor-search-range: ``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)`` Horizontal search range defines maximum horizontal search area in pixels to search and match for the present Macroblock (MB) in the reference picture. This V4L2 control macro is used to set horizontal search range for motion estimation module in video encoder. .. _v4l2-mpeg-video-vert-search-range: ``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)`` Vertical search range defines maximum vertical search area in pixels to search and match for the present Macroblock (MB) in the reference picture. This V4L2 control macro is used to set vertical search range for motion estimation module in video encoder. .. _v4l2-mpeg-video-force-key-frame: ``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)`` Force a key frame for the next queued buffer. Applicable to encoders. This is a general, codec-agnostic keyframe control. .. _v4l2-mpeg-video-h264-cpb-size: ``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)`` The Coded Picture Buffer size in kilobytes, it is used as a limitation of frame skip. The CPB is defined in the H264 standard as a mean to verify that the produced stream will be successfully decoded. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)`` Period between I-frames in the open GOP for H264. In case of an open GOP this is the period between two I-frames. The period between IDR (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE control. An IDR frame, which stands for Instantaneous Decoding Refresh is an I-frame after which no prior frames are referenced. This means that a stream can be restarted from an IDR frame without the need to store or decode any previous frames. Applicable to the H264 encoder. .. _v4l2-mpeg-video-header-mode: ``V4L2_CID_MPEG_VIDEO_HEADER_MODE`` (enum) enum v4l2_mpeg_video_header_mode - Determines whether the header is returned as the first buffer or is it returned together with the first frame. Applicable to encoders. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{10.3cm}|p{7.2cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE`` - The stream header is returned separately in the first buffer. * - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME`` - The stream header is returned together with the first encoded frame. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)`` Repeat the video sequence headers. Repeating these headers makes random access to the video stream easier. Applicable to the MPEG1, 2 and 4 encoder. ``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)`` Enabled the deblocking post processing filter for MPEG4 decoder. Applicable to the MPEG4 decoder. ``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)`` vop_time_increment_resolution value for MPEG4. Applicable to the MPEG4 encoder. ``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)`` vop_time_increment value for MPEG4. Applicable to the MPEG4 encoder. ``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)`` Enable generation of frame packing supplemental enhancement information in the encoded bitstream. The frame packing SEI message contains the arrangement of L and R planes for 3D viewing. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)`` Sets current frame as frame0 in frame packing SEI. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-sei-fp-arrangement-type: ``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE`` (enum) enum v4l2_mpeg_video_h264_sei_fp_arrangement_type - Frame packing arrangement type for H264 SEI. Applicable to the H264 encoder. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{12cm}|p{5.5cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD`` - Pixels are alternatively from L and R. * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN`` - L and R are interlaced by column. * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW`` - L and R are interlaced by row. * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE`` - L is on the left, R on the right. * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM`` - L is on top, R on bottom. * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL`` - One view per frame. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)`` Enables flexible macroblock ordering in the encoded bitstream. It is a technique used for restructuring the ordering of macroblocks in pictures. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-fmo-map-type: ``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE`` (enum) enum v4l2_mpeg_video_h264_fmo_map_type - When using FMO, the map type divides the image in different scan patterns of macroblocks. Applicable to the H264 encoder. Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{12.5cm}|p{5.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES`` - Slices are interleaved one after other with macroblocks in run length order. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES`` - Scatters the macroblocks based on a mathematical function known to both encoder and decoder. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER`` - Macroblocks arranged in rectangular areas or regions of interest. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT`` - Slice groups grow in a cyclic way from centre to outwards. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN`` - Slice groups grow in raster scan pattern from left to right. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN`` - Slice groups grow in wipe scan pattern from top to bottom. * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT`` - User defined map type. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)`` Number of slice groups in FMO. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-fmo-change-direction: ``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION`` (enum) enum v4l2_mpeg_video_h264_fmo_change_dir - Specifies a direction of the slice group change for raster and wipe maps. Applicable to the H264 encoder. Possible values are: .. tabularcolumns:: |p{9.6cm}|p{7.9cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT`` - Raster scan or wipe right. * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT`` - Reverse raster scan or wipe left. ``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)`` Specifies the size of the first slice group for raster and wipe map. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)`` Specifies the number of consecutive macroblocks for the interleaved map. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)`` Enables arbitrary slice ordering in encoded bitstream. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)`` Specifies the slice order in ASO. Applicable to the H264 encoder. The supplied 32-bit integer is interpreted as follows (bit 0 = least significant bit): .. flat-table:: :header-rows: 0 :stub-columns: 0 * - Bit 0:15 - Slice ID * - Bit 16:32 - Slice position or order ``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)`` Enables H264 hierarchical coding. Applicable to the H264 encoder. .. _v4l2-mpeg-video-h264-hierarchical-coding-type: ``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE`` (enum) enum v4l2_mpeg_video_h264_hierarchical_coding_type - Specifies the hierarchical coding type. Applicable to the H264 encoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B`` - Hierarchical B coding. * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P`` - Hierarchical P coding. ``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)`` Specifies the number of hierarchical coding layers. Applicable to the H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)`` Specifies a user defined QP for each layer. Applicable to the H264 encoder. The supplied 32-bit integer is interpreted as follows (bit 0 = least significant bit): .. flat-table:: :header-rows: 0 :stub-columns: 0 * - Bit 0:15 - QP value * - Bit 16:32 - Layer number ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 0 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 1 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 2 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 3 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 4 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 5 for H264 encoder. ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)`` Indicates bit rate (bps) for hierarchical coding layer 6 for H264 encoder. ``V4L2_CID_FWHT_I_FRAME_QP (integer)`` Quantization parameter for an I frame for FWHT. Valid range: from 1 to 31. ``V4L2_CID_FWHT_P_FRAME_QP (integer)`` Quantization parameter for a P frame for FWHT. Valid range: from 1 to 31. .. raw:: latex \normalsize MFC 5.1 MPEG Controls ===================== The following MPEG class controls deal with MPEG decoding and encoding settings that are specific to the Multi Format Codec 5.1 device present in the S5P family of SoCs by Samsung. .. _mfc51-control-id: MFC 5.1 Control IDs ------------------- ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)`` If the display delay is enabled then the decoder is forced to return a CAPTURE buffer (decoded frame) after processing a certain number of OUTPUT buffers. The delay can be set through ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This feature can be used for example for generating thumbnails of videos. Applicable to the H264 decoder. .. note:: This control is deprecated. Use the standard ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE`` control instead. ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)`` Display delay value for H264 decoder. The decoder is forced to return a decoded frame after the set 'display delay' number of frames. If this number is low it may result in frames returned out of display order, in addition the hardware may still be using the returned buffer as a reference picture for subsequent frames. .. note:: This control is deprecated. Use the standard ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY`` control instead. ``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)`` The number of reference pictures used for encoding a P picture. Applicable to the H264 encoder. ``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)`` Padding enable in the encoder - use a color instead of repeating border pixels. Applicable to encoders. ``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)`` Padding color in the encoder. Applicable to encoders. The supplied 32-bit integer is interpreted as follows (bit 0 = least significant bit): .. flat-table:: :header-rows: 0 :stub-columns: 0 * - Bit 0:7 - V chrominance information * - Bit 8:15 - U chrominance information * - Bit 16:23 - Y luminance information * - Bit 24:31 - Must be zero. ``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)`` Reaction coefficient for MFC rate control. Applicable to encoders. .. note:: #. Valid only when the frame level RC is enabled. #. For tight CBR, this field must be small (ex. 2 ~ 10). For VBR, this field must be large (ex. 100 ~ 1000). #. It is not recommended to use the greater number than FRAME_RATE * (10^9 / BIT_RATE). ``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)`` Adaptive rate control for dark region. Valid only when H.264 and macroblock level RC is enabled (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 encoder. ``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)`` Adaptive rate control for smooth region. Valid only when H.264 and macroblock level RC is enabled (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 encoder. ``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)`` Adaptive rate control for static region. Valid only when H.264 and macroblock level RC is enabled (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 encoder. ``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)`` Adaptive rate control for activity region. Valid only when H.264 and macroblock level RC is enabled (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 encoder. .. _v4l2-mpeg-mfc51-video-frame-skip-mode: ``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE`` (enum) .. note:: This control is deprecated. Use the standard ``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE`` control instead. enum v4l2_mpeg_mfc51_video_frame_skip_mode - Indicates in what conditions the encoder should skip frames. If encoding a frame would cause the encoded stream to be larger then a chosen data limit then the frame will be skipped. Possible values are: .. tabularcolumns:: |p{9.4cm}|p{8.1cm}| .. raw:: latex \small .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_DISABLED`` - Frame skip mode is disabled. * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT`` - Frame skip mode enabled and buffer limit is set by the chosen level and is defined by the standard. * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT`` - Frame skip mode enabled and buffer limit is set by the VBV (MPEG1/2/4) or CPB (H264) buffer size control. .. raw:: latex \normalsize ``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)`` Enable rate-control with fixed target bit. If this setting is enabled, then the rate control logic of the encoder will calculate the average bitrate for a GOP and keep it below or equal the set bitrate target. Otherwise the rate control logic calculates the overall average bitrate for the stream and keeps it below or equal to the set bitrate. In the first case the average bitrate for the whole stream will be smaller then the set bitrate. This is caused because the average is calculated for smaller number of frames, on the other hand enabling this setting will ensure that the stream will meet tight bandwidth constraints. Applicable to encoders. .. _v4l2-mpeg-mfc51-video-force-frame-type: ``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE`` (enum) enum v4l2_mpeg_mfc51_video_force_frame_type - Force a frame type for the next queued buffer. Applicable to encoders. Possible values are: .. tabularcolumns:: |p{9.9cm}|p{7.6cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED`` - Forcing a specific frame type disabled. * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME`` - Force an I-frame. * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED`` - Force a non-coded frame. CX2341x MPEG Controls ===================== The following MPEG class controls deal with MPEG encoding settings that are specific to the Conexant CX23415 and CX23416 MPEG encoding chips. .. _cx2341x-control-id: CX2341x Control IDs ------------------- .. _v4l2-mpeg-cx2341x-video-spatial-filter-mode: ``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE`` (enum) enum v4l2_mpeg_cx2341x_video_spatial_filter_mode - Sets the Spatial Filter mode (default ``MANUAL``). Possible values are: .. tabularcolumns:: |p{11.5cm}|p{6.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL`` - Choose the filter manually * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO`` - Choose the filter automatically ``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))`` The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default is 0.) .. _luma-spatial-filter-type: ``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE`` (enum) enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type - Select the algorithm to use for the Luma Spatial Filter (default ``1D_HOR``). Possible values: .. tabularcolumns:: |p{13.1cm}|p{4.4cm}| .. raw:: latex \footnotesize .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF`` - No filter * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR`` - One-dimensional horizontal * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT`` - One-dimensional vertical * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE`` - Two-dimensional separable * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE`` - Two-dimensional symmetrical non-separable .. raw:: latex \normalsize .. _chroma-spatial-filter-type: ``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE`` (enum) enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type - Select the algorithm for the Chroma Spatial Filter (default ``1D_HOR``). Possible values are: .. raw:: latex \footnotesize .. tabularcolumns:: |p{11.0cm}|p{6.5cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF`` - No filter * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR`` - One-dimensional horizontal .. raw:: latex \normalsize .. _v4l2-mpeg-cx2341x-video-temporal-filter-mode: ``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE`` (enum) enum v4l2_mpeg_cx2341x_video_temporal_filter_mode - Sets the Temporal Filter mode (default ``MANUAL``). Possible values are: .. raw:: latex \footnotesize .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL`` - Choose the filter manually * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO`` - Choose the filter automatically .. raw:: latex \normalsize ``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))`` The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default is 8 for full-scale capturing and 0 for scaled capturing.) .. _v4l2-mpeg-cx2341x-video-median-filter-type: ``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE`` (enum) enum v4l2_mpeg_cx2341x_video_median_filter_type - Median Filter Type (default ``OFF``). Possible values are: .. raw:: latex \small .. tabularcolumns:: |p{11.0cm}|p{6.5cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF`` - No filter * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR`` - Horizontal filter * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT`` - Vertical filter * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT`` - Horizontal and vertical filter * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG`` - Diagonal filter .. raw:: latex \normalsize ``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` Threshold above which the luminance median filter is enabled (default 0) ``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))`` Threshold below which the luminance median filter is enabled (default 255) ``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` Threshold above which the chroma median filter is enabled (default 0) ``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))`` Threshold below which the chroma median filter is enabled (default 255) ``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)`` The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into the stream between every four video frames. The packet size is 2048 bytes, including the packet_start_code_prefix and stream_id fields. The stream_id is 0xBF (private stream 2). The payload consists of 0x00 bytes, to be filled in by the application. 0 = do not insert, 1 = insert packets. VPX Control Reference ===================== The VPX controls include controls for encoding parameters of VPx video codec. .. _vpx-control-id: VPX Control IDs --------------- .. _v4l2-vpx-num-partitions: ``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS`` (enum) enum v4l2_vp8_num_partitions - The number of token partitions to use in VP8 encoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION`` - 1 coefficient partition * - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS`` - 2 coefficient partitions * - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS`` - 4 coefficient partitions * - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS`` - 8 coefficient partitions ``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)`` Setting this prevents intra 4x4 mode in the intra mode decision. .. _v4l2-vpx-num-ref-frames: ``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES`` (enum) enum v4l2_vp8_num_ref_frames - The number of reference pictures for encoding P frames. Possible values are: .. tabularcolumns:: |p{7.5cm}|p{7.5cm}| .. raw:: latex \small .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME`` - Last encoded frame will be searched * - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME`` - Two frames will be searched among the last encoded frame, the golden frame and the alternate reference (altref) frame. The encoder implementation will decide which two are chosen. * - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME`` - The last encoded frame, the golden frame and the altref frame will be searched. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)`` Indicates the loop filter level. The adjustment of the loop filter level is done via a delta value against a baseline loop filter value. ``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)`` This parameter affects the loop filter. Anything above zero weakens the deblocking effect on the loop filter. ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)`` Sets the refresh period for the golden frame. The period is defined in number of frames. For a value of 'n', every nth frame starting from the first key frame will be taken as a golden frame. For eg. for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden frame refresh period is set as 4, the frames 0, 4, 8 etc will be taken as the golden frames as frame 0 is always a key frame. .. _v4l2-vpx-golden-frame-sel: ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL`` (enum) enum v4l2_vp8_golden_frame_sel - Selects the golden frame for encoding. Possible values are: .. raw:: latex \scriptsize .. tabularcolumns:: |p{8.6cm}|p{8.9cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV`` - Use the (n-2)th frame as a golden frame, current frame index being 'n'. * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD`` - Use the previous specific frame indicated by ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a golden frame. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)`` Minimum quantization parameter for VP8. ``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)`` Maximum quantization parameter for VP8. ``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)`` Quantization parameter for an I frame for VP8. ``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)`` Quantization parameter for a P frame for VP8. .. _v4l2-mpeg-video-vp8-profile: ``V4L2_CID_MPEG_VIDEO_VP8_PROFILE`` (enum) enum v4l2_mpeg_video_vp8_profile - This control allows selecting the profile for VP8 encoder. This is also used to enumerate supported profiles by VP8 encoder or decoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0`` - Profile 0 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1`` - Profile 1 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2`` - Profile 2 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3`` - Profile 3 .. _v4l2-mpeg-video-vp9-profile: ``V4L2_CID_MPEG_VIDEO_VP9_PROFILE`` (enum) enum v4l2_mpeg_video_vp9_profile - This control allows selecting the profile for VP9 encoder. This is also used to enumerate supported profiles by VP9 encoder or decoder. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0`` - Profile 0 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1`` - Profile 1 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2`` - Profile 2 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3`` - Profile 3 .. _v4l2-mpeg-video-vp9-level: ``V4L2_CID_MPEG_VIDEO_VP9_LEVEL (enum)`` enum v4l2_mpeg_video_vp9_level - This control allows selecting the level for VP9 encoder. This is also used to enumerate supported levels by VP9 encoder or decoder. More information can be found at `webmproject <https://www.webmproject.org/vp9/levels/>`__. Possible values are: .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_0`` - Level 1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_1`` - Level 1.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_0`` - Level 2 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_1`` - Level 2.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_0`` - Level 3 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_1`` - Level 3.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_0`` - Level 4 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_1`` - Level 4.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_0`` - Level 5 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_1`` - Level 5.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_2`` - Level 5.2 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_0`` - Level 6 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_1`` - Level 6.1 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_2`` - Level 6.2 High Efficiency Video Coding (HEVC/H.265) Control Reference =========================================================== The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265 video codec. .. _hevc-control-id: HEVC/H.265 Control IDs ---------------------- ``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)`` Minimum quantization parameter for HEVC. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. ``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)`` Maximum quantization parameter for HEVC. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. ``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)`` Quantization parameter for an I frame for HEVC. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)`` Quantization parameter for a P frame for HEVC. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)`` Quantization parameter for a B frame for HEVC. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the HEVC I frame to limit I frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the HEVC I frame to limit I frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the HEVC P frame to limit P frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the HEVC P frame to limit P frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP (integer)`` Minimum quantization parameter for the HEVC B frame to limit B frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP (integer)`` Maximum quantization parameter for the HEVC B frame to limit B frame quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter should be chosen to meet both requirements. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)`` HIERARCHICAL_QP allows the host to specify the quantization parameter values for each temporal layer through HIERARCHICAL_QP_LAYER. This is valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the control value to 1 enables setting of the QP values for the layers. .. _v4l2-hevc-hier-coding-type: ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE`` (enum) enum v4l2_mpeg_video_hevc_hier_coding_type - Selects the hierarchical coding type for encoding. Possible values are: .. raw:: latex \footnotesize .. tabularcolumns:: |p{8.2cm}|p{9.3cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B`` - Use the B frame for hierarchical coding. * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P`` - Use the P frame for hierarchical coding. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)`` Selects the hierarchical coding layer. In normal encoding (non-hierarchial coding), it should be zero. Possible values are [0, 6]. 0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING LAYER 1 and so on. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 0. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 1. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 2. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 3. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 4. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 5. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)`` Indicates quantization parameter for hierarchical coding layer 6. Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. .. _v4l2-hevc-profile: ``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE`` (enum) enum v4l2_mpeg_video_hevc_profile - Select the desired profile for HEVC encoder. .. raw:: latex \footnotesize .. tabularcolumns:: |p{9.0cm}|p{8.5cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN`` - Main profile. * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE`` - Main still picture profile. * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10`` - Main 10 profile. .. raw:: latex \normalsize .. _v4l2-hevc-level: ``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL`` (enum) enum v4l2_mpeg_video_hevc_level - Selects the desired level for HEVC encoder. ================================== ========= ``V4L2_MPEG_VIDEO_HEVC_LEVEL_1`` Level 1.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2`` Level 2.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1`` Level 2.1 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3`` Level 3.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1`` Level 3.1 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4`` Level 4.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1`` Level 4.1 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5`` Level 5.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1`` Level 5.1 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2`` Level 5.2 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6`` Level 6.0 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1`` Level 6.1 ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2`` Level 6.2 ================================== ========= ``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)`` Indicates the number of evenly spaced subintervals, called ticks, within one second. This is a 16 bit unsigned integer and has a maximum value up to 0xffff and a minimum value of 1. .. _v4l2-hevc-tier: ``V4L2_CID_MPEG_VIDEO_HEVC_TIER`` (enum) enum v4l2_mpeg_video_hevc_tier - TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier were made to deal with applications that differ in terms of maximum bit rate. Setting the flag to 0 selects HEVC tier as Main tier and setting this flag to 1 indicates High tier. High tier is for applications requiring high bit rates. ================================== ========== ``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN`` Main tier. ``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH`` High tier. ================================== ========== ``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)`` Selects HEVC maximum coding unit depth. .. _v4l2-hevc-loop-filter-mode: ``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE`` (enum) enum v4l2_mpeg_video_hevc_loop_filter_mode - Loop filter mode for HEVC encoder. Possible values are: .. raw:: latex \footnotesize .. tabularcolumns:: |p{12.1cm}|p{5.4cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED`` - Loop filter is disabled. * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED`` - Loop filter is enabled. * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` - Loop filter is disabled at the slice boundary. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)`` Selects HEVC loop filter beta offset. The valid range is [-6, +6]. ``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)`` Selects HEVC loop filter tc offset. The valid range is [-6, +6]. .. _v4l2-hevc-refresh-type: ``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE`` (enum) enum v4l2_mpeg_video_hevc_hier_refresh_type - Selects refresh type for HEVC encoder. Host has to specify the period into V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD. .. raw:: latex \footnotesize .. tabularcolumns:: |p{6.2cm}|p{11.3cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE`` - Use the B frame for hierarchical coding. * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA`` - Use CRA (Clean Random Access Unit) picture encoding. * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR`` - Use IDR (Instantaneous Decoding Refresh) picture encoding. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)`` Selects the refresh period for HEVC encoder. This specifies the number of I pictures between two CRA/IDR pictures. This is valid only if REFRESH_TYPE is not 0. ``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)`` Indicates HEVC lossless encoding. Setting it to 0 disables lossless encoding. Setting it to 1 enables lossless encoding. ``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)`` Indicates constant intra prediction for HEVC encoder. Specifies the constrained intra prediction in which intra largest coding unit (LCU) prediction is performed by using residual data and decoded samples of neighboring intra LCU only. Setting the value to 1 enables constant intra prediction and setting the value to 0 disables constant intra prediction. ``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)`` Indicates wavefront parallel processing for HEVC encoder. Setting it to 0 disables the feature and setting it to 1 enables the wavefront parallel processing. ``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)`` Setting the value to 1 enables combination of P and B frame for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)`` Indicates temporal identifier for HEVC encoder which is enabled by setting the value to 1. ``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)`` Indicates bi-linear interpolation is conditionally used in the intra prediction filtering process in the CVS when set to 1. Indicates bi-linear interpolation is not used in the CVS when set to 0. ``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)`` Indicates maximum number of merge candidate motion vectors. Values are from 0 to 4. ``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)`` Indicates temporal motion vector prediction for HEVC encoder. Setting it to 1 enables the prediction. Setting it to 0 disables the prediction. ``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)`` Specifies if HEVC generates a stream with a size of the length field instead of start code pattern. The size of the length field is configurable through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting the value to 0 disables encoding without startcode pattern. Setting the value to 1 will enables encoding without startcode pattern. .. _v4l2-hevc-size-of-length-field: ``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD`` (enum) enum v4l2_mpeg_video_hevc_size_of_length_field - Indicates the size of length field. This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled. .. raw:: latex \footnotesize .. tabularcolumns:: |p{5.5cm}|p{12.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0`` - Generate start code pattern (Normal). * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1`` - Generate size of length field instead of start code pattern and length is 1. * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2`` - Generate size of length field instead of start code pattern and length is 2. * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4`` - Generate size of length field instead of start code pattern and length is 4. .. raw:: latex \normalsize ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)`` Indicates bit rate for hierarchical coding layer 0 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)`` Indicates bit rate for hierarchical coding layer 1 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)`` Indicates bit rate for hierarchical coding layer 2 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)`` Indicates bit rate for hierarchical coding layer 3 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)`` Indicates bit rate for hierarchical coding layer 4 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)`` Indicates bit rate for hierarchical coding layer 5 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)`` Indicates bit rate for hierarchical coding layer 6 for HEVC encoder. ``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)`` Selects number of P reference pictures required for HEVC encoder. P-Frame can use 1 or 2 frames for reference. ``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)`` Indicates whether to generate SPS and PPS at every IDR. Setting it to 0 disables generating SPS and PPS at every IDR. Setting it to one enables generating SPS and PPS at every IDR. |