Knowledge (XXG)

Motion JPEG

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picture quality equivalent to a JPEG setting of “50” with mono ADPCM sound sampled at ~8 kHz. This results in a very basic, but serviceable video output at a similar storage cost to MPEG (~120 kB/s video rate, ~8 kB/s audio – or approx 1 Mbit/s at 320Ă—240 resolution), but with minimal processing overheads. This video is typically stored in Microsoft's
186: 392:. M-JPEG-compressed video is also insensitive to motion complexity, i.e. variation over time. It is neither hindered by highly random motion (such as the water-surface turbulence in a large waterfall), nor helped by the absence of motion (such as static landscape shot by tripod), which are two opposite extremes commonly used to test interframe video formats. 376:, achieve real-world compression ratios of 1:50 or better, M-JPEG's lack of interframe prediction limits its efficiency to 1:20 or lower, depending on the tolerance to spatial artifacting in the compressed output. Because frames are compressed independently of one another, M-JPEG imposes lower processing and memory requirements on hardware devices. 601:
form of M-JPEG saw widespread use in the “movie” modes of digital still cameras, allowing video encoding and playback through the integrated JPEG compression hardware with only a software modification. The resultant quality is still inferior compared to a similar-sized MPEG, particularly as the sound
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Originally developed for multimedia PC applications, Motion JPEG enjoys broad client support: most major web browsers and players provide native support, and plug-ins are available for the rest. Software and devices using the M-JPEG standard include media players, game consoles, digital cameras, IP
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informs the client to expect several parts (frames) as an answer delimited by <boundary-name>. This boundary name is expressly disclosed within the MIME-type declaration itself. The TCP connection is not closed as long as the client wants to receive new frames and the server wants to provide
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To keep file sizes and transfer rates under control, frame sizes and rates, along with sound sampling rates, are kept relatively low with very high levels of compression for each individual frame. Resolutions of 160Ă—120 or 320Ă—240 are common sizes, typically at 10, 12 or 15 frames per second, with
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manufacturers. However, each particular file format usually has some standard on how M-JPEG is encoded. For example, Microsoft documents their standard format to store M-JPEG in AVI files, Apple documents how M-JPEG is stored in QuickTime files, RFC 2435 describes how M-JPEG is implemented in an
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As a purely intraframe compression scheme, the image quality of M-JPEG is directly a function of each video frame's static (spatial) complexity. Frames with large smooth transitions or monotone surfaces compress well and are more likely to hold their original details with few visible compression
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and the format specified in the JPEG still-picture coding standard, there is no document that defines a single exact format that is universally recognized as a complete specification of “Motion JPEG” for use in all contexts. This raises compatibility concerns about file outputs from different
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Some network-enabled cameras provide their own M-JPEG interfaces as part of the normal feature set. For cameras that don't provide this feature natively, a server can be used to transcode the camera pictures into an M-JPEG stream and then provide that stream to other network clients.
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can display M-JPEG streams with the help of external plugins. Cambozola is an applet that can show M-JPEG streams in Java-enabled browsers. M-JPEG is also natively supported by PlayStation and QuickTime. Most commonly, M-JPEG is used in IP based security cameras.
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formats, Apple has defined two types of coding: MJPEG-A and MJPEG-B. MJPEG-B no longer retains valid JPEG Interchange Files within it, hence it is not possible to take a frame into a JPEG file without slightly modifying the headers.
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It tolerates rapidly changing motion in the video stream, whereas compression schemes using interframe compression can often experience unacceptable quality loss when the video content changes significantly between each frame.
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Apple announced on September 1, 2010 that their newest version of the Apple TV would support M-JPEG up to 35 Mbit/s, 1280 by 720 pixels, 30 frames per second, audio in ÎĽlaw, PCM stereo audio in .avi file format.
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HTTP streaming separates each image into individual HTTP replies on a specified marker. HTTP streaming creates packets of a sequence of JPEG images that can be received by clients such as
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Motion JPEG is simple to implement because it uses a mature compression standard (JPEG) with well-developed libraries, and it is an intraframe method of compression.
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In addition to portable players (which are mainly "consumers" of the video), many video-enabled digital cameras use M-JPEG for video-capture. For instance:
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camera would use M-JPEG in resolutions 640Ă—416, 1280Ă—720, and 1536Ă—1024. The data rate for the M-JPEG files created can be up to 74 Mbit/s.
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would ship with an onboard CL550 to implement MJPEG. This was however later shelved and wasn't included in the final product that was shipped.
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M-JPEG streams sent to early versions of Mozilla Firefox had to be enclosed within an HTTP document to avoid flickering. See
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was an early proponent with their CL550 JPEG codec been used in several hardware implementations. It was announced that the
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artifacts. Frames exhibiting complex textures, fine curves and lines (such as writing on a newspaper) are prone to exhibit
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M-JPEG is an intraframe-only compression scheme (compared with the more computationally intensive technique of
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container files. These files are viewable natively on most operating systems, however sometimes an additional
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JPEG is inefficient, using more bits to deliver similar quality, compared to more modern formats (such as
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under the .avi extension with a resolution of 480Ă—272. Both can record clips in M-JPEG with its
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can now record and play "3D-AVI" M-JPEG-encoded files, which is the same format used in the
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Certain media players such as the Netgear NeoTV 550 do not support the playback of M-JPEG.
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Many network-enabled cameras provide M-JPEG streams that network clients can connect to.
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cameras, webcams, streaming servers, video cameras, and non-linear video editors.
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for a MJPEG file or stream, the server streams the sequence of JPEG frames over
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digital audio players play short M-JPEG videos. Recent firmware updates to the
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Apple QuickTime Format, including specification for MJPEG-A & MJPEG-B pp96
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and recorded at a low sample rate or low-compression, low processor-demand
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Minimal hardware is required because it is not computationally intensive.
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new frames. Two basic implementations of a M-JPEG streaming server are
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game console integrated M-JPEG like decompression hardware for in-game
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Early implementations of MJPEG were generally implemented in Hardware.
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Motion JPEG was originally developed for multimedia PC applications.
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Apple provided a Software implementation of MJPEG in their
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multipart/x-mixed-replace;boundary=<boundary-name>
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in M-JPEG, with a data rate of approximately 500 Mbit/s.
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Technology improvements can be found in the designs of
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In June 2009, Pentax announced that the then-upcoming
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RFC 2435 RTP Payload Format for JPEG-compressed Video
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M-JPEG is now used by video-capture devices such as
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It is natively supported by the 233:Learn how and when to remove this message 168:Learn how and when to remove this message 763:also provides M-JPEG streaming support. 210:of all important aspects of the article. 833: 438:Unlike the video formats specified in 415:compression schemas possible as well. 206:Please consider expanding the lead to 766:Native web browser support includes: 7: 640:In August 2008, Nikon announced the 106:adding citations to reliable sources 2861:Comparison of audio coding formats 25: 1011:Martins, Claudemir (2017-04-25). 602:(when included) was uncompressed 52:This article has multiple issues. 597:encoding in consumer devices, a 517:non-linear video editing systems 298: 184: 82: 41: 583:Fujifilm FinePix Real 3D series 198:may be too short to adequately 93:needs additional citations for 60:or discuss these issues on the 2423:ISO/IEC base media file format 208:provide an accessible overview 1: 515:M-JPEG is frequently used in 2928: 2866:Comparison of video codecs 1376:(GB/T 33475.2,GY/T 299.1) 1001:(fixed in 2014). 817:JPEG 2000#Motion JPEG 2000 782:. Other browsers, such as 29: 2879: 557:game console, as well as 382:discrete cosine transform 477:non-linear video editing 384:(DCT) artifacts such as 258:video compression format 27:Video compression format 2690:Alliance for Open Media 979:developer.microsoft.com 926:"Press Release Details" 440:international standards 1610:MPEG-1 Layer III (MP3) 739:. A special mime-type 685: 2628:QuickTime File Format 822:QuickTime File Format 679: 593:Prior to the rise in 535:sequences, while the 362:interframe prediction 2887:Compression software 2444:MPEG media transport 1521:Sorenson Video/Spark 658:camera would record 541:Memory Stick Pro Duo 537:PlayStation Portable 102:improve this article 2885:for techniques and 2883:Compression methods 1379:HDR Vivid(GY/T 358) 898:www.fileformat.info 626:must be installed. 352:in the mid-1990s. 757:. The more robust 686: 310:. You can help by 2894: 2893: 2668: 2667: 2586:DivX Media Format 2374: 2373: 2159: 2158: 1559: 1558: 1449:Microsoft Video 1 1384:AVS3 P2(GY/T 368) 1370:(GB/T 20090.2/16) 930:www.usa.canon.com 784:Internet Explorer 731:In response to a 684:using motion jpeg 677: 328: 327: 243: 242: 235: 225: 224: 178: 177: 170: 152: 75: 16:(Redirected from 2919: 2660:VOB, IFO and BUP 2434:Motion JPEG 2000 2385: 2172: 2131:aptX Low Latency 1908:Chinese Standard 1572: 1361:Chinese Standard 1133:Motion JPEG 2000 1102: 1072: 1065: 1058: 1049: 1027: 1026: 1024: 1023: 1008: 1002: 995: 989: 988: 986: 985: 971: 965: 964: 962: 961: 946: 940: 939: 937: 936: 922: 916: 915: 912:"Codec Mappings" 908: 902: 901: 890: 884: 883: 881: 875:. Archived from 874: 866: 860: 859: 852: 846: 845: 838: 805:H.264/MPEG-4 AVC 678: 631:AMV video format 599:progressive scan 475:, as well as by 409:H.264/MPEG-4 AVC 374:H.264/MPEG-4 AVC 350:QuickTime Player 323: 320: 302: 295: 276:separately as a 238: 231: 220: 217: 211: 188: 180: 173: 166: 162: 159: 153: 151: 110: 86: 78: 67: 45: 44: 37: 21: 2927: 2926: 2922: 2921: 2920: 2918: 2917: 2916: 2897: 2896: 2895: 2890: 2875: 2849: 2694: 2664: 2522: 2499: 2471: 2448: 2370: 2289: 2187: 2166: 2155: 1951: 1923:(GB/T 33475.3) 1917:(GB/T 20090.10) 1903: 1880: 1852: 1794: 1756: 1671: 1667:MPEG-H 3D Audio 1593:MPEG-1 Layer II 1583: 1566: 1555: 1387: 1356: 1307: 1269: 1217: 1113: 1096: 1089: 1076: 1036: 1031: 1030: 1021: 1019: 1010: 1009: 1005: 996: 992: 983: 981: 973: 972: 968: 959: 957: 954:www.canon.co.uk 948: 947: 943: 934: 932: 924: 923: 919: 910: 909: 905: 892: 891: 887: 879: 872: 868: 867: 863: 854: 853: 849: 840: 839: 835: 830: 813: 797:H.263v2 Annex I 793: 718: 716:Video streaming 706: 666: 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1886:Bluetooth SIG 1883: 1877: 1874: 1872: 1869: 1867: 1864: 1863: 1861: 1859: 1855: 1849: 1846: 1844: 1841: 1839: 1836: 1834: 1831: 1829: 1826: 1824: 1821: 1819: 1816: 1814: 1811: 1809: 1806: 1805: 1803: 1801: 1797: 1791: 1788: 1786: 1783: 1781: 1778: 1776: 1773: 1771: 1768: 1767: 1765: 1763: 1759: 1753: 1750: 1748: 1745: 1743: 1740: 1738: 1735: 1733: 1730: 1728: 1725: 1723: 1720: 1718: 1715: 1713: 1710: 1708: 1705: 1703: 1700: 1696: 1693: 1691: 1688: 1687: 1686: 1683: 1682: 1680: 1678: 1674: 1668: 1665: 1663: 1660: 1658: 1655: 1653: 1650: 1648: 1645: 1643: 1640: 1638: 1635: 1633: 1632:MPEG Surround 1630: 1626: 1623: 1621: 1618: 1617: 1616: 1613: 1611: 1608: 1606: 1603: 1599: 1596: 1595: 1594: 1591: 1590: 1588: 1586: 1581: 1577: 1573: 1570: 1568: 1562: 1552: 1549: 1547: 1544: 1542: 1539: 1537: 1534: 1532: 1529: 1527: 1524: 1522: 1519: 1517: 1514: 1512: 1509: 1507: 1504: 1502: 1499: 1495: 1492: 1490: 1487: 1486: 1484: 1480: 1477: 1475: 1472: 1471: 1470: 1467: 1465: 1462: 1460: 1457: 1455: 1452: 1450: 1447: 1445: 1442: 1440: 1437: 1435: 1432: 1430: 1427: 1425: 1422: 1420: 1417: 1415: 1412: 1410: 1407: 1405: 1402: 1400: 1397: 1396: 1394: 1390: 1383: 1378: 1377: 1375: 1372: 1369: 1366: 1365: 1363: 1359: 1353: 1350: 1348: 1345: 1343: 1340: 1338: 1335: 1333: 1330: 1328: 1325: 1323: 1320: 1319: 1317: 1314: 1310: 1304: 1301: 1299: 1296: 1294: 1291: 1289: 1286: 1284: 1281: 1280: 1278: 1276: 1272: 1266: 1263: 1261: 1258: 1256: 1253: 1251: 1248: 1246: 1243: 1241: 1238: 1236: 1233: 1232: 1230: 1228: 1224: 1220: 1212: 1209: 1207: 1204: 1203: 1202: 1199: 1195: 1192: 1191: 1190: 1187: 1183: 1182:Part 2 / HEVC 1180: 1179: 1178: 1175: 1171: 1170:Part 33 / IVC 1168: 1166: 1165:Part 10 / AVC 1163: 1161: 1158: 1157: 1156: 1153: 1149: 1146: 1145: 1144: 1141: 1139: 1136: 1134: 1131: 1129: 1126: 1124: 1121: 1120: 1118: 1116: 1111: 1107: 1103: 1100: 1098: 1092: 1087: 1083: 1080: 1073: 1068: 1066: 1061: 1059: 1054: 1053: 1050: 1043: 1041: 1038: 1037: 1033: 1018: 1014: 1007: 1004: 1000: 994: 991: 980: 976: 970: 967: 955: 951: 945: 942: 931: 927: 921: 918: 913: 907: 904: 899: 895: 889: 886: 878: 871: 865: 862: 857: 851: 848: 843: 837: 834: 827: 823: 820: 818: 815: 814: 810: 808: 806: 802: 801:MPEG-4 Part 2 798: 790: 788: 785: 781: 777: 773: 772:Google Chrome 769: 764: 762: 761: 760:ffmpeg-server 756: 755: 754:MJPG-Streamer 750: 745: 742: 738: 734: 729: 727: 723: 715: 713: 710: 704:Media players 703: 701: 697: 695: 691: 683: 661: 657: 653: 650: 646: 643: 639: 638: 637: 634: 632: 627: 625: 621: 617: 611: 609: 605: 600: 596: 588: 586: 584: 580: 576: 573:e200 and the 572: 571:SanDisk Sansa 568: 567:Photo Channel 564: 560: 556: 552: 548: 546: 542: 538: 534: 530: 523:Game consoles 522: 520: 518: 511:Video editing 510: 508: 506: 502: 498: 497:Google Chrome 494: 490: 487:console, and 486: 482: 478: 474: 470: 466: 458: 456: 455:file format. 454: 450: 445: 441: 433: 431: 428: 424: 418: 416: 414: 410: 406: 401: 398: 393: 391: 390:macroblocking 387: 383: 377: 375: 371: 367: 363: 355: 353: 351: 346: 344: 340: 339:NeXTdimension 336: 331: 322: 313: 309: 306:This section 304: 301: 297: 296: 290: 288: 284: 282: 279: 275: 271: 270:digital video 267: 263: 259: 255: 251: 247: 237: 234: 219: 216:December 2020 209: 203: 201: 196: 191: 187: 182: 181: 172: 169: 161: 150: 147: 143: 140: 136: 133: 129: 126: 122: 119: â€“  118: 117:"Motion JPEG" 114: 113:Find sources: 107: 103: 97: 96: 91:This article 89: 85: 80: 79: 74: 72: 65: 64: 59: 58: 53: 48: 39: 38: 33: 19: 2912:Video codecs 1937:(GB/T 22726) 1598:Multichannel 1454:MSU Lossless 1368:AVS1 P2/AVS+ 1322:TrueMotion S 1260:H.265 / HEVC 1206:Part 1 / EVC 1194:Part 3 / VVC 1160:Part 2 / ASP 1127: 1020:. Retrieved 1016: 1006: 993: 982:. Retrieved 978: 969: 958:. Retrieved 956:. 2016-09-19 953: 944: 933:. Retrieved 929: 920: 906: 897: 894:"BMPDIB.TXT" 888: 877:the original 864: 850: 836: 794: 765: 758: 752: 748: 743: 741:content type 730: 719: 711: 707: 698: 687: 635: 628: 612: 592: 579:Nintendo 3DS 549: 526: 514: 489:web browsers 483:Player, the 462: 459:Applications 437: 429: 425: 422: 402: 394: 378: 359: 347: 332: 329: 316: 312:adding to it 307: 285: 272:sequence is 253: 249: 245: 244: 229: 213: 197: 195:lead section 164: 155: 145: 138: 131: 124: 112: 100:Please help 95:verification 92: 68: 61: 55: 54:Please help 51: 2655:MOD and TOD 2596:Flash Video 2534:3GP and 3G2 2215:HEIC / HEIF 2167:compression 1927:Audio Vivid 1662:MPEG-D USAC 1657:MPEG-4 CELP 1652:MPEG-4 HVXC 1567:compression 1399:Apple Video 1315:and AOMedia 1265:H.266 / VVC 1255:H.264 / AVC 1097:compression 1082:compression 733:GET request 618:or Apple's 529:PlayStation 485:PlayStation 319:August 2012 268:field of a 262:video frame 246:Motion JPEG 158:August 2007 2901:Categories 2889:for codecs 2836:Daubechies 2811:Transforms 2713:Arithmetic 2380:Containers 2085:True Audio 1929:(GY/T 363) 1647:MPEG-4 DST 1642:MPEG-4 SLS 1637:MPEG-4 ALS 1511:SheerVideo 1485:QuickTime 1313:TrueMotion 1079:Multimedia 1022:2023-10-22 999:Bug 625012 984:2016-08-25 960:2016-11-06 935:2016-11-06 828:References 791:Successors 656:5D Mark IV 565:using its 469:IP cameras 449:RTP stream 413:interframe 274:compressed 266:interlaced 128:newspapers 57:improve it 2638:RealMedia 2240:JPEG 2000 2043:RealAudio 2023:OptimFROG 1501:RealVideo 1489:Animation 1459:OMS Video 1086:container 749:cambozola 722:QuickTime 481:QuickTime 405:JPEG 2000 397:QuickTime 200:summarize 63:talk page 2757:Lossless 2723:Modified 2616:Matroska 2495:Matroska 2406:MPEG-PES 2018:Musepack 1915:AVS1 P10 1494:Graphics 1444:Lagarith 811:See also 660:4K video 551:Nintendo 547:camera. 491:such as 453:Matroska 442:such as 419:Features 2831:Wavelet 2772:DEFLATE 2718:Huffman 2708:Entropy 2700:Methods 2685:MPEG LA 2574:Smacker 2462:H.222.0 2418:MPEG-TS 2413:MPEG-PS 2401:MPEG-ES 2285:TIFF/IT 2280:TIFF/EP 2265:JPEG XT 2260:JPEG XS 2255:JPEG XR 2250:JPEG XL 2245:JPEG-LS 2126:aptX HD 2106:WavPack 2048:RTAudio 1988:Codec 2 1921:AVS2 P3 1848:GSM-EFR 1818:AMR-WB+ 1752:G.729.1 1732:G.723.1 1722:G.722.2 1717:G.722.1 1516:Smacker 1506:RTVideo 1434:Huffyuv 1414:Cinepak 1374:AVS2 P2 1088:formats 844:. 1990. 780:Firefox 690:Mozilla 563:SD card 473:webcams 386:ringing 291:History 256:) is a 142:scholar 2633:RatDVD 2527:Others 2294:Others 2096:VMR-WB 2091:TwinVQ 1956:Others 1843:GSM-FR 1838:GSM-HR 1828:EVRC-B 1813:AMR-WB 1785:Vorbis 1625:AAC-LD 1620:HE-AAC 1526:Theora 1469:ProRes 1464:Pixlet 1392:Others 1201:MPEG-5 1189:MPEG-I 1177:MPEG-H 1155:MPEG-4 1148:Part 2 1143:MPEG-2 1138:MPEG-1 768:Safari 694:Webkit 682:DCI 4K 595:MPEG-4 569:. The 545:Go!Cam 493:Safari 471:, and 444:MPEG-2 356:Design 335:C-Cube 250:M-JPEG 144:  137:  130:  123:  115:  2854:Lists 2799:ADPCM 2794:µ-law 2789:A-law 2762:Lossy 2735:ACELP 2680:NETVC 2505:SMPTE 2467:T.802 2454:ITU-T 2430:(MP4) 2230:JBIG2 2193:ITU-T 2165:Image 2101:VSELP 2078:SVOPC 2068:Siren 2038:RCELP 2033:QCELP 1978:ATRAC 1963:ACELP 1780:Speex 1747:G.729 1742:G.728 1737:G.726 1727:G.723 1712:G.722 1707:G.719 1702:G.718 1695:µ-law 1690:A-law 1685:G.711 1677:ITU-T 1565:Audio 1439:Indeo 1419:Daala 1275:SMPTE 1250:H.263 1245:H.262 1240:H.261 1235:H.120 1223:ITU-T 1128:MJPEG 1095:Video 880:(PDF) 873:(PDF) 624:codec 608:ADPCM 575:Zen V 559:VTech 370:MPEG2 366:MPEG1 341:from 281:image 254:MJPEG 149:JSTOR 135:books 18:MJPEG 2907:JPEG 2881:See 2826:MDCT 2804:DPCM 2750:WLPC 2740:CELP 2643:RIFF 2621:WebM 2611:M2TS 2601:HEIF 2569:Bink 2549:AIFF 2477:IETF 2366:WebP 2361:WBMP 2356:QTVR 2336:ICER 2331:FLIF 2321:DjVu 2311:AVIF 2301:APNG 2275:TIFF 2235:JPEG 2225:JBIG 2220:HEVC 2197:JPEG 2184:IETF 2151:LLAC 2146:LHDC 2141:LDAC 2121:aptX 2082:TTA 2063:SILK 2003:MELP 1998:Lyra 1993:iSAC 1983:CELT 1973:Asao 1968:ALAC 1946:ExAC 1941:L2HC 1871:AC-4 1866:AC-3 1858:ETSI 1823:EVRC 1800:3GPP 1790:FLAC 1775:iLBC 1770:Opus 1762:IETF 1585:MPEG 1551:YULS 1531:Thor 1479:4444 1429:FFV1 1409:Bink 1303:VC-6 1298:VC-5 1293:VC-3 1288:VC-2 1283:VC-1 1227:VCEG 1115:MPEG 1084:and 799:and 778:and 751:and 737:HTTP 692:and 629:The 527:The 503:and 407:and 395:For 372:and 343:NeXT 278:JPEG 121:news 32:MPEG 2841:DWT 2821:FFT 2816:DCT 2784:PCM 2777:LZW 2745:LSP 2730:LPC 2648:WAV 2606:IFF 2591:EVO 2581:BMP 2564:BPG 2554:AVI 2544:ASF 2539:AMV 2518:MXF 2513:GXF 2490:Ogg 2485:RTP 2393:IEC 2389:ISO 2351:QOI 2346:PGF 2341:MNG 2326:EXR 2316:BPG 2306:AV1 2270:PNG 2210:GIF 2189:W3C 2180:ISO 2176:IEC 2116:MQA 2111:WMA 2073:SMV 2058:SHN 2053:SD2 2028:OSQ 2013:MT9 1935:DRA 1899:LC3 1894:SBC 1876:DTS 1833:EVS 1808:AMR 1615:AAC 1580:IEC 1576:ISO 1546:XEB 1541:WMV 1474:422 1424:DVI 1404:AVS 1352:AV1 1347:VP9 1342:VP8 1337:VP7 1332:VP6 1327:VP3 1110:IEC 1106:ISO 726:VLC 724:or 649:K-7 642:D90 616:AVI 604:PCM 555:Wii 553:'s 533:FMV 314:. 264:or 252:or 104:by 2903:: 2767:LZ 2559:AU 2391:, 2195:, 2191:, 2186:, 2182:, 2178:, 1578:, 1536:Ut 1225:, 1123:DV 1112:, 1108:, 1015:. 977:. 952:. 928:. 896:. 774:, 770:, 728:. 610:. 507:. 499:, 495:, 467:, 368:, 283:. 66:. 1582:, 1071:e 1064:t 1057:v 1025:. 987:. 963:. 938:. 914:. 900:. 858:. 321:) 317:( 248:( 236:) 230:( 218:) 214:( 204:. 171:) 165:( 160:) 156:( 146:· 139:· 132:· 125:· 98:. 73:) 69:( 34:. 20:)

Index

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verification
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