Am Sa., 21. Sept. 2019 um 20:16 Uhr schrieb Rodger Combs <rodger.co...@gmail.com>: > > Fixes some files misdetecting as MPEG PS
The reason for the misdetection (mp3 file with 50k header that contains a mjpeg cover) are the following "lame tags" (I couldn't immediately find out what they really are) which nearly all contain "02 ae" which is identified as VIDEO_ID by the mpegps probe function. The video variable is 9 after 64k of the function, all other relevant variables are 0): 0000e880 00 00 00 00 00 00 00 00 00 00 00 00 00 ff fb e2 |................| 0000e890 44 00 0f f0 78 00 ab 83 e0 00 00 0e 80 16 c0 7c |D...x..........|| 0000e8a0 00 00 01 e0 02 ae 0f 80 00 00 3a 00 5b 01 f0 00 |..........:.[...| 0000e8b0 00 2b f4 b7 ff ff ff ff ff d3 ff ff ff ff ff e9 |.+..............| 0000e8c0 2b e8 3b ff ff ff ff ff ff ff ff ff ff fe 82 bf |+.;.............| 0000e8d0 4b 7f ff ff ff ff fd 3f ff ff ff ff fe 92 be 83 |K......?........| 0000e8e0 bf ff ff ff ff ff ff ff ff ff ff e8 4c 41 4d 45 |............LAME| 0000e8f0 33 2e 39 38 2e 32 00 00 00 00 00 00 00 00 00 00 |3.98.2..........| 0000e900 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0000eca0 00 00 ff fb e2 44 00 0f f0 78 00 ab 83 e0 00 00 |.....D...x......| 0000ecb0 0e 80 16 c0 7c 00 00 01 e0 02 ae 0f 80 00 00 3a |....|..........:| 0000ecc0 00 5b 01 f0 00 00 2b f4 b7 ff ff ff ff ff d3 ff |.[....+.........| 0000ecd0 ff ff ff ff e9 2b e8 3b ff ff ff ff ff ff ff ff |.....+.;........| 0000ece0 ff ff fe 82 bf 4b 7f ff ff ff ff fd 3f ff ff ff |.....K......?...| 0000ecf0 ff fe 92 be 83 bf ff ff ff ff ff ff ff ff ff ff |................| 0000ed00 e8 4c 41 4d 45 33 2e 39 38 2e 32 00 00 00 00 00 |.LAME3.98.2.....| 0000ed10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0000f0b0 00 00 00 00 00 00 00 ff fb e2 44 00 0f f0 78 00 |..........D...x.| 0000f0c0 ab 83 e0 00 00 0e 80 16 c0 7c 00 00 01 e0 02 ae |.........|......| 0000f0d0 0f 80 00 00 3a 00 5b 01 f0 00 00 2b f4 b7 ff ff |....:.[....+....| 0000f0e0 ff ff ff d3 ff ff ff ff ff e9 2b e8 3b ff ff ff |..........+.;...| 0000f0f0 ff ff ff ff ff ff ff fe 82 bf 4b 7f ff ff ff ff |..........K.....| 0000f100 fd 3f ff ff ff ff fe 92 be 83 bf ff ff ff ff ff |.?..............| 0000f110 ff ff ff ff ff e8 4c 41 4d 45 33 2e 39 38 2e 32 |......LAME3.98.2| 0000f120 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0000f4c0 00 00 00 00 00 00 00 00 00 00 00 00 ff fb e2 44 |...............D| 0000f4d0 00 0f f0 78 00 ab 83 e0 00 00 0e 80 16 c0 7c 00 |...x..........|.| 0000f4e0 00 01 e0 02 ae 0f 80 00 00 3a 00 5b 01 f0 00 00 |.........:.[....| 0000f4f0 2b f4 b7 ff ff ff ff ff d3 ff ff ff ff ff e9 2b |+..............+| 0000f500 e8 3b ff ff ff ff ff ff ff ff ff ff fe 82 bf 4b |.;.............K| 0000f510 7f ff ff ff ff fd 3f ff ff ff ff fe 92 be 83 bf |......?.........| 0000f520 ff ff ff ff ff ff ff ff ff ff e8 4c 41 4d 45 33 |...........LAME3| 0000f530 2e 39 38 2e 32 00 00 00 00 00 00 00 00 00 00 00 |.98.2...........| 0000f540 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0000f8e0 00 ff fb e2 44 00 0f f0 78 00 ab 83 e0 00 00 0e |....D...x.......| 0000f8f0 80 16 c0 7c 00 00 01 e0 02 ae 0f 80 00 00 3a 00 |...|..........:.| 0000f900 5b 01 f0 00 00 2b f4 b7 ff ff ff ff ff d3 ff ff |[....+..........| 0000f910 ff ff ff e9 2b e8 3b ff ff ff ff ff ff ff ff ff |....+.;.........| 0000f920 ff fe 82 bf 4b 7f ff ff ff ff fd 3f ff ff ff ff |....K......?....| 0000f930 fe 92 be 83 bf ff ff ff ff ff ff ff ff ff ff e8 |................| 0000f940 4c 41 4d 45 33 2e 39 38 2e 32 00 00 00 00 00 00 |LAME3.98.2......| 0000f950 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0000fcf0 00 00 00 00 00 00 ff fb e2 44 00 0f f0 78 00 ab |.........D...x..| 0000fd00 83 e0 00 00 0e 80 16 c0 7c 00 00 01 e0 02 ae 0f |........|.......| 0000fd10 80 00 00 3a 00 5b 01 f0 00 00 2b f4 b7 ff ff ff |...:.[....+.....| 0000fd20 ff ff d3 ff ff ff ff ff e9 2b e8 3b ff ff ff ff |.........+.;....| 0000fd30 ff ff ff ff ff ff fe 82 bf 4b 7f ff ff ff ff fd |.........K......| 0000fd40 3f ff ff ff ff fe 92 be 83 bf ff ff ff ff ff ff |?...............| 0000fd50 ff ff ff ff e8 4c 41 4d 45 33 2e 39 38 2e 32 00 |.....LAME3.98.2.| 0000fd60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| I would expect that it is possible to detect that the above are not valid mpeg video packets. Carl Eugen _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
