#6207: Wrong mkv codec ID for ac3 with bitstream_id > 8 --------------------------------------+---------------------------------- Reporter: cehoyos | Owner: Type: defect | Status: new Priority: normal | Component: avformat Version: git-master | Keywords: mkv ac3 Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 --------------------------------------+---------------------------------- I will attached two mkv samples with codec ID A_AC3/BSID9 and A_AC3/BSID10 that get an incorrect codec ID A_AC3 when remuxed with FFmpeg. {{{ $ ffmpeg -i ac3bsid9.mkv -acodec copy out.mkv ffmpeg version N-83691-g7f62368 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 4.7 (SUSE Linux) configuration: --enable-gpl libavutil 55. 47.100 / 55. 47.100 libavcodec 57. 81.100 / 57. 81.100 libavformat 57. 66.102 / 57. 66.102 libavdevice 57. 3.100 / 57. 3.100 libavfilter 6. 74.100 / 6. 74.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 Input #0, matroska,webm, from 'ac3bsid9.mkv': Metadata: encoder : libebml v1.3.4 + libmatroska v1.4.5 creation_time : 2017-02-28T20:08:32.000000Z Duration: 00:00:01.02, start: 0.000000, bitrate: 141 kb/s Stream #0:0: Audio: ac3, 24000 Hz, mono, fltp, 96 kb/s (default) Metadata: BPS : 96000 BPS-eng : 96000 DURATION : 00:00:01.024000705 DURATION-eng : 00:00:01.024000705 NUMBER_OF_FRAMES: 16 NUMBER_OF_FRAMES-eng: 16 NUMBER_OF_BYTES : 12288 NUMBER_OF_BYTES-eng: 12288 _STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-02-28 20:08:32 _STATISTICS_WRITING_DATE_UTC-eng: 2017-02-28 20:08:32 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Output #0, matroska, to 'out.mkv': Metadata: encoder : Lavf57.66.102 Stream #0:0: Audio: ac3 ([0] [0][0] / 0x2000), 24000 Hz, mono, fltp, 96 kb/s (default) Metadata: BPS : 96000 BPS-eng : 96000 DURATION : 00:00:01.024000705 DURATION-eng : 00:00:01.024000705 NUMBER_OF_FRAMES: 16 NUMBER_OF_FRAMES-eng: 16 NUMBER_OF_BYTES : 12288 NUMBER_OF_BYTES-eng: 12288 _STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-02-28 20:08:32 _STATISTICS_WRITING_DATE_UTC-eng: 2017-02-28 20:08:32 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream mapping: Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help size= 13kB time=00:00:00.96 bitrate= 114.5kbits/s speed=3.69e+03x video:0kB audio:12kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 11.832683% }}} {{{ $ ffmpeg -i ac3bsid10.mkv -acodec copy out.mkv ffmpeg version N-83691-g7f62368 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 4.7 (SUSE Linux) configuration: --enable-gpl libavutil 55. 47.100 / 55. 47.100 libavcodec 57. 81.100 / 57. 81.100 libavformat 57. 66.102 / 57. 66.102 libavdevice 57. 3.100 / 57. 3.100 libavfilter 6. 74.100 / 6. 74.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 Input #0, matroska,webm, from 'ac3bsid10.mkv': Metadata: encoder : libebml v1.3.4 + libmatroska v1.4.5 creation_time : 2017-02-28T20:08:01.000000Z Duration: 00:00:01.15, start: 0.000000, bitrate: 136 kb/s Stream #0:0: Audio: ac3, 8000 Hz, mono, fltp, 96 kb/s (default) Metadata: BPS : 96083 BPS-eng : 96083 DURATION : 00:00:01.151990784 DURATION-eng : 00:00:01.151990784 NUMBER_OF_FRAMES: 6 NUMBER_OF_FRAMES-eng: 6 NUMBER_OF_BYTES : 13824 NUMBER_OF_BYTES-eng: 13824 _STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-02-28 20:08:01 _STATISTICS_WRITING_DATE_UTC-eng: 2017-02-28 20:08:01 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Output #0, matroska, to 'out.mkv': Metadata: encoder : Lavf57.66.102 Stream #0:0: Audio: ac3 ([0] [0][0] / 0x2000), 8000 Hz, mono, fltp, 96 kb/s (default) Metadata: BPS : 96083 BPS-eng : 96083 DURATION : 00:00:01.151990784 DURATION-eng : 00:00:01.151990784 NUMBER_OF_FRAMES: 6 NUMBER_OF_FRAMES-eng: 6 NUMBER_OF_BYTES : 13824 NUMBER_OF_BYTES-eng: 13824 _STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-02-28 20:08:01 _STATISTICS_WRITING_DATE_UTC-eng: 2017-02-28 20:08:01 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream mapping: Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help size= 15kB time=00:00:00.96 bitrate= 126.7kbits/s speed=5.03e+03x video:0kB audio:14kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.997107% }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6207> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker