#1796(undetermined:new): Unable to extract PCM audio track from AVI file
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: I have an AVI-wrapped dvvideo file with a single pcm_s16le audio track. The video plays fine (although there is a funny noise at the start that might indicate some kind of corruption or encoding problem). I am able to extract the audio using MPlayer, and ffmpeg can successfully produce a lower-quality avi file and extract the audio as mp3. I am able to run ffmpeg a second time to get a WAV file from either of these. However, if I simply try to extract the audio track directly into a WAV file from the original AVI file, all I get is 0.03 seconds of noise. There is no error message, so the software I'm writing that is running ffmpeg and monitoring the output can't tell anything went wrong. How to reproduce: {{{ % ffmpeg -i TruncatedPCMAudio.avi -vn -acodec copy temp.wav - OR - % ffmpeg -i TruncatedPCMAudio.avi -vn -acodec pcm_s16le temp.wav ffmpeg version N-40126-ga4b58fd built on Apr 26 2012 03:29:50 with gcc 4.6.3 }}} ffmpeg -v 9 -loglevel 99 -i TruncatedPCMAudio.avi ffmpeg version N-40126-ga4b58fd Copyright (c) 2000-2012 the FFmpeg developers built on Apr 26 2012 03:29:50 with gcc 4.6.3 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable- libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable -libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable- libope njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable- libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable- libxvid --e nable-zlib libavutil 51. 47.100 / 51. 47.100 libavcodec 54. 15.100 / 54. 15.100 libavformat 54. 3.100 / 54. 3.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 72.100 / 2. 72.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 11.100 / 0. 11.100 libpostproc 52. 0.100 / 52. 0.100 [avi @ 01d3c020] Format avi probed with size=2048 and score=100 [AVI demuxer @ 01d3c680] use odml:1 [avi @ 01d3c020] File position before avformat_find_stream_info() is 32768 [avi @ 01d3c020] All info found [avi @ 01d3c020] File position after avformat_find_stream_info() is 185032 Input #0, avi, from 'TruncatedPCMAudio.avi': Duration: 00:03:52.46, start: 0.000000, bitrate: 28855 kb/s Stream #0:0, 1, 1001/30000: Video: dvvideo, yuv411p, 720x480, 1001/30000, 28 771 kb/s, SAR 8:9 DAR 4:3, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1, 1, 1/30000: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 k b/s At least one output file must be specified -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Owner: Type: defect | Status: new Priority: normal | Component: Version: unspecified | undetermined Keywords: | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- Comment (by cehoyos): Please provide the complete, uncut console output of $ ffmpeg -i yourfile out.wav -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796#comment:1> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
ffmpeg -i TruncatedPCMAudio.avi out.wav ffmpeg version N-40126-ga4b58fd Copyright (c) 2000-2012 the FFmpeg developers built on Apr 26 2012 03:29:50 with gcc 4.6.3 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Owner: Type: defect | Status: new Priority: normal | Component: Version: unspecified | undetermined Keywords: | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- Comment (by tom_bogle): Here is the complete output when I run that command against my original, full-length AVI file: libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable -libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable- libope njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable- libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable- libxvid --e nable-zlib libavutil 51. 47.100 / 51. 47.100 libavcodec 54. 15.100 / 54. 15.100 libavformat 54. 3.100 / 54. 3.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 72.100 / 2. 72.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 11.100 / 0. 11.100 libpostproc 52. 0.100 / 52. 0.100 Input #0, avi, from 'TruncatedPCMAudio.avi': Duration: 00:03:52.46, start: 0.000000, bitrate: 28855 kb/s Stream #0:0: Video: dvvideo, yuv411p, 720x480, 28771 kb/s, SAR 8:9 DAR 4:3, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Guessed Channel Layout for Input Stream #0.1 : stereo Output #0, wav, to 'out.wav': Metadata: encoder : Lavf54.3.100 Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16 , 1536 kb/s Stream mapping: Stream #0:1 -> #0:0 (pcm_s16le -> pcm_s16le) Press [q] to stop, [?] for help Input stream #0:1 frame changed from rate:48000 fmt:s16 ch:2 chl:0x0 to rate:480 00 fmt:s16 ch:2 chl:0x3 size= 6kB time=00:00:00.03 bitrate=1547.0kbits/s video:0kB audio:6kB global headers:0kB muxing overhead 0.717853% -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796#comment:2> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Owner: Type: defect | Status: new Priority: normal | Component: Version: unspecified | undetermined Keywords: | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- Comment (by cehoyos): How does the output look for ffmpeg -i TruncatedPCMAudio.avi out.mp2 (or mp3)? If I understand your original report correctly, the output is longer than 0,03 seconds. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796#comment:3> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Owner: Type: defect | Status: open Priority: normal | Component: Version: git-master | undetermined Keywords: avi | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 1 -------------------------------------+------------------------------------- Changes (by cehoyos): * keywords: => avi * status: new => open * version: unspecified => git-master * reproduced: 0 => 1 Comment: (I originally failed to reproduce the problem, sorry.) out2.wav is significantly longer than out.wav {{{ $ ffmpeg -i TruncatedPCMAudio_smallsample.avi out.wav ffmpeg version N-47510-g0f65d56 Copyright (c) 2000-2012 the FFmpeg developers built on Dec 6 2012 12:30:03 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --disable-indev=jack libavutil 52. 11.102 / 52. 11.102 libavcodec 54. 79.100 / 54. 79.100 libavformat 54. 46.100 / 54. 46.100 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 24.100 / 3. 24.100 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 Input #0, avi, from 'TruncatedPCMAudio_smallsample.avi': Duration: 00:03:52.47, start: 0.000000, bitrate: 88 kb/s Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], 28771 kb/s, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Output #0, wav, to 'out.wav': Metadata: ISFT : Lavf54.46.100 Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:1 -> #0:0 (pcm_s16le -> pcm_s16le) Press [q] to stop, [?] for help size= 6kB time=00:00:00.03 bitrate=1555.2kbits/s video:0kB audio:6kB subtitle:0 global headers:0kB muxing overhead 1.248439% }}} {{{ $ ffmpeg -i TruncatedPCMAudio_smallsample.avi -qscale 2 out.avi ffmpeg version N-47510-g0f65d56 Copyright (c) 2000-2012 the FFmpeg developers built on Dec 6 2012 12:30:03 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --disable-indev=jack libavutil 52. 11.102 / 52. 11.102 libavcodec 54. 79.100 / 54. 79.100 libavformat 54. 46.100 / 54. 46.100 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 24.100 / 3. 24.100 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 Input #0, avi, from 'TruncatedPCMAudio_smallsample.avi': Duration: 00:03:52.47, start: 0.000000, bitrate: 88 kb/s Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], 28771 kb/s, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Please use -q:a or -q:v, -qscale is ambiguous Output #0, avi, to 'out.avi': Metadata: ISFT : Lavf54.46.100 Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s Stream mapping: Stream #0:0 -> #0:0 (dvvideo -> mpeg4) Stream #0:1 -> #0:1 (pcm_s16le -> ac3) Press [q] to stop, [?] for help [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] Last message repeated 2 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 AC EOB marker is absent pos=67 AC EOB marker is absent pos=64messsage repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=67 Last message repeated 4 times Last message repeated 4 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=87 [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 AC EOB marker is absent pos=66mes [dvvideo @ 0x337b540] AC EOB marker is absent pos=77 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 AC EOB marker is absent pos=67 Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=78 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] AC EOB marker is absent pos=75 [dvvideo @ 0x337b540] AC EOB marker is absent pos=71 Last message repeated 6 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 AC EOB marker is absent pos=64mes Last message repeated 3 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=74 [dvvideo @ 0x337b540] AC EOB marker is absent pos=67 [dvvideo @ 0x337b540] AC EOB marker is absent pos=84 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 Last message repeated 2 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 Last message repeated 1 timesssage repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 AC EOB marker is absent pos=64mes [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] Last message repeated 1 times Last message repeated 1 times AC EOB marker is absent pos=65 Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 AC EOB marker is absent pos=71 [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=69 Last message repeated 2 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=68 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 Last message repeated 2 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 Last message repeated 2 times [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=72 [dvvideo @ 0x337b540] AC EOB marker is absent pos=67 AC EOB marker is absent pos=71 [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 Last message repeated 1 times [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 AC EOB marker is absent pos=75 [dvvideo @ 0x337b540] AC EOB marker is absent pos=67 [dvvideo @ 0x337b540] AC EOB marker is absent pos=68 Last message repeated 1 timesssage repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=78 Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=79 AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=74 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 AC EOB marker is absent pos=66mes Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=65 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=73 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 [dvvideo @ 0x337b540] AC EOB marker is absent pos=66 AC EOB marker is absent pos=65 AC EOB marker is absent pos=79 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 [dvvideo @ 0x337b540] AC EOB marker is absent pos=79 Last message repeated 1 times [dvvideo @ 0x337b540] AC EOB marker is absent pos=82 [dvvideo @ 0x337b540] AC EOB marker is absent pos=71 [dvvideo @ 0x337b540] AC EOB marker is absent pos=64 Truncating packet of size 120000 to 88569 frame= 20 fps=0.0 q=2.0 Lsize= 1333kB time=00:00:00.67 bitrate=16253.5kbits/s video:1307kB audio:16kB subtitle:0 global headers:0kB muxing overhead 0.810966% }}} {{{ $ ffmpeg -i out.avi out2.wav ffmpeg version N-47510-g0f65d56 Copyright (c) 2000-2012 the FFmpeg developers built on Dec 6 2012 12:30:03 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl --disable-indev=jack libavutil 52. 11.102 / 52. 11.102 libavcodec 54. 79.100 / 54. 79.100 libavformat 54. 46.100 / 54. 46.100 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 24.100 / 3. 24.100 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 Input #0, avi, from 'out.avi': Metadata: encoder : Lavf54.46.100 Duration: 00:00:00.67, start: 0.000000, bitrate: 16253 kb/s Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, s16, 192 kb/s Output #0, wav, to 'out2.wav': Metadata: ISFT : Lavf54.46.100 Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:1 -> #0:0 (ac3 -> pcm_s16le) Press [q] to stop, [?] for help size= 126kB time=00:00:00.67 bitrate=1537.0kbits/s video:0kB audio:126kB subtitle:0 global headers:0kB muxing overhead 0.062004% }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796#comment:4> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#1796: Unable to extract PCM audio track from AVI file -------------------------------------+------------------------------------- Reporter: tom_bogle | Owner: Type: defect | Status: open Priority: normal | Component: Version: git-master | undetermined Keywords: dvvideo avi | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 1 -------------------------------------+------------------------------------- Changes (by cehoyos): * keywords: avi => dvvideo avi -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1796#comment:5> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
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