Opened 12 years ago

Closed 11 years ago

#1952 closed enhancement (invalid)

ffmpeg: warn user when attemping to manipulate stream that is potentially empty

Reported by: ramitb Owned by:
Priority: normal Component: ffmpeg
Version: git-master Keywords: wtv ac3
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug: When trying to copy audio streams it reports the audio stream as 0 channels and then fails to copy the stream.

How to reproduce:
ffmpeg.x86.exe -i broken_remux.wtv -codec copy -map 0:a out.ts

ffmpeg version N-46726-g2f74f8d Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 13 2012 19:29:51 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable
-bzlib --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroed
inger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52.  6.100 / 52.  6.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.100 /  3. 23.100
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[wtv @ 01f7af20] reported file length (0x4fd7094c) exceeds number of available sectors (0x40000000)
[mpeg2video @ 03cd5cc0] mpeg_decode_postinit() failure
    Last message repeated 18 times
[wtv @ 01f7af20] Could not find codec parameters for stream 2 (Audio: ac3, 0 channels, s16): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, wtv, from 'broken_remux.wtv':
  Metadata:
    WM/MediaClassPrimaryID: db9830bd-3ab3-4fab-8a371a995f7ff74
    WM/MediaClassSecondaryID: ba7f258a-62f7-47a9-b21f4651c42a000
    Title           : Covert Affairs
    WM/SubTitle     : Scary Monsters (and Super Creeps)
    genre           : Drama;General;Series
    WM/OriginalReleaseTime: 0
    WM/MediaCredits : Piper Perabo/Christopher Gorham/Peter Gallagher/Anne Dudek/Kari Matchett;;;
    service_provider: USA
    service_name    : USA Network
    WM/MediaNetworkAffiliation: Satellite
    WM/MediaOriginalChannel: 35
    WM/MediaOriginalChannelSubNumber: 0
    WM/MediaOriginalBroadcastDateTime: 2012-11-06T06:00:00Z
    WM/MediaOriginalRunTime: 36583578040
    WM/MediaIsStereo: false
    WM/MediaIsRepeat: false
    WM/MediaIsLive  : false
    WM/MediaIsTape  : false
    WM/MediaIsDelay : false
    WM/MediaIsSubtitled: false
    WM/MediaIsMovie : false
    WM/MediaIsPremiere: false
    WM/MediaIsFinale: false
    WM/MediaIsSAP   : false
    WM/MediaIsSport : false
    WM/ParentalRating: TV-PG
    WM/Provider     : MediaCenterDefault
    WM/VideoClosedCaptioning: true
    WM/WMRVEncodeTime: 2012-11-07 03:00:01
    WM/WMRVSeriesUID: !MCSeries!236524124
    WM/WMRVServiceID: !MCService!28459373
    WM/WMRVProgramID: !MCProgram!281435509
    WM/WMRVRequestID: 0
    WM/WMRVScheduleItemID: 0
    WM/WMRVQuality  : 1
    WM/WMRVOriginalSoftPrePadding: 300
    WM/WMRVOriginalSoftPostPadding: 0
    WM/WMRVHardPrePadding: -300
    WM/WMRVHardPostPadding: 0
    WM/WMRVATSCContent: true
    WM/WMRVDTVContent: true
    WM/WMRVHDContent: false
    Duration        : 36586250864
    WM/WMRVEndTime  : 2012-11-07 04:01:00
    WM/WMRVBitrate  : 2.930237
    WM/WMRVKeepUntil: -1
    WM/WMRVActualSoftPrePadding: 298
    WM/WMRVActualSoftPostPadding: 0
    WM/WMRVContentProtected: false
    WM/WMRVContentProtectedPercent: 0
    WM/WMRVExpirationSpan: 9223372036854775807
    WM/WMRVInBandRatingSystem: 255
    WM/WMRVInBandRatingLevel: 255
    WM/WMRVInBandRatingAttributes: 0
    WM/WMRVWatched  : false
    WM/MediaThumbWidth: 352
    WM/MediaThumbHeight: 310
    WM/MediaThumbStride: 1056
    WM/MediaThumbRet: 0
    WM/MediaThumbRatingSystem: 9
    WM/MediaThumbRatingLevel: 10
    WM/MediaThumbRatingAttributes: 0
    WM/MediaThumbAspectRatioX: 4
    WM/MediaThumbAspectRatioY: 3
    WM/MediaThumbTimeStamp: 4644421659667696459
  Duration: 00:40:32.01, start: 12135.221998, bitrate: 6 kb/s
    Stream #0:0[0x30]: Subtitle: eia_608
    Stream #0:1[0x31]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
    Stream #0:2[0x32]: Audio: ac3, 0 channels, s16
    Stream #0:3[0x33]: Video: mpeg2video (Main), yuv420p, 544x480 [SAR 20:17 DAR 4:3], 29.97 fps, 29.97 tbr, 10000k tbn,
 59.94 tbc
    Stream #0:4[0x0]: Attachment: mjpeg
    Metadata:
      title           : TV Thumbnail
[mpegts @ 03f08520] sample rate not set
Output #0, mpegts, to 'out.ts':
  Metadata:
    WM/MediaClassPrimaryID: db9830bd-3ab3-4fab-8a371a995f7ff74
    WM/MediaClassSecondaryID: ba7f258a-62f7-47a9-b21f4651c42a000
    Title           : Covert Affairs
    WM/SubTitle     : Scary Monsters (and Super Creeps)
    genre           : Drama;General;Series
    WM/OriginalReleaseTime: 0
    WM/MediaCredits : Piper Perabo/Christopher Gorham/Peter Gallagher/Anne Dudek/Kari Matchett;;;
    service_provider: USA
    service_name    : USA Network
    WM/MediaNetworkAffiliation: Satellite
    WM/MediaOriginalChannel: 35
    WM/MediaOriginalChannelSubNumber: 0
    WM/MediaOriginalBroadcastDateTime: 2012-11-06T06:00:00Z
    WM/MediaOriginalRunTime: 36583578040
    WM/MediaIsStereo: false
    WM/MediaIsRepeat: false
    WM/MediaIsLive  : false
    WM/MediaIsTape  : false
    WM/MediaIsDelay : false
    WM/MediaIsSubtitled: false
    WM/MediaIsMovie : false
    WM/MediaIsPremiere: false
    WM/MediaIsFinale: false
    WM/MediaIsSAP   : false
    WM/MediaIsSport : false
    WM/ParentalRating: TV-PG
    WM/Provider     : MediaCenterDefault
    WM/VideoClosedCaptioning: true
    WM/WMRVEncodeTime: 2012-11-07 03:00:01
    WM/WMRVSeriesUID: !MCSeries!236524124
    WM/WMRVServiceID: !MCService!28459373
    WM/WMRVProgramID: !MCProgram!281435509
    WM/WMRVRequestID: 0
    WM/WMRVScheduleItemID: 0
    WM/WMRVQuality  : 1
    WM/WMRVOriginalSoftPrePadding: 300
    WM/WMRVOriginalSoftPostPadding: 0
    WM/WMRVHardPrePadding: -300
    WM/WMRVHardPostPadding: 0
    WM/WMRVATSCContent: true
    WM/WMRVDTVContent: true
    WM/WMRVHDContent: false
    Duration        : 36586250864
    WM/WMRVEndTime  : 2012-11-07 04:01:00
    WM/WMRVBitrate  : 2.930237
    WM/WMRVKeepUntil: -1
    WM/WMRVActualSoftPrePadding: 298
    WM/WMRVActualSoftPostPadding: 0
    WM/WMRVContentProtected: false
    WM/WMRVContentProtectedPercent: 0
    WM/WMRVExpirationSpan: 9223372036854775807
    WM/WMRVInBandRatingSystem: 255
    WM/WMRVInBandRatingLevel: 255
    WM/WMRVInBandRatingAttributes: 0
    WM/WMRVWatched  : false
    WM/MediaThumbWidth: 352
    WM/MediaThumbHeight: 310
    WM/MediaThumbStride: 1056
    WM/MediaThumbRet: 0
    WM/MediaThumbRatingSystem: 9
    WM/MediaThumbRatingLevel: 10
    WM/MediaThumbRatingAttributes: 0
    WM/MediaThumbAspectRatioX: 4
    WM/MediaThumbAspectRatioY: 3
    WM/MediaThumbTimeStamp: 4644421659667696459
    Stream #0:0: Audio: ac3, 48000 Hz, stereo, 192 kb/s
    Stream #0:1: Audio: ac3, 0 channels
Stream mapping:
  Stream #0:1 -> #0:0 (copy)
  Stream #0:2 -> #0:1 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

Ideally it should copy the stream, and if there is an issue then anyways it should not fail, maybe skip the stream

Attachments (2)

broken_remux.wtv​ (2.0 MB ) - added by ramitb 12 years ago.
WTV to TS copy Audio streams broken
zeroAudioChannel.ts​ (2.0 MB ) - added by ramitb 12 years ago.

Change History (10)

by ramitb, 12 years ago

Attachment: broken_remux.wtv​ added

WTV to TS copy Audio streams broken

comment:1 by Carl Eugen Hoyos, 12 years ago

Keywords: wtv ac3 added
Summary: FFMPEG not able to copy audio streams from WTV to TS → FFMPEG not able to copy empty audio stream in wtv
Version: unspecified → git-master

This is not necessarily a bug:
FFmpeg cannot copy streams that are detected but not correctly identified (like stream 0:1 in this case). The question is therefore: Is it a bug that the stream is detected (is there actually no stream)? Or is there any software that correctly identifies (plays) the second audio stream?

If there is a bug (in the wtv demuxer or the ac3 decoder) it is certainly not mpeg-ts related: You can reproduce the problem with the following command line:
$ ffmpeg -i broken_remux.wtv -map 0:2 -acodec copy out.ac3

comment:2 by ramitb, 12 years ago

Same issue

ffmpeg.x86.exe -i broken_remux.wtv -map 0:2 -acodec copy out.ac3

ffmpeg version N-46726-g2f74f8d Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 13 2012 19:29:51 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable
-bzlib --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroed
inger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52.  6.100 / 52.  6.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.100 /  3. 23.100
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[wtv @ 01edaf20] reported file length (0x4fd7094c) exceeds number of available sectors (0x40000000)
[mpeg2video @ 02cc5cc0] mpeg_decode_postinit() failure
    Last message repeated 18 times
[wtv @ 01edaf20] Could not find codec parameters for stream 2 (Audio: ac3, 0 channels, s16): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, wtv, from 'broken_remux.wtv':
  Metadata:
    WM/MediaClassPrimaryID: db9830bd-3ab3-4fab-8a371a995f7ff74
    WM/MediaClassSecondaryID: ba7f258a-62f7-47a9-b21f4651c42a000
    Title           : Covert Affairs
    WM/SubTitle     : Scary Monsters (and Super Creeps)
    genre           : Drama;General;Series
    WM/OriginalReleaseTime: 0
    WM/MediaCredits : Piper Perabo/Christopher Gorham/Peter Gallagher/Anne Dudek/Kari Matchett;;;
    service_provider: USA
    service_name    : USA Network
    WM/MediaNetworkAffiliation: Satellite
    WM/MediaOriginalChannel: 35
    WM/MediaOriginalChannelSubNumber: 0
    WM/MediaOriginalBroadcastDateTime: 2012-11-06T06:00:00Z
    WM/MediaOriginalRunTime: 36583578040
    WM/MediaIsStereo: false
    WM/MediaIsRepeat: false
    WM/MediaIsLive  : false
    WM/MediaIsTape  : false
    WM/MediaIsDelay : false
    WM/MediaIsSubtitled: false
    WM/MediaIsMovie : false
    WM/MediaIsPremiere: false
    WM/MediaIsFinale: false
    WM/MediaIsSAP   : false
    WM/MediaIsSport : false
    WM/ParentalRating: TV-PG
    WM/Provider     : MediaCenterDefault
    WM/VideoClosedCaptioning: true
    WM/WMRVEncodeTime: 2012-11-07 03:00:01
    WM/WMRVSeriesUID: !MCSeries!236524124
    WM/WMRVServiceID: !MCService!28459373
    WM/WMRVProgramID: !MCProgram!281435509
    WM/WMRVRequestID: 0
    WM/WMRVScheduleItemID: 0
    WM/WMRVQuality  : 1
    WM/WMRVOriginalSoftPrePadding: 300
    WM/WMRVOriginalSoftPostPadding: 0
    WM/WMRVHardPrePadding: -300
    WM/WMRVHardPostPadding: 0
    WM/WMRVATSCContent: true
    WM/WMRVDTVContent: true
    WM/WMRVHDContent: false
    Duration        : 36586250864
    WM/WMRVEndTime  : 2012-11-07 04:01:00
    WM/WMRVBitrate  : 2.930237
    WM/WMRVKeepUntil: -1
    WM/WMRVActualSoftPrePadding: 298
    WM/WMRVActualSoftPostPadding: 0
    WM/WMRVContentProtected: false
    WM/WMRVContentProtectedPercent: 0
    WM/WMRVExpirationSpan: 9223372036854775807
    WM/WMRVInBandRatingSystem: 255
    WM/WMRVInBandRatingLevel: 255
    WM/WMRVInBandRatingAttributes: 0
    WM/WMRVWatched  : false
    WM/MediaThumbWidth: 352
    WM/MediaThumbHeight: 310
    WM/MediaThumbStride: 1056
    WM/MediaThumbRet: 0
    WM/MediaThumbRatingSystem: 9
    WM/MediaThumbRatingLevel: 10
    WM/MediaThumbRatingAttributes: 0
    WM/MediaThumbAspectRatioX: 4
    WM/MediaThumbAspectRatioY: 3
    WM/MediaThumbTimeStamp: 4644421659667696459
  Duration: 00:40:32.01, start: 12135.221998, bitrate: 6 kb/s
    Stream #0:0[0x30]: Subtitle: eia_608
    Stream #0:1[0x31]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
    Stream #0:2[0x32]: Audio: ac3, 0 channels, s16
    Stream #0:3[0x33]: Video: mpeg2video (Main), yuv420p, 544x480 [SAR 20:17 DAR 4:3], 29.97 fps, 29.97 tbr, 10000k tbn,
 59.94 tbc
    Stream #0:4[0x0]: Attachment: mjpeg
    Metadata:
      title           : TV Thumbnail
[ac3 @ 03f98520] sample rate not set
Output #0, ac3, to 'out.ac3':
  Metadata:
    WM/MediaClassPrimaryID: db9830bd-3ab3-4fab-8a371a995f7ff74
    WM/MediaClassSecondaryID: ba7f258a-62f7-47a9-b21f4651c42a000
    Title           : Covert Affairs
    WM/SubTitle     : Scary Monsters (and Super Creeps)
    genre           : Drama;General;Series
    WM/OriginalReleaseTime: 0
    WM/MediaCredits : Piper Perabo/Christopher Gorham/Peter Gallagher/Anne Dudek/Kari Matchett;;;
    service_provider: USA
    service_name    : USA Network
    WM/MediaNetworkAffiliation: Satellite
    WM/MediaOriginalChannel: 35
    WM/MediaOriginalChannelSubNumber: 0
    WM/MediaOriginalBroadcastDateTime: 2012-11-06T06:00:00Z
    WM/MediaOriginalRunTime: 36583578040
    WM/MediaIsStereo: false
    WM/MediaIsRepeat: false
    WM/MediaIsLive  : false
    WM/MediaIsTape  : false
    WM/MediaIsDelay : false
    WM/MediaIsSubtitled: false
    WM/MediaIsMovie : false
    WM/MediaIsPremiere: false
    WM/MediaIsFinale: false
    WM/MediaIsSAP   : false
    WM/MediaIsSport : false
    WM/ParentalRating: TV-PG
    WM/Provider     : MediaCenterDefault
    WM/VideoClosedCaptioning: true
    WM/WMRVEncodeTime: 2012-11-07 03:00:01
    WM/WMRVSeriesUID: !MCSeries!236524124
    WM/WMRVServiceID: !MCService!28459373
    WM/WMRVProgramID: !MCProgram!281435509
    WM/WMRVRequestID: 0
    WM/WMRVScheduleItemID: 0
    WM/WMRVQuality  : 1
    WM/WMRVOriginalSoftPrePadding: 300
    WM/WMRVOriginalSoftPostPadding: 0
    WM/WMRVHardPrePadding: -300
    WM/WMRVHardPostPadding: 0
    WM/WMRVATSCContent: true
    WM/WMRVDTVContent: true
    WM/WMRVHDContent: false
    Duration        : 36586250864
    WM/WMRVEndTime  : 2012-11-07 04:01:00
    WM/WMRVBitrate  : 2.930237
    WM/WMRVKeepUntil: -1
    WM/WMRVActualSoftPrePadding: 298
    WM/WMRVActualSoftPostPadding: 0
    WM/WMRVContentProtected: false
    WM/WMRVContentProtectedPercent: 0
    WM/WMRVExpirationSpan: 9223372036854775807
    WM/WMRVInBandRatingSystem: 255
    WM/WMRVInBandRatingLevel: 255
    WM/WMRVInBandRatingAttributes: 0
    WM/WMRVWatched  : false
    WM/MediaThumbWidth: 352
    WM/MediaThumbHeight: 310
    WM/MediaThumbStride: 1056
    WM/MediaThumbRet: 0
    WM/MediaThumbRatingSystem: 9
    WM/MediaThumbRatingLevel: 10
    WM/MediaThumbRatingAttributes: 0
    WM/MediaThumbAspectRatioX: 4
    WM/MediaThumbAspectRatioY: 3
    WM/MediaThumbTimeStamp: 4644421659667696459
    Stream #0:0: Audio: ac3, 0 channels
Stream mapping:
  Stream #0:2 -> #0:0 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

comment:3 by pross, 12 years ago

Just to extend what cehoyos said. The second audio stream contains no data. There are no reliable flags in the WTV file format that indicate when a stream contains no data.

    Stream #0:2[0x32]: Audio: ac3, 0 channels, s16

This ticket should be recast as an suggested feature, i.e. give the user a warning when he/she attempts to manipulate a stream that is potentially empty.

comment:4 by ramitb, 12 years ago

Ideally it should not copy it, skip it - whether it chooses to show it or not is debatable, I would suggest since it doesn't exist it should not show it at all. Afterall if it doesn't exist it should just show an warning and move on as though it never existed and continue, but it shouldn't fail.

We can't control what *Microsoft* does but we can ensure that we don't fail where possible.

Version 0, edited 12 years ago by ramitb (next)

comment:5 by ramitb, 12 years ago

Folks - any thoughts on this? It's driving me crazy, I'm not able to convert files because ffmpeg keeps bugging out on Audio Tracks with zero channels.

I'm facing the same issue with TS files also - attaching a sample.
Very frustrating issue, I'm trying to cut a section of the video and it just bugs out because of this zero channel audio track.

There should be some way to continue the stream copy and not FAIL because of a invalid track. This isn't just a microsoft issue, it looks like other media recorders also also creating this zero track audio channel fro some reason.

Can FFMPEG throw a warning or put a flag like -ignoreInvalidTracks to skip over these channels?

Here's the output

ffmpeg -i zeroAudioChannel.ts -map 0:a -map 0:v -vcodec copy -acodec copy test-out.ts

ffmpeg version N-48065-g6375318 Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec 21 2012 09:06:30 with gcc 4.7.2 (GCC)
  configuration: --enable-static --arch=x86 --target-os=mingw32 --cross-prefix=/home/rdp/dev/ffmpeg-windows-build-helper
s/sandbox/mingw-w64-i686/bin/i686-w64-mingw32- --pkg-config=pkg-config --enable-gpl --enable-libx264 --enable-avisynth -
-enable-libxvid --enable-libmp3lame --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheo
ra --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-fontconfig --ena
ble-libass --enable-libutvideo --enable-libopus --disable-w32threads --enable-frei0r --enable-filter=frei0r --enable-lib
vo-aacenc --enable-bzlib --enable-libxavs --extra-cflags=-DPTW32_STATIC_LIB --enable-libopencore-amrnb --enable-libopenc
ore-amrwb --enable-libvo-amrwbenc --enable-libschroedinger --enable-libbluray --enable-libvpx --enable-runtime-cpudetect

  libavutil      52. 12.100 / 52. 12.100
  libavcodec     54. 81.100 / 54. 81.100
  libavformat    54. 49.102 / 54. 49.102
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 29.100 /  3. 29.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[mpegts @ 01e1c920] PES packet size mismatch
    Last message repeated 1 times
[mpeg2video @ 01e1d0e0] mpeg_decode_postinit() failure
    Last message repeated 2 times
[mp1 @ 02ccace0] Header missing
[mpeg2video @ 01e1d0e0] mpeg_decode_postinit() failure
    Last message repeated 3 times
[mp1 @ 02ccace0] Header missing
[mpeg2video @ 01e1d0e0] mpeg_decode_postinit() failure
    Last message repeated 3 times
[mp1 @ 02ccace0] Header missing
[mpeg2video @ 01e1d0e0] mpeg_decode_postinit() failure
    Last message repeated 2 times
[mp1 @ 02ccace0] Header missing
    Last message repeated 3 times
[mpegts @ 01e1c920] Could not find codec parameters for stream 3 (Unknown: none (TVG1 / 0x31475654)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 01e1c920] decoding for stream 4 failed
[mpegts @ 01e1c920] Could not find codec parameters for stream 4 (Audio: mp1 ([6][0][0][0] / 0x0006), 0 channels, s16p):
 unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[NULL @ 02cca4e0] start time is not set in estimate_timings_from_pts
[NULL @ 02ccace0] start time is not set in estimate_timings_from_pts
[mpegts @ 01e1c920] PES packet size mismatch
Input #0, mpegts, from 'zeroAudioChannel.ts':
  Duration: 00:00:01.26, start: 93213.317522, bitrate: 13338 kb/s
  Program 1
    Stream #0:0[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fp
s, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x33](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Stream #0:2[0x34](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
    Stream #0:3[0x111]: Unknown: none (TVG1 / 0x31475654)
    Stream #0:4[0x110]: Audio: mp1 ([6][0][0][0] / 0x0006), 0 channels, s16p
[mpegts @ 0398e020] sample rate not set
Output #0, mpegts, to 'test-out.ts':
    Stream #0:0(eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), 384 kb/s
    Stream #0:1(eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, 192 kb/s
    Stream #0:2: Audio: mp1 ([6][0][0][0] / 0x0006), 0 channels
    Stream #0:3: Video: mpeg2video ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 90
k tbn, 29.97 tbc
Stream mapping:
  Stream #0:1 -> #0:0 (copy)
  Stream #0:2 -> #0:1 (copy)
  Stream #0:4 -> #0:2 (copy)
  Stream #0:0 -> #0:3 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

by ramitb, 12 years ago

Attachment: zeroAudioChannel.ts​ added

comment:6 by ramitb, 12 years ago

@peter ross - any thoughts on this?

comment:7 by pross, 11 years ago

Keywords: ffmpeg ts added
Summary: FFMPEG not able to copy empty audio stream in wtv → ffmpeg: warn user when attemping to manipulate stream that is potentially empty
Type: defect → enhancement

There is no way for the wtvdec to detect "empty streams" reliably.

In your workflow, I suggest you use ffprobe to detect the presence of potientially empty streams, and filter them out using -map.

comment:8 by Carl Eugen Hoyos, 11 years ago

Component: undetermined → FFmpeg
Keywords: ffmpeg ts removed
Resolution: → invalid
Status: new → closed

Afaict, there is no issue: FFmpeg does not just "warn" about a stream that cannot be manipulated, it prints an error.
Remember that -map 0 does not work the way you imagine it / the option cannot read minds.

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