aac in flv: Application provided invalid, non monotonically increasing dts to muxer in stream

[burek]

Hi,

I have a FLV file, saved with VLC player and no matter what I try to do with that FLV file, I get the same error:

[flv @ 0x123edc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 325 >= 298
av_interleaved_write_frame(): Invalid argument

The file can be downloaded from here (30 mb): ​http://ffmpeg.test-lab.ch/uploads/nonmonotonic.flv

And here is the log of the output:

# ffmpeg -i nonmonotonic.flv -acodec copy -vcodec copy out.flv
ffmpeg version N-34326-gf955fdc, Copyright (c) 2000-2011 the FFmpeg developers
  built on Nov  1 2011 15:12:14 with gcc 4.6.1
  configuration: --enable-static --enable-shared --enable-gpl --enable-nonfree --enable-postproc --enable-libx264 --enable-libaacplus
  libavutil    51. 22. 0 / 51. 22. 0
  libavcodec   53. 26. 0 / 53. 26. 0
  libavformat  53. 18. 0 / 53. 18. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 45. 3 /  2. 45. 3
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[flv @ 0x1237760] max_analyze_duration 5000000 reached at 5014000

Seems stream 0 codec frame rate differs from container frame rate: 48.00 (48/1) -> 24.00 (48/2)
Input #0, flv, from 'nonmonotonic.flv':
  Metadata:
    encoder         : Lavf53.18.0
  Duration: 00:15:00.11, start: 0.000000, bitrate: 316 kb/s
    Stream #0:0: Video: h264 (High), yuv420p, 320x240, 24 tbr, 1k tbn, 48 tbc
    Stream #0:1: Audio: aac, 44100 Hz, mono, s16
Output #0, flv, to 'out.flv':
  Metadata:
    encoder         : Lavf53.18.0
    Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 320x240, q=2-31, 1k tbn, 1k tbc
    Stream #0:1: Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, mono
Stream mapping:
  Stream #0.0 -> #0.0 (copy)
  Stream #0.1 -> #0.1 (copy)
Press [q] to stop, [?] for help
[flv @ 0x123edc0] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 325 >= 298
av_interleaved_write_frame(): Invalid argument

[Carl Eugen Hoyos]

$ ffmpeg -i nonmonotonic_cut.flv -acodec copy -vn out.flv
ffmpeg version N-34342-g971e710, Copyright (c) 2000-2011 the FFmpeg developers
  built on Nov  2 2011 11:09:57 with gcc 4.5.3
  configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
  libavutil    51. 22. 0 / 51. 22. 0
  libavcodec   53. 26. 0 / 53. 26. 0
  libavformat  53. 18. 0 / 53. 18. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 45. 3 /  2. 45. 3
  libswscale    2.  1. 0 /  2.  1. 0

Seems stream 0 codec frame rate differs from container frame rate: 48.00 (48/1) -> 0.08 (1/12)
Input #0, flv, from 'nonmonotonic_cut.flv':
  Metadata:
    encoder         : Lavf53.18.0
  Duration: 00:15:00.07, start: 0.007000, bitrate: 9 kb/s
    Stream #0:0: Video: h264 (High), yuv420p, 320x240, 0.08 tbr, 1k tbn, 48 tbc
    Stream #0:1: Audio: aac, 44100 Hz, mono, s16
Output #0, flv, to 'out.flv':
  Metadata:
    encoder         : Lavf53.18.0
    Stream #0:0: Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, mono
Stream mapping:
  Stream #0.1 -> #0.0 (copy)
Press [q] to stop, [?] for help
[flv @ 0x1397ac0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 517 >= 500
av_interleaved_write_frame(): Invalid argument

[reimar]

I proposed a patch adding -async -1 that would allow working around this issue. But there is something strange with the audio time stamps in this file.
Note that the error is different though in latest FFmpeg.

[Carl Eugen Hoyos]

Remuxing works with current git head.