[FFmpeg-trac] #4042(undetermined:reopened): Broken console output when transcoding (broken) MEncoder files (was: ffmpeg is not able to convert mp2 audio)

FFmpeg trac at avcodec.org
Sun Oct 19 15:04:11 CEST 2014


#4042: Broken console output when transcoding (broken) MEncoder files
-------------------------------------+-------------------------------------
             Reporter:  f_rush       |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  minor        |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * priority:  normal => minor
 * status:  closed => reopened
 * version:  2.4.2 => git-master
 * resolution:  invalid =>


Comment:

 When transcoding (broken) avi files made with current MEncoder, FFmpeg
 shows completely wrong time information for the audio track. The attached
 sample is fifteen seconds long.
 {{{
 $ ffmpeg -i mencoder.avi out.mp2
 ffmpeg version N-67022-g69071e8 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Oct 19 2014 14:53:44 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 10.100 / 54. 10.100
   libavcodec     56.  8.102 / 56.  8.102
   libavformat    56.  9.101 / 56.  9.101
   libavdevice    56.  1.100 / 56.  1.100
   libavfilter     5.  1.106 /  5.  1.106
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 [avi @ 0x2d77d20] non-interleaved AVI
 Input #0, avi, from 'mencoder.avi':
   Metadata:
     encoder         : MEncoder SVN-r37259-4.7
   Duration: 00:00:15.03, start: 0.000000, bitrate: 933 kb/s
     Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 695 kb/s, 30 fps, 30 tbr, 30 tbn, 30
 tbc
     Stream #0:1: Audio: mp2 (P[0][0][0] / 0x0050), 44100 Hz, mono, s16p,
 224 kb/s
 Output #0, mp2, to 'out.mp2':
   Metadata:
     encoder         : Lavf56.9.101
     Stream #0:0: Audio: mp2, 44100 Hz, mono, s16, 384 kb/s
     Metadata:
       encoder         : Lavc56.8.102 mp2
 Stream mapping:
   Stream #0:1 -> #0:0 (mp2 (native) -> mp2 (native))
 Press [q] to stop, [?] for help
 size=     704kB time=03:02:47.26 bitrate=   0.5kbits/s
 video:0kB audio:704kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000000%
 }}}
 The output file is fifteen seconds long and plays fine.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4042#comment:8>
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