[MPlayer-users] Avoiding A-V problems

Mon Sep 27 10:33:12 CEST 2010

>> [mplayer SVN rev 32106]
>>
>> I have an AVI video which is played perfectly by mplayer.  For
>> editing (avidemux can't process the original video), I try to
>> convert it to a raw format, however, I always experience A-V delays
>> which are zero at the beginning of the output file get larger if I
>> skip towards the end of the video.
>
> [...]
>
> You could try adding -ofps <desired fps> to the command line and see
> if that fixes it.

Unfortunately, it doesn't.  I tried

  mencoder in.avi \
           -o out.avi \
           -vf harddup \
           -ofps 25 \
           -ovc raw \
           -oac pcm

and A-V still gets more and more out of sync at the end of the video
(approx. 3/10s after about 40min).

Admittedly, I have no idea how mplayer and mencoder work internally.
For my particular case, I don't need any meta-information which might
be in the AVI data stream; I would be glad if I could simply capture
the (perfect) mplayer output as raw video and audio.  Is this
possible?  I could imagine that capturing a perfect replay should
produce a perfect video ...

For your information, below is what I see during encoding and replay
of the created videos (using the above command line switches for
mencoder and no switches for mplayer).  Maybe it helps to find a
possible mistake I've done.

    Werner

======================================================================

MEncoder UNKNOWN-4.5 (C) 2000-2010 MPlayer Team
success: format: 0  data: 0x0 - 0x3a3f3200
AVI file format detected.
AVI: ODML: Building ODML index (1 superindexchunks).
AVI_NI: No video stream found.
Seek failed
libavformat file format detected.
[avi @ 0x905f110] Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: video (dvvideo), -vid 0
[lavf] stream 1: audio (pcm_s16le), -aid 0
VIDEO:  [dvsd]  720x576  0bpp  25.000 fps  28800.0 kbps (3515.6 kbyte/s)
[V] filefmt:35  fourcc:0x64737664  size:720x576  fps:25.000  ftime:=0.0400
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 48000 Hz, 2 ch, s16le, 1536.0 kbit/100.00% (ratio: 192000->192000)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [harddup]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffdv] vfm: ffmpeg (FFmpeg DV)
==========================================================================
Movie-Aspect is 1.37:1 - prescaling to correct movie aspect.
Writing header...
ODML: vprp aspect is 16384:12006.
Pos:  68.2s   1704f ( 2%) 27.73fps Trem:  38min 39285mb  A-V:0.051 [124416:1536]
ODML: Starting new RIFF chunk at 1023MB.
Pos: 136.4s   3409f ( 5%) 27.15fps Trem:  38min 39596mb  A-V:0.051 [124415:1536]
ODML: Starting new RIFF chunk at 2047MB.

[...]

Pos:2591.0s  64776f (97%) 26.60fps Trem:   0min 39784mb  A-V:0.051 [124416:1536]
ODML: Starting new RIFF chunk at 38904MB.
Pos:2650.2s  66256f (100%) 26.58fps Trem:   0min 39792mb  A-V:0.042 [124416:1536]
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=68
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=74
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=71
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=76
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=79
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=75
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=68
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=72
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=78
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=84
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=72
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=93
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=68
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=76
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=68
[dvvideo @ 0x895d960]AC EOB marker is absent pos=70
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=66
[dvvideo @ 0x895d960]AC EOB marker is absent pos=65
[dvvideo @ 0x895d960]AC EOB marker is absent pos=67
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
[dvvideo @ 0x895d960]AC EOB marker is absent pos=72
[dvvideo @ 0x895d960]AC EOB marker is absent pos=64
Pos:2650.3s  66257f (100%) 26.58fps Trem:   0min 39793mb  A-V:0.041 [124416:1536]

Flushing video frames.
Writing index...
Writing header...
ODML: vprp aspect is 16384:12006.

Video stream: 124416.000 kbit/s  (15551999 B/s)
  size: 41217154560 bytes  2650.280 secs  66257 frames

Audio stream: 1536.000 kbit/s  (192000 B/s)
  size: 508830812 bytes  2650.160 secs

-------

MPlayer UNKNOWN-4.5 (C) 2000-2010 MPlayer Team

Playing Videokamera links Teil 1.neu.avi.
AVI file format detected.
[aviheader] Video stream found, -vid 0
[aviheader] Audio stream found, -aid 1
AVI: ODML: Building ODML index (2 superindexchunks).
VIDEO:  [YV12]  720x576  12bpp  25.000 fps  124416.0 kbps (15187.5 kbyte/s)
Clip info:
 Software: MEncoder UNKNOWN-4.5
Xlib:  extension "NV-GLX" missing on display ":0".
[vdpau] Error when calling vdp_device_create_x11: 1
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Movie-Aspect is 1.36:1 - prescaling to correct movie aspect.
VO: [xv] 720x576 => 786x576 Planar YV12
Selected video codec: [rawyv12] vfm: raw (RAW YV12)
==========================================================================
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 48000 Hz, 2 ch, s16le, 1536.0 kbit/100.00% (ratio: 192000->192000)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
A:   1.2 V:   0.3 A-V:  0.964 ct:  0.000   8/  8 ??% ??% ??,?% 7 0

Badly interleaved AVI file detected - switching to -ni mode...
A:2596.2 V:2596.2 A-V:  0.000 ct:  0.000 64906/64906  0%  1% 46.9% 7 0

[...]

Exiting... (Quit)