[MPlayer-users] Bug: lost audio frames

[DdCJ]

System information:
  Linux distribution: Debian GNU (testing distribution)
  Kernel version: 2.4.21
  libc version: 2.3.2
  X version: XFree86 4.3.0
  gcc 2.95 and ld 2.14.90.0.6
  binutils 2.14.90.0.6
Hardware information:
  CPU info:
    processor       : 0
    vendor_id       : GenuineIntel
    cpu family      : 5
    model           : 2
    model name      : Pentium 75 - 200
    stepping        : 12
    cpu MHz         : 132.633
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : yes
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 1
    wp              : yes
    flags           : fpu vme de pse tsc msr mce cx8
    bogomips        : 264.60
  Video card: ATI Mach64 with 1 MB RAM
  Video driver: X built-in modular driver version 6.4.18
                X server for Mach64 version 3.3.6a
  Sound card: Aztech Sound Galaxy Washington with kernel OSS drivers
---------------------------------------------------------------------
Hello!
This problem occurs on many free players for Linux.
Some audio frames of mpeg files are not decompressed.

Here are some ways to see the problem:
Consider audio with 44.1 ksamples/sec stereo.
* On mp3 file:
  Play the file with mpg123:
  $ mpg123 -w file1.wav file.mp3
  Now play the same file with mplayer:
  $ mplayer -ao pcm -aofile file2.wav file.mp3
  By comparing the sizes of the wav files, you can see that the
file2.wav is lacking 2*1152 pcm samples (two mpeg audio frames),
if you used mp3lib (one frame with ffmpeg).
  A lack happen also when I dump audio from mp3:
  $ mplayer -dumpaudio file.mp3
  The same mp3 file is given, but without the first frame.

* On mpeg system file:
  Dump the audio from the file and play it with mpg123:
  $ mplayer -dumpaudio file.mpeg; mpg123 -w file1.wav stream.dump
  Play the file with mplayer:
  $ mplayer -vo null -vc dummy -ao pcm -aofile file2.wav file.mpeg
  Compare the size of the wav files (on my system the file2.wav is
lacking 1152, or 2*1152 on some files, and I used mp3lib)
  If I use ffmpeg, the problem only happen on some files.

* On avi file with mp3 audio:
  Do the same thing done with mpeg system files.
  The problem doesn't happen when I use mp3acm codec and sometimes
with the ffmp3 codec.

I tested with asf with wma files too. Some samples also are lacked
when I play the files.  I compared the wav files produced by mplayer
and by a windows program called Goldwave, which uses code from
micro$oft.
The files produced by goldwave are bigger.

And at last, I would like to know how to activate the l3codecx.ax
dshow codec, distributed with win32codecs.tar.bz2, in codecs.conf.

Thanks.

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