[MPlayer-users] trouble with a52/ac3

[Ryan Olf]

Thanks for the suggestions.  I'm fairly sure, though that the crashing is 
defintely audio related.  When I run mplayer -ac null, the video runs fine 
indefinitely, both with ffmpeg and default vfm.

As far as the lavf demuxer is concerned, and maybe this should be another 
thread:  when attempting to open a dvb:// stream, mplayer fails with (before 
anything displays):
--------------------
MPlayer dev-CVS-051130-13:28-3.4.4 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon 64 Newcastle,Winchester,San Diego,Venice; 
Sempron Palermo (Family: 15, Stepping: 0)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2

Playing dvb://KRON-SD.
code taken from dvbstream for mplayer v0.4pre1 - (C) Dave Chapman 2001
Released under the GPL.
Latest version available from http://www.linuxstb.org/
dvb_tune Freq: 731028615
libavformat file format detected.
LAVF_header: av_open_input_stream() failed

Exiting... (End of file)
---------------------
This is the case with the CVS and gentoo versions.  When opening the .ts file, 
it opens the video, but the video runs really fast (audio is normal):
---------------------
Playing file.ts.
libavformat file format detected.
VIDEO:  [mpg2]  704x480  0bpp  90000.000 fps  4300.0 kbps (524.9 kbyte/s)
----------------------
notice the insane fps.

Should I open another thread ont he lavf issue?  Any more ideas?  I'm 
wondering if maybe my capture card is damaged.  I might try it under windows 
to check.  Also, I'mg etting a better antenna soon, which may clean up the 
audio stream, which probably, as you said, has trouble.  Still, why does it 
kill the video stream?

Ryan

On Thursday 01 December 2005 07:15 am, RC wrote:
> On Wed, 30 Nov 2005 14:07:56 -0800
>
> Ryan Olf <ryan at efrus.com> wrote:
> > I have put two samples online, one where I
> > experience the errors (though I have not included enough of it that it
> > fails  entirely)
>
> It seems very likely to be a simple case of a damaged stream, and not a
> bug a mplayer so much as it is not very good at error recovery.
>
> At this point, it looks like your getting a crash because libmpeg2 isn't
> handling the errors well (the ac3 errors seem unrelated).
>
> "-vfm ffmpeg" should stop it crashing, and probably show less visual
> glitches as well.
>
> I believe the lavf ts demuxer is a bit better than the default, so
> "-demuxer 35" (or "-demuxer lavf" for CVS) should also improve the
> situation a bit more.
>
> Hopefully, that will solve your problem.
>
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