[MPlayer-users] A/V-Sync problem when playing from stdin.

D Richard Felker III dalias at aerifal.cx
Tue Feb 18 05:31:18 CET 2003


On Tue, Feb 18, 2003 at 12:16:50AM +0100, Josef Wolf wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> On Mon, Feb 17, 2003 at 09:29:48AM +0100, Arpi wrote:
> > > On Sun, Feb 16, 2003 at 08:07:45PM +0100, Josef Wolf wrote:
> > > 
> > > > I've noticed a A/V-sync problem when I play mpeg files from stdin.
> > > > "cat x.mpg | mplayer -" plays the sound about 0.5 sec too late. When
> > > > I play the same file with "mplayer x.mpg" or "mplayer - <x.mpg" it is
> > > > syncronized properly.
> > > > 
> > > > Is this a known problem?
> > > 
> > > I forgot to mention the version: 0.90-rc4
> > 
> > upload sample file and (.txt) description
> 
> Since I have no simple way to upload a file, I tried to find
> a file with this effect on your server. And I found that they
> _all_ fail _completely_ to play the video when they are played
> like "cat foo.mpg|mplayer -". However, they play fine with
> "mplayer - <foo.mpg". Check Alien.mpg just as an example. I
> think the problem is that pipes are not seekable.

Hmm, good point. Then use "cat foo.mpg | mplayer -cache 4096 -".

Rich




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