[Mplayer-dvb] audio and video out of sync :-(

[mocm at convergence.de]

Arpi writes:
 > Hi,
 > 
 > > First of all I need to say that I was damn amazed by your work when I first
 > > got MPlayer runnin with my Hauppauge WinDVB-s. Incredible how good
 > > exspecially those VCDs look on the TV-screen. But anyway, I'm still
 > > experiencing some problems with audio.
 > > 
 > > So here is what I did
 > > I got the lastest CVS-tree from MPlayer,ffmpeg and DVB-s driver. I compiled
 > > and installed ffmpeg and DVB-s driver. Then I compiled MPlayer following the
 > > steps described in DOCS/DVB. It compiled fine. So I started it, but soon I
 > > noticed the video and audio were out of sync. Audio is always say between 1
 > > and 1.5 secs ahead, although the "console-output" of mplayer says that it's
 > > perfectly synced:
 > > 
 > > A:   1.5 V:   1.5 A-V:  0.013 ct: -0.029   28/ 29   0%  0%  2.5% 1 0 0%
 > > 
 > > This only occurs when I'm runnin mplayer with "-vo mpegpes -vc mpegpes"
 > 
 > Hmm. I thought it's already fixed (i did some changes for dvb in av sync),
 > but if you're using cvs, then it's still buggy. Btw, did you tried mpegs
 > with different bitrate? As I can't get the actual video time delay of DVB
 > card, i have to estimate it from bitrate. Maybe it's buggy in mpeg header.
 > 

Why don't you send the sound to the DVB card, either as MPEG or as
LPCM. You can set the PTS and the card should sync it.


 > > When I'm havin mplayer output the movie via SDL or XV audio and video are
 > > perfectly sync.
 > > 
 > > I tried to play around with -delay option but without any success. 
 > Yes, It doesn't work because of the blocking "side-effect" of DVB.
 > 
 > > Any idea what's goin on here ?
 > Give me some time, i'll check.
 > 
 > Btw, I've some unfinished code for -ao mpegpes, to playback audio via the
 > dvb card. It will be finished soon, but unfortunately I'm very busy nowdays
 > with my job :(
 > It should solve the perfect a-v sync problem, at leats it moves the a-v sync
 > function into the driver/card.
 > 
 > 

Oops, I was typing too fast. If you need any help, tell me. 

Marcus

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Dr. Marcus Metzler                             
mocm at netcologne.de                     http://www.metzlerbros.de
mocm at convergence.de                    http://www.convergence.de

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