[vdr] FF card A/V sync suggestion

whoMAN whoman at gmail.com
Fri Nov 3 18:52:05 CET 2006

I'm not sure if it's been answered yet, but I thought I'd throw this out:

mplayer uses either LAVC or FAME [depending on how mplayer was
compiled/configured] to convert EVERYTHING to MPEG1 before it is sent to the
DVB Device.  In essence, it transcodes in realtime.

Not too efficient, but since transcoding to MPEG 1 takes little resources,
most people probably don't notice.

I know it's probably what most of you didn't want to hear, but I figured you
guys would want to know.


On 11/3/06, VDR User <user.vdr at gmail.com> wrote:
> I joined the mplayer mailing list and have tried to seek help/information
> from those nice folks..  The following is part of one of my exchanges.
> Maybe the part about the timestamp may be of some help?
> > I asked a couple specific questions and included some quotes from other
> > posts to provide an idea of what we're looking at as the cause.  I can't
> > tell you what the exact problem is because we're still trying to figure
> that
> > out...  And a good place to start is by comparing the differences
> between
> > the software that has the problem and software that doesn't.  We're
> > trying to figure out what mplayer does, if anything, with regards to
> > repacking, the pes layer, pcr data, etc. during the "playback" of a VDR
> "recording".
> nothing particular: the pes packetization is as standard as you can get,
> except that IIRC there's a timestamp on every single frame,
> rather than once every 0.5-0.7 seconds; this fact alone can make a
> lot of difference during playback.
> Does the desync that you are experiencing get worse with time or does
> it regularly decrease and next increase?
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