On Wednesday 12 July 2006 21:36, Benjamin Zores wrote:
> On Wed, 12 Jul 2006 11:29:47 -0700 (PDT)
>
> kevin thayer <[EMAIL PROTECTED]> wrote:
> > > 2. I do have a problem with decoder filling.
> > >
> > > It seems from my tests that the decode needs
> > > something like 80 MPEG frames before being
> > > able to display a single picture. As a result,
> > > MPlayer renders a stream with desyncronized A-V.
> > >
> > > >From MPlayer view, audio and video packets are
> > >
> > > synced but the problem is that audio packets are
> > > played immediately when decoded while video packets
> > > are displayed with a 80 frames delay.
> >
> > I noticed the same thing, generally it takes about 3
> > seconds before it starts decoding (which would be 90
> > frames.. so i'm sure we're talking about the same
> > thing)
>
> Well i'm in PAL so 3*25 fps but agree that it sounds like 3 seconds.
>
> > Feel free to ask if you have other questions, and i'll
> > help if i can.
>
> Isn't there any way to control audio output at all ?
> I see V4L2 ioctl to get/set/enum video inputs, get/set/enum video
> outputs, get/set/enum audio inputs but nothing about audio outputs.
> Am I missing something ?
There are also ioctls to enumerate audio outputs, but there is only one.
The sound on the audio out of the PVR350 is output by the MPEG decoder
of the card. There is no way of feeding it a separate audio
uncompressed (or compressed for that matter) stream. You give it a MPEG
program stream (I'm not even sure if it can handle a transport stream)
and it will demultiplex and uncompress it and put the audio on the
audio out connector.
Hans
>
> I wrote a audio mpeg-pes writer for mplayer too and it seems to work
> but can't hear any sound. (never been able to hear anything from it
> in fact, when i "cat" a pes file it doesn't even show video either).
>
> Btw i'm using PVR-350.
>
> Ben
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