[vdr] Re: bitstreamout-0.48pre2

["Dr. Werner Fink" <werner@suse.de>]

On Thu, Oct 23, 2003 at 07:55:28PM +0200, Marcel Wiesweg wrote:
> >
> > The problem is: AFAIK if you receive the TS stream of
> > the video data of the current channel you loose live TV.
> 
> As I understand it you cannot do perfect sync in software because only the 
> MPEG decoder knows exactly when it displays the video.
> We see that it is possible to sync AC3 well enough - I don't use bitstreamout 
> but I think you are satisfied - but in the end it depends on an initial delay 
> and counting the audio data that arrives and that is processed, but you can 
> never know the _exact_ PTS of the video currently displayed?

Yep ... this is _exactly_ the problem.  The only real solution
would be something like a trigger from the driver/firmware its
self upto the user space process which is waiting on that.
This would be a system call similar to select but has to be
done in RT.


      Werner


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