[vdr] Re: Cutting problems?

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

On Wed, Feb 05, 2003 at 06:32:24PM +0100, Wolfgang Fritz wrote:
> >
> >Nevertheless, on replaying there are _sometimes_ some distortions
> >visible (`Kloetzchen') and audio sometimes gives sharp noise.
> 
> I demuxed a vdr file with distortions using ds.jar. Playing the 
> resulting mpeg video file alone with mplayer does not show the 
> distortions. It seems  the audio discontinuity confuses the players.

The player is simply the ARM on the DVB-S card.

> 
> >Whereas if tosvcd uses marks.vdr to do a svcd image using
> 
> I will try a similar approach with ds.jar which is supposed to support 
> cutting too. Does tosvcd place the cuts at _exactly_ the same position 
> as vdr? I am trying to place the cuts at the best possible position with 
> vdr and would like to keep that position.

AFAICS

> 
> Nevertheless, ds.jar compensates the missing audio frames by inserting 
> "silence" at the cuts which I can live with because the cuts often are 
> at scene boundaries.

That's an approach which could also done by VDR beside recalculating
the PTS after a/the cut mark/marks.

> >mpeg2enc this seems not to happen.  mpeg2enc seems reorder the
> >PTS and recalculates sync offset of the audio part.
> >
> IIRC tosvcd has (or had) problems with _already cutted_ recordings, 
> maybe it does not recover from the audio dicontinuities as good as ds.jar

Doesn't mean _already cutted_ there is no information about the missed a/v
frames between the marks ??

      Werner


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