[mythtv] transcoding with cutlist

Geoffrey Hausheer ou401cru02 at sneakemail.com
Mon Aug 11 14:58:11 EDT 2003

On 11 Aug 2003 19:37:37 +0200, "Martin Moeller martin-at-martinm-76.dk
|mythtv/1.0-Allow|" <mvx1hgfxer0t at sneakemail.com> said:
> My CVS version is 1-2 weeks old presently, but I have seen this happen
> for about a month or two, I think. I just never really gave it much
> thought. Actually, I'm not totally sure about the last cutpoint but it
> definately doesn't cut all it should from the end of the recording...

This should all be fixed with my latest transcoding patches.
> I guess the comments earlier on about mythtranscoder breaking mencoder
> explains some of my problems but I also have problems with mplayer quite
> often now. It seems to only happen on channels that have subtitle
> information, though.
I haven't worked with subtitles at all.  i have no idea how the
transcoder will handle them.  If you have a nuv, I can look into making
it work, but as for mplayer...that's not really my area of expertise.

> I wonder how much work it would be to do either of the following:
> 1) Add an option to skip text frames on reencoding. I'm not quite sure
> if they are the problem or not and allegedly the 'patch to the patch'
> that Ken fashioned ought to make it not a problem, but...
I could do this, but I don't think it is a good idea.  It would just be a
hack.  better to fix the mplayer patch, or mythtranscode if it is doing
something wrong.

> 2) Transcode directly to DivX/Xvid .avi files (i.e. skipping all the
> mythtv specific stuff. Basically what mencoder would do it it wasn't
> broken.
This is difficult.  It would involve really nasty things, and Isaac has
said many times he's not interested in it.  It isn't impossible, but I
won't work on it anymore.

The option I was hoping for would be to use mythtranscode to decode raw
frames, and then stream those directly to mencoder.  I haven't found a
raw format (no header/sync frames) that mencoder will take as input, so
haven't pursued this.  This would mean mencoder wouldn't need to know nuv
format, so it'd be nice, but again, I'm not pursuing it any further.  If
someone knows of a way to get mencoder to take streaming input, I'd be
willing to do the mythtranscode part.

> I can put up a test .nuv file if you would like something to try out on
> :)
As I said, if there is a problem with mythtranscode (i.e. transcoded
files won't play in myth), I'll be happy to look at it.

  Geoffrey Hausheer

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