Re: [Dvdauthor-users] cell vs chapters [revisited]

[Wolfgang W. <wol...@we...>]

Am Montag, 15. Januar 2007 15:38 schrieb Altair IV:
> Paolo Ulivi wrote:
> > In the meantime, I developed a method to create empty vobs with exactly
> > one frame audio and one frame video, which uses transcode and ffmpeg,
> > so it can be used by people who needs AC3 audio, and can be used to
> > create static menus too. I'll send it to the list if you think it can be
> > useful and/or you are interested in evaluating it, it is been of great
> > help to me.
>
> I'd certainly like to know how to do this.  I've tried in the past to make
> blank videos with transcode and had a great deal of trouble doing so.  It'd
> be nice to have an easy way to make such things.

Here's how you create an mpeg video stream of 1 frame length in PAL:

convert -size 720x576 xc:transparent -depth 8 ppm:- | \
ppmtoy4m -S 420mpeg2 -n 1 -F 25:1 -r /dev/stdin | \
mpeg2enc -a 2 -n p -f 8 -o empty.m2v 

Adjust "-size", "-F" and "-n" to your needs, if using NTSC.

Mux this together with a silent ac3 stream and you're done.

convert is part of ImageMagick and ppmtoy4m and mpeg2enc are part of 
mjpegtools (in case you didn't know...). No need for transcode here...

hth
Wolfgang


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Geek by nature - Linux by choice