[FFmpeg-cvslog] r21033 - trunk/doc/faq.texi

[Diego Biurrun]

On Wed, Jan 06, 2010 at 04:34:27PM +0100, Reimar D?ffinger wrote:
> On Wed, Jan 06, 2010 at 02:49:31PM +0100, diego wrote:
> > 
> > Log:
> > Fix entry on concatenating multiple yuv4mpegpipe streams.
> > patch by John Van Sickle, john.vansickle gmail com
> > 
> > --- trunk/doc/faq.texi	Tue Jan  5 21:14:50 2010	(r21032)
> > +++ trunk/doc/faq.texi	Wed Jan  6 14:49:31 2010	(r21033)
> > @@ -316,6 +316,11 @@ ffmpeg -f mpeg -i - -sameq -vcodec mpeg4
> >  
> >  Similarly, the yuv4mpegpipe format, and the raw video, raw audio codecs also
> >  allow concatenation, and the transcoding step is almost lossless.
> > +When using multiple yuv4mpegpipe(s), the first line needs to be discarded
> > +from all but the first stream. This can be accomplished by piping through
> > + at code{tail} as seen below. Note that when piping through @code{tail} you
> > +must use command grouping, @code{@{  ;@}}, to background properly.
> 
> I think it should be no problem to support YUV4MPEG files with multiple "header"
> lines, which I think is necessary to support decoding of files with resolution changes
> to YUV4MPEG.
> I admit this probably will need a few more changes, and it is against what I have seen
> as YUV4MPEG "specification", but do you think that this would be a good thing and probably
> be accepted?

If this question was addressed to me, I have no idea.  I specifically
asked for somebody to verify the correctness of the patch before
applying it because I know more about farming potatoes than yuv4mpeg...

Diego