[FFmpeg-devel] [PATCH][RFC] variable frame sizes

Michael Niedermayer michaelni
Sat May 16 04:46:14 CEST 2009


On Fri, May 15, 2009 at 04:44:14PM -0700, Eric Buehl wrote:
> On Fri, May 15, 2009 at 3:49 AM, Michael Niedermayer <michaelni at gmx.at>wrote:
> 
> > On Thu, May 14, 2009 at 04:04:57PM -0700, Eric Buehl wrote:
> > > Hello,
> > >
> > > I submitted a bug a while back describing ffmpeg's failure to account for
> > > varying frame sizes in a single file.
> > > http://roundup.ffmpeg.org/roundup/ffmpeg/issue879  I have confirmed that
> > the
> > > sample referenced works as expected in mplayer so I do not believe it is
> > a
> > > problem with lavc/lavf.
> >
> > >  Attached is a patch that works for frames of
> > > varying height (possible if interlacing options are mis-used) but it does
> > > not account for changes in width.
> >
> > so its incomplete ...
> >
> > [...]
> >
> > >  ffmpeg.c |   20 ++++++++++++++++++++
> > >  1 file changed, 20 insertions(+)
> > > 726f5c891ba925ffb00806f43c935696105872ef
> >  dynamic_frame_height_adjust.patch
> > > Index: ffmpeg.c
> > > ===================================================================
> > > --- ffmpeg.c  (revision 18831)
> > > +++ ffmpeg.c  (working copy)
> > > @@ -923,6 +923,26 @@
> > >      if (ost->video_resample) {
> > >          padding_src = NULL;
> > >          final_picture = &ost->pict_tmp;
> > > +     if(ost->resample_height != ist->st->codec->height)
> >
> > tabs and as this is under if (ost->video_resample)
> > i wonder if it works if thats false to begin with ...
> >
> >
> > > +        {
> >
> > inconsistant { placement
> >
> > [...]
> > --
> > Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> >
> > Frequently ignored awnser#1 FFmpeg bugs should be sent to our bugtracker.
> > User
> > questions about the command line tools should be sent to the ffmpeg-user
> > ML.
> > And questions about how to use libav* should be sent to the libav-user ML.
> >
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> 
> > _______________________________________________
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> > ffmpeg-devel at mplayerhq.hu
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> >
> 
> 
> Here is an updated patch.  I have add a more correct comparison (which
> includes frame top/bottom bands) as well as formatting clean-up.  It also
> checks for changes in width in the same fashion.

i tried it with a 100x100 + 200x200 mpg concatenated, but it did not work
just heavy artifacts

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Democracy is the form of government in which you can choose your dictator
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