[FFmpeg-devel] [PATCH] mov: Evaluate the movie display matrix

Michael Niedermayer michael at niedermayer.cc
Thu Oct 6 23:07:32 EEST 2016


On Thu, Oct 06, 2016 at 12:12:07AM -0400, Vittorio Giovara wrote:
> On Wed, Oct 5, 2016 at 10:07 PM, Michael Niedermayer
> <michael at niedermayer.cc> wrote:
> > On Wed, Oct 05, 2016 at 05:25:33PM -0400, Vittorio Giovara wrote:
> >> This matrix needs to be applied after all others have (currently only
> >> display matrix from trak), but cannot be handled in movie box, since
> >> streams are not allocated yet.
> >>
> >> So store it in main context and if not identity, apply it when appropriate,
> >> handling the case when trak display matrix is identity and when it is not.
> >
> > do you have a testcase for this which you can share ?
> >
> > thx
> >
> > [...]
> > --
> 
> I created one for the occasion
> https://www.dropbox.com/s/w2uu37o11rvoz1q/moviedispmat.mp4?dl=1

with ffplay before the patch the image looks round, after the patch
it looks quite squished, is that intended ?
what is the intended / correct SAR / DAR for this sample ?

thx

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

Breaking DRM is a little like attempting to break through a door even
though the window is wide open and the only thing in the house is a bunch
of things you dont want and which you would get tomorrow for free anyway
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