Getting metadata from video stream

[Mohammed Sameer]

On Tue, Oct 29, 2013 at 08:41:05AM +0000, Sebastian Dröge wrote:
> On Mo, 2013-10-28 at 03:51 -0700, Blazej wrote:
> > Hello,
> > 
> > Thanks for suggestion!:) I cannot see this parameter in the output of
> > gst-discoverer, but maybe it's because I am limited to 0.10 version of
> > gstreamer. 
> > 
> > Also, I did some research and found out that this kind of information is
> > stored in 'Atoms', which are part of MPEG-4 standard. In such case maybe it
> > is not supposed to be displayed by gst-discoverer, since it seems to display
> > only the generic information about a file. But on the other hand, if ffprobe
> > can detect this...
> > Maybe these parameters should be accesible via qtdemux somehow?
> 
> I think extracting that information is currently not supported and
> support for that has to be added to qtdemux. It should use the
> image-orientation tag probably.

I think this is the rotation extracted from tkhd Atom transformation matrix.

There is a bug https://bugzilla.gnome.org/show_bug.cgi?id=679522 about that
with a patch that extracts the info but it doesn't yet export it.

I'm personally interested in that issue but I'm not sure how should the data
be exported.

Cheers,

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