[FFmpeg-devel] [PATCH]Reset rotation information when using the transpose filter
Carl Eugen Hoyos
cehoyos at ag.or.at
Thu Nov 15 11:05:04 CET 2012
Clément Bœsch <ubitux <at> gmail.com> writes:
> > > - transpose is a filter to physically change the
> > > video: the correct way is likely to kept the
> > > metadata after the transcode (isn't it the case?)
> > I believe that this is the bug:
> > The metadata should not be kept if the transcode
> > filter is used (it should be reset).
Sample from ticket #505:
$ ffmpeg -i sample-in-issue-505.mov out.mov
Plays correctly with QuickTime, this was implemented
by Stefan Gehrer.
Cannot play correctly with other software that does not
implement mov rotation (MPlayer).
$ ffmpeg -i sample-in-issue-505.mov -vf transpose=1 out.mov
Plays fine with every player except those that implement
mov rotation (QuickTime).
The bug is that the transpose filter does not reset
I do not understand why the "rotate" metadata cannot be
overwritten from the command line...
And if a player correctly implements mov rotation by
reading FFmpeg's "rotate" metadata and inserting the
transpose filter, I don't see any problem if the filter
resets "rotate": It simply makes no difference in that
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