[FFmpeg-devel] [PATCH]Reset rotation information when using the transpose filter

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Nov 15 11:34:04 CET 2012

Clément Bœsch <ubitux <at> gmail.com> writes:

> On Thu, Nov 15, 2012 at 10:07:14AM +0000, Carl Eugen Hoyos wrote:
> > Clément Bœsch <ubitux <at> gmail.com> writes:
> > 
> > >  - the user has a player honoring correctly the metadata, but he wants to
> > >    rotate the video even more (without even knowing there is already a
> > >    soft rotation done). So he will just add naively a vf transpose: this
> > >    will still work for him, except if you decided to drop the rotate
> > >    metadata from the filter: the transmux/transcode needs to keep a
> > >    maximum of information from the input.
> > 
> > I don't think this is the use-case we should care about.
> > (It sounds like "undefined behaviour" to me.)
> I don't know, I think it's better to make a clear distinction between soft
> and hard rotation. One does not imply the other, they are independent.

I would have expected that if ticket #515 gets fixed / implemented, 
ffmpeg would only insert a transpose filter if the user did not 
already specify one on the command line.

Carl Eugen

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