[FFmpeg-user] Rotating output in transcode pipeline with C

[Victor dMdB]

Sorry, my question wasnt clear enough! 

It is referring to the ffmpeg C lib, not the cli!

As in how does one implement the rotation with
avformatcontext/avcodeccontext/avstream/avpacket/avframe (I'm not sure
which one to use in this case).
Show quoted text


On Thu, 15 Dec 2016, at 07:05 AM, Jim Worrall wrote:
> I don't fully understand your question, but you can rotate video
> clockwise
> 90* as you input it by adding -vf "transpose=1" before -i
> 
> -vf transpose=2 should rotate it counter-clockwise.
> 
> On Tue, Dec 13, 2016 at 8:28 AM, Victor dMdB <ffmpeg at eml.cc> wrote:
> 
> > Hi!
> >
> > I have an input stream which comes from a mobile device, and therefore
> > has rotation metadata and side_data display matrix.
> >
> > I would like to transcode this, then output a stream, physically rotated
> > without metadata.
> >
> > Do I have to use avfilter? Or can I set a parameter in avformatcontext
> > to transpose it?
> >
> > I've tried setting the output side_data, but would prefer directly
> > output the rotated frames.
> >
> > Thanks in advance for the help!
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