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

[Peter Gade]

hello gúy
i need code change frequency audio. (my imput is imput.mp4). I want to
change up to 98kHz. Thanks

2016-12-15 10:10 GMT+07:00 Victor dMdB <ffmpeg at eml.cc>:

> 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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