[FFmpeg-devel] [PATCH v2 2/2] fftools/ffmpeg: Add stream metadata from first frame's metadata

[Jun Li]

On Mon, May 6, 2019 at 1:52 AM Nicolas George <george at nsup.org> wrote:

> Jun Li (12019-05-05):
> > Fix #6945
> > Exif extension has 'Orientaion' field for image flip and rotation.
> > This change is to add the first frame's exif into stream so that
> > autorotation would use the info to adjust the frames.
>
> What happens if not all frames have the same orientation?


Thanks Nicolas for review !
I agree with it that the patch can't solve the case that "not all frames
have the same orientation".
The only way I can think of (correct me if I am wrong) is a filter that
dynamic do tranformation per frame.

>From a technical perspective, this kind of media is absolutely possible.
For example motion jpeg consists of jpg with different orientations.
But I assume it is rare with my limited knowledge. What do you think?

Best Regards,
Jun




Regards,
>
> --
>   Nicolas George
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