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

[Nicolas George]

Jun Li (12019-05-10):
> I think now I understand what you mean"lavfi does not support real
> reconfiguration of the stream properties. "
> Even we have a perfect filter for this case, we still have to dynamic
> turn on/off the filter per frame's metadata.

No, that is not what I meant: there is nothing to turn on or off if the
filters itself examines the frame metadata.

The problem is that if a filter does that, it can switch from outputting
1920×1080 to 1080×1920 when the orientation changes. Most filters and
the framework do not support that.

> Then I just wonder maybe we just need a function to rotate/flip the frame
> data, rather than using filter ? Do you mind sharing some advice ?

That would not change anything, since it was for the wrong problem.

Regards,

-- 
  Nicolas George
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