[FFmpeg-devel] [PATCH V5 1/2] avutil: add ROI (Region Of Interest) data struct and bump version

Nicolas George george at nsup.org
Fri Jan 4 13:22:12 EET 2019

Rostislav Pehlivanov (12019-01-04):
> > +typedef struct AVRegionOfInterest {
> > +    size_t self_size;
> > +    size_t top;
> > +    size_t bottom;
> > +    size_t left;
> > +    size_t right;
> I'd still much rather have uints with fixed sizes than these platform
> dependent types.

Guo, Yejun said:

>> I usually choose 'size_t' for the meanings with length/size.

But that is a mistake. size_t is for length/size of objects in memory,
not any length/size.

These numbers, unless I am mistaken, are coordinates within an AVFrame.
In that case, the only correct type is the same as AVFrame.width and

> Use an AVRational with a denum set to the max quantizer

Can you explain "set to the max quantizer"? For decoders it makes sense,
but what should the encoders do? Return EINVAL? Scale?


  Nicolas George
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