[Libav-user] how to convert NV21 to YUV420P with swscale

[Carl Eugen Hoyos]

Peter Pan <hawkwithwind at ...> writes:

> > Doesn't this simply indicate that what the camera
> > calls "NV21" is not "AV_PIX_FMT_NV21"?
> 
> Maybe you are right, can you help me with this?
> How can I find out what the format exactly is?

If there is no documentation, you could look at 
the data and try to understand its structure.

Carl Eugen