[FFmpeg-devel] [PATCH 0/2] VDA decoder for ffmpeg

Gwenole Beauchesne gb.devel at gmail.com
Wed Aug 22 00:06:31 CEST 2012


2012/8/21 Xidorn Quan <quanxunzhen at gmail.com>:

> And since VDA can output raw yuy2 pictures,
> there will be no performance loss to use this decoder instead of
> origin H.264 decoder with VDA HWAccel (even faster because there is
> no memory copying inside the decoder.)

Since the HW decoder will hardly emit YUY2, this incurs a format
conversion. YUY2 requires more bits per pixel than NV12, so the
possible gain you suggest may not be one actually.

I think it would be best to opt for the "native" decoder format first.
Does VDA expose that?


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