[FFmpeg-devel] [PATCH 2/2] avcodec/videotoolbox: fix decoding of some h264 bitstreams

wm4 nfxjfg at googlemail.com
Mon Sep 25 13:06:39 EEST 2017

On Mon, 25 Sep 2017 09:02:36 +0200
Hendrik Leppkes <h.leppkes at gmail.com> wrote:

> On Mon, Sep 25, 2017 at 3:31 AM, Aman Gupta <ffmpeg at tmm1.net> wrote:
> >
> > How do the other hwaccels handle mid-stream SPS changes?
> >  
> Real HWAccels (ie. VAAPI, VDPAU or DXVA) communicate the SPS/PPS
> content for every frame, they don't keep a persistent state internally
> - that way the only "state" is the frame size and pixel format, and
> when those change get_format is called and the hwaccel re-initialized.

Maybe it would be better if VT detected SPS/PPS changes itself, and
reinitialized the VT session on demand when feeding slices. This way we
wouldn't have to mess with the normal h264 software decoder reinit

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