[Libav-user] Initializing HWAccel decoder, how do I set dec_ctx width and height before opening codec?

[Sergio Basurco]

What I did was setting aVCodecContext->width and height to something > 
0. (200x200).

The decoder resets these with the correct values while decoding.

Saludos / Best regards,

*Sergio Basurco*
Coherent Synchro

On 04/06/2018 10:03, Sergio Basurco wrote:
>
> Hi,
>
> I'm setting up my program to use the h264_cuvid decoder. I'm using 
> ffmpeg_opt.c, ffmpeg_cuvid  and ffmpeg_hw.c as a reference. When 
> initializing the codec must have set the CodecContext width and 
> height. Apparently this information should be available in the SPS/PPS.
>
> From other ffmpeg posts, seems I will have to decode a frame in order 
> to get width and height... but I can't since I cannot open the codec, 
> due to missing width and height. I'm quite stuck on this.
>
> I cannot see how ffmpeg parses width and height and feeds it into the 
> AVCodecContext.
>
> -- 
>
> Saludos / Best regards,
>
> *Sergio Basurco*
> Coherent Synchro
>
>
>
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