Re: [FFmpeg-devel] [PATCH] Added the possibility to pass an externally created CUDA context to libavutil/hwcontext.c/av_hwdevice_ctx_create() for decoding with NVDEC

[Timo Rothenpieler]

Am 07.05.2018 um 19:37 schrieb Oscar Amoros Huguet:

I was looking at the NVIDIA Video codec sdk samples 
(https://developer.nvidia.com/nvidia-video-codec-sdk#Download), where you can 
find the header NvDecoder.h next to cuviddec.h where CUVIDPROCPARAMS is defined.

Anyway, I should have looked at ffmpeg code directly, to see what’s being used, 
sorry for that.

Great then! Having the same cuda stream (either default or custom) for 
everything is the safest and most efficient way to go (in this case).

Thanks, and let me know if I can help with anything.

You can find the mentioned changes on my personal github:
https://github.com/BtbN/FFmpeg

The cuMemcpy is entirely gone, not just Async. And the CUstream can be set and will be passed on to cuvid/nvdec.

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