[FFmpeg-devel] [PATCH] avfilter: add scale2ref_npp video filter

[Roman Arzumanyan]

This patch adds scale2ref_npp video filter which is similar to scale2ref, but accelerated by NPP. CLI sample:


./ffmpeg \

  -hwaccel cuda -hwaccel_output_format cuda \

  -i ./bbb_sunflower_1080p_30fps_normal.mp4 \

  -i ./920px-Wilber-huge-alpha.png \

  -filter_complex "[0:v]scale_npp=format=yuv420p[v0];[1:v]hwupload_cuda[v1];[v1][v0]scale2ref_npp=w=oh*mdar:h=ih/4[foreg][backg];[backg][foreg]overlay_cuda=x=(main_w-overlay_w),scale_npp=w=1280:720[out]" \

  -map "[out]" -c:v h264_nvenc -y ./output_overlay.mp4

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