Since*
6.1
This is the CUDA variant of the libvmaf filter. It only accepts CUDA frames.
It requires Netflix’s vmaf library (libvmaf) as a pre-requisite.
After installing the library it can be enabled using:
./configure --enable-nonfree --enable-ffnvcodec --enable-libvmaf.
Examples
-
Basic usage showing CUVID hardware decoding and CUDA scaling with scale_cuda:
ffmpeg \ -hwaccel cuda -hwaccel_output_format cuda -codec:v av1_cuvid -i dis.obu \ -hwaccel cuda -hwaccel_output_format cuda -codec:v av1_cuvid -i ref.obu \ -filter_complex " [0:v]scale_cuda=format=yuv420p[ref]; \ [1:v]scale_cuda=format=yuv420p[dis]; \ [dis][ref]libvmaf_cuda=log_fmt=json:log_path=output.json " \ -f null -