My card is GeForce GTX 1650 Max-Q and it should suppport it. Am I missing something? I thought B-frames should decrease the file size. B-frames are used as confirmed by ffprobe -show_frames output.mp4 | grep "pict_type". I tried adding option to use B-frames: -bf:v 3, but it only increases the encoding time byt about 1.5 seconds, but the file size does not change. I have this command ffmpeg -i input.mp4 -vcodec h264_nvenc -rc vbr_hq -cq 19 -rc-lookahead:v 32 -preset slow -profile:v main -c:a copy output.mp4įor my one-minute test video, it produces a file about 82.5 MB big in about 5 seconds.
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