When I type the following
``` ffmpeg -i input.mov -c:v prores -profile:v 3 -c:a pcm_s16le -bsf:v prores_metadata=bt709 output.mov
I have the following error:
Unknown bitstream filter prores_metadata
However this bitstream filter is documented here: https://ffmpeg.org/ffmpeg-bitstream-filters.html#prores_005fmetadata
ffmpeg version is 4.1 downloaded from Homebrew on macOS 10.13.
Any idea what is going wrong?