this is a cli output module, don't use it in the gui! the gui may perform
frame drops, especially when the outputs need to be written out and are encoded
as we go.
an example command line would be
vkdt-cli -g /path/to/mlv-sidecar.cfg --format o-ffmpeg --audio audio.raw
note that the sidecar here can be the one you've been using in the gui,
i.e. the autogenerated one if you point vkdt to the folder or file
will work. the cli will append the necessary processing chain to the graph.
we use plain popen() style communication with the ffmpeg binary (you'll need
to have it installed in your PATH for this to work).
this module only writes a .mov stream, the audio channels will need to be
combined manually, maybe like
ffmpeg -i output.mov -f s16le -sample_rate 48000 -channels 2 -i audio.raw -c:v copy combined.mp4
one of the few ways of replaying a video with perceptual quantiser or hybrid log-gamma curves seems to be something like
ffplay test_0000.mov -vf zscale=transferin=arib-std-b67:transfer=bt709:rangein=tv:range=pc:primariesin=2020:primaries=709
input the sink to read the raw pixel datafilename the output filename to write the stream toprofile the encoding quality presetquality affects the bitratecolour chroma subsampling: 422 or 4444, both 10 bits