Hi, I’m recording from OBS with source recorder to get a Charchter sprite to light up. But it does not encode transparency into the file, and instead fills it with a solid black color. Thus I need to accurately remove this black color from my image, but when the image is dim some parts are very close to black, and even setting the chroma key advanced mode to match pitch black, and all the deltas to 0 it still picks up valid parts of the image that shouldn’t be masked. After much searching and fiddling about, I discovered I could run the file through ffmpeg in a preprocessing step before importing the file as follows to remove the transparency:
ffmpeg -hwaccel cuda -c:v av1_cuvid -i “input.mkv” -vf “lumakey=0.05:0.02:0,format=yuva420p” -c:v libvpx-vp9 -pix_fmt yuva420p -lossless 1 -auto-alt-ref 0 -c:a libopus -b:a 128k “output.webm”
Is there a way to do the same thing in shotcut without invoking another tool? Otherwise I do have a .bat script I wrote to automate this but I’d still rather just do it all through the shotcut interface.