I want to watch Twitch chess and bridge videos, listening to the commentary to improve my skills. However, the broadcasters are often also streaming background music, and when the broadcast is saved as a video, lots of the commentary is muted because the music is copyright. Does Twitch have some means of selectively muting the background music, but not the commentary when the stream is saved as a video?
There's a fairly common method in most streaming software now to split out the audio into different feeds so that the music is streamed but not saved into VODs.
It's something that streamers themselves have to do, and most don't. If the streamer doesn't separate out the audio from their mic vs the background music, then there is nothing that Twitch or anybody else can do. Separating two audio tracks that have been flattened into one (and then compressed to hell) is like trying to unmix paint.
