I am not sure if this is possible. If not, then I would like to request it as a possible feature.
My use case is to sync two Twitch streams that I have downloaded. In my example, the one stream starts around 31min20s into the other. I have picked a point in the two videos around which I would like to align (e.g., 23m25s and 54m45s).
Is this currently possible with syncstart?