Comment fix
AV Foundation video writer: added timeout to add frame for the case in which the writer for some reason does not become available (to avoid app being locked)
Log manager fix (unnecessary warning on mac mentioned log not being initialized when it indeed was)
AVFoundation video writer improvements: now supports different video codec/file types (prores, h.264, etc) and has added security to avoid deadlocks when writer adaptor is not ready for new frames.