They're pretty much interchangable. Video frameworks like gstreamer just give you qtdemux to parse .mov, .mp4, and even .m4a or .m4v (which are just MP4s with d

They're pretty much interchangable. Video frameworks like gstreamer just give you qtdemux to parse .mov, .mp4, and even .m4a or .m4v (which are just MP4s with different file extensions).