If you try to open a MP4 video with incompatible codec with QuickTime player, the program will reject it.
Why QuickTime can't play/recognize MP4? That's because QuickTime only plays MP4 files compressed with the codec of MPEG-4 and H.264. If you are a QuickTime user and failed to open MP4 files here, we'll provide you some solutions to get QuickTime open and play MP4 without hassle. 'the movie could not be opened' error would occur.
Although QuickTime natively supports MP4 format, not all MP4 movie files can be played well on QuickTime.
Best Solutions to QuickTime Not Playing MP4 FilesĮven an omnipotent media player will have to be yield to video format incompatibility, and the veteran QuickTime is no exception.
