That’s why sometimes you come across the error message like 'the movie could not be opened' or 'MP4 file not compatible with QuickTime' when trying to open MP4 files on Mac computer.Īlso, damaged or corrupted MP4 file is another culprit, but it is not the main reason. For instance, the default QuickTime Player plays MP4 videos encoded with MPEG-4 or H.264 video codec and AAC audio codec only. In specific, MP4 is a container format which could include numerous different video audio codecs based on the usage, and also determines how a MP4 player can play a MP4 file on Mac most. So, if your QuickTime Player lacks the right codecs to recognize certain MP4 videos, you should first convert unplayable MP4 videos to Mac-supported codecs or other formats like MOV, or simply switch to a more powerful MP4 player for Mac on the road to smooth MP4 playback. Though MP4 is an Apple standard pushed with QuickTime 6 that by natural is playable on Mac with QuickTime player, QuickTime only plays MP4 files on Mac that have been encoded to meet Joint Video Team (JVT) standards. How to Play MP4 on Mac without QuickTime? If this is a known problem that is going to be fixed eventually, is there something I can do as a substitute (ie a plugin for now)?īecause it seems like the only alternative is to abandon Firefox and start using Chrome, which has no problem with the above-mentioned videos.Free Download for Mac OS X 10.6 or later Table of Contents

Is there a plugin/extension/addon that I need to download to play mp4? Is there something I can tweak or change to make Firefox recognize and play this stuff? Huh? Again, I can download and play it fine. I get the error: No video with supported format and MIME type found. I get the error message: Video can't be played because the file is corrupt. With the huge headline Firefox Now Supports MP4.Ī bit frustrated, because everywhere I look for help on this, I either come across pages saying it should work, Firefox supports mp4 etc, OR forums where it's webmakers asking the question and then the solution is something wrong in their coding - which doesn't help me, the lonely end user. When I search for how to play mp4 in Firefox I end up at this site: Other websites play videos, no problem.īut then I'll go to a website and see a message that the video is either corrupt or is not supported.

Can you play mp4 on mac