You can control the speed of forwards playback and. Speed Control,Scale,Seek Time,Frame-by-frame playback etc.) If you expect that you can play a file that can not be played on QuicktimePlayer, you might be disappointed. The purpose of this app is to provide features not to QuicktimePlayer. I've found the easiest option is to convert them using Quicktime Pro. Movie player which can play MPEG4,MOV,m4v format. IMovie is a bit of a pain with regards to codecs. All Apple have done is just heavily backed these new standards in audio and video (which makes sense, they are the best around). MPEG-4 is a pretty wide-ranging set of standards created and utilised by many companies. mp4 file, if iTunes or Quicktime doesn't support the codec (in the OP's case it sounds like Quicktime supports the audio codec but not video) it won't play it.Īpple didn't invent MPEG-4.

What this means is that even though you have a.

You see, the containers above can contain different codecs, such as: The codecs are the important bit (and what some people confuse with the file itself). It's a bit confusing to get your head around but it basically contains the audio and video which use specific codecs. mov etc.) is what is known in the video world as a container.

Apps to play mp4 on mac