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It is well know that MP4 is a multimedia container file format that can store data that are encoded with various different video and audio codec as below: Why MP4 files fail to play on QuickTime player?
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An invalid sample description was found in the movie. Any help on the reasons why Quicktime won't play the MP4 movies would be greatly appreciated." When I try and play the movies using Quicktime I get the following error message: The movie could not be opened. mp4 format that for some reason Quicktime player doesn't seem to like. What am I doing wrong? Where should I open the video to play it? itunes or imovie?" When I open quicktime, open file, mp4, there is a picture of the video with no sound and its not playing. I downloaded some mp4 videos and quicktime but cannot get them to play.
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For Mac users, when you are trying to play some MP4 video with QuickTime player, you will encounter the following problem:
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