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Edit lists is a feature, that allows you to edit videos without re-encoding. For example, you want to remove a scene, make your edit points which are written into the container file. A video player reads those instructions and just such parts of the video. However, not many players seem to support that feature, nor does Instagram, so simply don't use it. I ...


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The mdat box in a MP4 contains the media payload but it is freeform. It is as good as gibberish on its own. The moov box identifies how many tracks there are, which codecs and their parameters those tracks contain, which portions of the data in the mdat correspond to which tracks, what their timestamps are..etc. What MP4 repair utilities do, is use the track ...


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