If the header is completely missing, software needs a "map" to understand how to read the raw data. This requires a —a healthy video recorded with the same camera and settings as the broken one. Best Ways to Repair Corrupted MP4 Video File. : r/software
: You can try fixing minor corruption by using VLC's built-in repair features or by re-encoding the file into a new format. nippy user since 2015 mp4 fix
If you have an actual “nippy user since 2015” MP4, run: If the header is completely missing, software needs