Video File Repair Guides
Every guide here covers what actually causes the problem, which free fixes are worth your time, and where the limits are. If a file genuinely cannot be recovered we say so — knowing that early is worth more than a paid attempt that was never going to work.
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Why your MP4 file won't open — and how to actually recover it
Four different problems all look the same from outside. Work out which one you have before you try anything, then follow the free fixes in the right order.
MP4 · moov atom · 0 KB files -
MOV file won't open? Broken file, or just the wrong player
MOV files often play fine on one device and not another. Usually that is a codec problem, not damage. Here is how to tell the difference in five minutes.
MOV · iPhone HEVC · editing software -
Your memory card says "format disk" — do this first
Do not click format. Your files are almost certainly still there. The three things people do in the next ten minutes are what actually loses the footage.
SD card · format prompt · card error -
Video plays audio but no video? Here's how to tell why
Sound is perfect, the screen is black or green. Nine times out of ten that is a codec problem, not damage — and there is a two-minute test that proves which one you have.
black screen · green screen · missing codec -
How to recover video from a corrupted SD card
The full process, including the imaging step most guides skip — and what to do when the recovered files come back the right size but will not play.
SD recovery · PhotoRec · unplayable files
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