Unreadable MP4 file Solved

Question

Hello,

I have a series of 10 video recordings from Live Meeting in MP4 format.
Out of these 10 files recorded under the same conditions, 2 are unreadable!
I tried VLC, Windows Media, QuickTime... same result.
The format is not recognized, playback doesn't even start!

As I am completely clueless about video file formats, what information can I provide you to help me resolve this issue?

Thank you in advance,
Pascale

pascale6200 · Accepted Answer

... I must add that I tried several things that all failed:  conversions to AVI or MOV format  attempts to repair the files with YODOT...

glandu · Answer

Hello VLc reads a large majority of files, you can identify your files with "media info" so if all your files have the same characteristics, you should conclude that your 2 files are corrupted for some reason X

--
"Donkeys change their minds, not idiots"
remember to mark your message as "resolved" if that is the case.

Pascale6200 · Answer

Thank you Glandu.  Indeed, these files are corrupted. What I'm interested in is being able to restore them... Do you know any video file repair tools? Thank you, Pascale

ziggourat · Answer

Hello,

To repair corrupted (incorrect) files, there are at least two ways to do it:
1) Use software such as: File Repair, Video Repair Software (the free version apparently only repairs half of the file) or something else.
I've never used them so I don't know how well they work, but it's worth a try ;)
2) Use a conversion software as long as it accepts to recognize the file, which is not guaranteed at all. I would suggest trying first with MediaCoder, but another one might also work.
3) Use software to rewrite the header with a hex editor like Hex Editor Neo to name just one, but that exceeds my skills and knowledge. I believe some online sites do it, but that's to be checked...

Generally, this kind of issue happens when the index has been poorly written, but sometimes VLC is still able to read the file. It's a shame that's not the case here :(

Good luck,
Best regards
--
Long live Bobo! ~ Little fish will grow big ~

Unreadable MP4 file

4 answers

At least make a copy of the file to be processed before any manipulation, as a precaution.

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