looking for somebody able to fix mp4 and mov files

[octopus]

After a crash of my camera I succeeded to get back my files but files MP4 were transformed in :
Movie1.MP4 (2Go) => Fil1.MOV (2Go) + Fil1.MP4 (256ko)
Movie2.MP4 (1Go) => Fil2.MOV (1Go) + Fil2.MP4 (256ko)

MP4 files are ok but very short (3s) and black.
MOV are corrupted. I think I need to correct binary code.
I don't understand why crash can generate MOV files from MP4 files.

Do you know somebody able to fix that? ($$)

Thanks
Rémi

[Ai Haibara]

You should probably continue this topic in your original post - crossposting is frowned upon, here.

Run the videos through a utility like MediaInfo, to see what it says about them. You might be able to simply rename the extensions.

However, I doubt it'd be possible (or easy) to hex/binary-edit the files back to what they were - do you know exactly what bits were originally in all those locations?

[octopus]

I thought post in Newbie wasn't the good place sorry.
Media Info said nothing special, .MOV extension and size.
I can't understand how MP4 camera can generate .MOV.

That's why I think crash just cutted header and generated a 256ko MP4 file with only header / launch session (3second black video). Big file .MOV is just moov atoms parts without header. Could be ?