I have a 320mb mp4 file recorded on my Android .It has never played.The thumbnail is greyed out.When i was recording i got message that my storage was full-although when i checked later it still had 33omb storage on my phone.I assume the corruption has something to do with this.All my other MP4s play fine. I uploaded to my desktop but vlc wont play it or even convert it.( oddly it is showing only 188kb when i uploaded it to pc) On YouCut app i get "info code 4106" Wondershare , however just shows lots of pixels. I ve tried a few 3rd party file repairers and all have been unable to repair file.Any recommendations of free ones or perhaps android specific ones would be welcome Im running out of ideas , i can't believe a file can be this badly corrupted.
Do you have the means to upload it and provide link for download to it so that I can have a look at it? It sounds like you have an incomplete and or corrupted Mp4.
I came across this having a similar problem with a junky boblov body worn camera sd card.. and it worked a treat... Which I must say was a surprise https://github.com/bookkojot/mp4fixer
I agree with Sophocles. Please post your file at dropbox, mega, etc. and share it with everyone. Then get a link and post it here. We would be glad to work with it to help you.