After effects Error Filename.mp4 unsupported format 86::1

[benniebwoie]

Hi ,
Please help me.I am using Ae 2015...It's been working so smoothly...but I opened some of my Ae project files.This error started showing up..I am in middle of editing of a short film I need an urgent help..I downloaded the Quicktime.But it doesn't work.I simplified the source destination it also didn't work.But there was no problem until yesterday when I opened its shows error..I am working on both Ae and Pr ...I have been using many dynamic links too..I tried replacing file...Dependencies ..Still stuck...help me!!!

[Mylenium]

Without knowing anything about your source files nobody can tell you much. Start by flushing the AE caches.

Mylenium

[benniebwoie]

It's an .mp4 filetype.I have been working with this file for almost 3 months.There wasn't any problem.But within a week its starting showing unsupported format.I can't even replace the file.But no problem on importing .mov files.
Thank you for your reply..

[Roei Tzoref]

Did ypu try Mylenium's suggestion? Under preferences-> media & disk cache you should clean both options and see. if that does not work try reinstalling Quicktime

[Kevin-Monahan]

Hi benniebwoie,

Did either of our experts' suggestions work for you? If so, please mark that answer as the correct one.

Thanks!
Kevin