I recently used this amazing little utility: http://slydiman.me/eng/mmedia/recover_mp4.htm http://slydiman.me/eng/mmedia/recover_mp4.htm It helped me recover s

I recently used this amazing little utility: http://slydiman.me/eng/mmedia/recover_mp4.htm http://slydiman.me/eng/mmedia/recover_mp4.htm It helped me recover some GoPro footage that went corrupt. You feed it a known good video from the same camera/same settings and then it basically uses the structure of the good footage to rebuild the bad footage. It worked a treat after I found a good file for it. Have a look at it, you may find it helps you out.