I have a strange problem.Some of my avi file recordings on sd card wont play . Ive tried numerous sd cards over time and various players ,WMP, VLC, Wondershare -all play some and not all.All sd cards give general damged /codec messages and i have formatted them and still same probs. I even tried uploading to Youtube and they failed to process. I would say 60% don't play.This is odd given they are all recorded on 1 dashcam and all are same file types. There is probably a batch of no more than 5 sequence that play (ie 101 to 105).Never had a run of 6 playing in sequence.