I shot an interview with my D5200 this week and the test clip was great. I stopped the camera 2 other times over the course of about 20 minutes. At the end of the interview I reviewed some of the video clips, watching the start of 2 after viewing a 1 minute test all the way through, and everything looked good. When I got home I found that both longer clips had the video freeze apx 1 minute in and then the audio and video became unsynced. I've had the camera for almost a year and never had any issue like this. I brought in the video clip from the camera a couple times and also created 3 different Adobe Premiere files to test if it was a download problem or a AP file issue, none of it worked. I had my son bring the video into his computer, same result. I also watched he clip through in the camera and in every case the video will not play through. What's worse is the audio continues but skips, so I don't know if I can salvage any of it. I have never formatted my SD cards. Does this sound like an SD card issue or camera issue?