Hey all, my apologies if this has been asked and answered already, but I did search and can’t find anything that solves my problem. I have ripped some copies of my DVD collection so that I could play them on my razor cell phone. They were saved .m4v but I changed the file extension to .mp4 because the razor cell phone won’t play .m4v. I used usb to transfer the movies to my phone and they are showing up on the phone but I’m having issues with the play back. It will play choppily about 4 seconds then freeze. When I close the video player I still hear audio playing but no video. It’s very strange. Is it because I changed the file extension? Has anyone else been having problems like this?