I have a video from a Sony HDR-CX190 that shows as 3:19:04 in kdenlive. The file from the Sony is in .mts format. I choose Raw DV, DV NTSC 4:3 for rendering. The rendered video looks great, but stops at 2:46:00, which is short, missing the last 33 seconds of the recording. Being new to kdenlive, my first question is, why?