I have 192 video files to combine about 1H of video. All files are HDV MP4(AVC) format 1920x1080. Camera is not mine and I dont know which brand. Can check if needed. When running the combine tool I get a message that not all videos can be combined. at the end I get 10min of video. so I made a test, randomly I selected 2 videos and run the tool again. One video was rejected. I selected again the rejected video and a new video file. This time the rejected video pass and the new video was rejected. Selecting all the three video files, the first video pass again and the other two were rejected. The combine tool seems to be unstable. I have win10 in my computer.