Well, I have downloaded the trial version of AVS Video Converter 8.1 and I tried to convert a VRO file to AVI (h.264 codec, YouTube HD profile) to upload it to YouTube. When I play the video to prove it, I notice that there are dropping frames in slow scenes, and in fast-moving scenes the frames are like the original file. It seems like the codec uses a kind of variable frame rate to make the file size smaller. I want to keep all the original frames, how can I do that? It's so anoying... Thanks.