Why do so many people put different file ext. (containers) of video to share online. Is it they stick with one format and go with it or is it different formats are good for different types of video. Cause I've been on the video sharing forums for awhile now and I'm still learning the ropes. And I thing H264x used with mp4 ext. is the best Which brings me to my second question ... encoding video via CRF or Constant Quality looking for some good software that doesn't have to be free it could be something like TMPGEnc or something you pay for. 3rd Question a fast DVD ripper that uses cuda to help speed the process again doesn't have to be free. Lastly encoding with 64 vs 32 and if 64bit is faster please show me some software that encodes at a 64bit rate.