This is a sample guest message. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
Aspect ratio just refers to the ratio of the dimensions of the video. If you don't want to distort the video then don't change the aspect ratio. If the video's aspect ratio doesn't match the screen dimensions of your device and you want the video to be full screen then you'll need to adjust the resolution/aspect ratio. There's no universal "best". You need to clearly define what you're looking to achieve.
With any conversion tool it's a matter of balancing compression and quality.