To: arn1es
Dear Jason,
To get the created video of best quality please try to select the input file parameters like video bitrate, frame rate and frae size to be the same for the output, to do it press the Advanced button after selecting the format. To check the input file parameter right click on the file while in AVS Video Editor - choose Properties.
If you increase the bitrate, the video size will be increaed also.
Please let me know if I can be of any further assistance to you.
Kind regards