The output video quality depends on many factors, such as source file, computer configuration, and the output parameters you choose. For a better output quality, it is advisable to close other unnecessary programs to make sure the computer is not over task first. For more suggestion, you can follow the steps below:
1. Be sure that the video plays well on the computer and it is not damaged.
2. Click the Settings button to select High Quality and keep the default parameter.
3. If the source file and the output format you choose are supported for High Speed Conversion, you can click Menu>Preferences>Convert to enable High Speed Conversion.
If it doesn't work, click this link http://dropcanvas.com/ to upload the video, then contact us the share link when you finish.