Why the output videos play fast on Mac?

If all output video and audio files play fast, do this to fix it: go to Apple icon on the top-left corner and choose System Preferences,  choose Sound and choose Internal Speakers in Output. Then convert files to try again

If the method doesn't work, contact us for help. Please attach the information below to help us perform troubleshooting:

1. If it's a video file and the size is less than 2GB, upload your original video file to wetransfer ( https://wetransfer.com) and share the link with us for testing purpose. Also, the output settings is helpful for us to find out what's the reason. 

2. If it's a DVD, contact us with the DVD details like full name, region code, purchasing link from Amazon, and so on.