Problem
After importing an AVI file, the file cannot be added to the timeline and no other files are able to be imported.
Solution
This occurs when importing an AVI file that is not encoded in TSC2 or TSCC codecs. The best workaround is to convert the AVI to MP4 using Handbrake.
Download Handbrake and watch the tutorial below to learn how to convert the file to MP4 using Handbrake.