Supported File Formats for Upload in Knowmia

Supported Formats

The Knowmia (formerly TechSmith Relay) Classic Recorder and Knowmia Web Upload option will upload:

For video files:

File formats (file extension) Supported Video Codecs Supported Audio Codecs
MP4 (.mp4) AVC (H.264) AAC (AAC-LC, HE-AAC)
Windows Media Video (.wmv) WMV3 WMA3
QuickTime (.mov) AVC (H.264) AAC (AAC-LC, HE-AAC)



  • Knowmia can no longer process QuickTime (.mov) files that contain video encoded with the TSC2 codec. These types of files were created by the Knowmia Mac Classic Recorder prior to version 5.1.2 (January 2017).
  • The Web Upload option has an individual file size limit of 1.5GB. Please use the Knowmia Classic Recorder to upload files larger than 1.5GB.

For image files:

  • Please upload PNG, JPG, or GIF files only, with a minimum height and width of 200 pixels.

For audio description tracks:

Workaround for Uploading Unsupported Video File Formats

If you have media that does not meet the requirements specified above or that is experiencing issues uploading, please try re-encoding the media using the steps in the following article here .