The easiest way to avoid sync issues is to compress your video following our compression guidelines.
Here are some common causes for loss of audio sync:
- Your source file is out of sync. Resolve any pre-existing sync issues in your editing software, then re-upload to Vimeo.
- There may be slight variation between decoding technologies. Your video may look or sound different across different players and browsers. To minimize effects, make sure your browser and Flash are both up-to-date.
- Your video is encoded with a variable frame rate. Make sure you are using a constant frame rate.
- Your video contains multiple edit list entries. This affects videos edited with QuickTime technology. Use the “Export” feature instead of “Save” or “Save As.”
If you're not quite sure what's causing your sync issue, please contact us so we can investigate further. Be sure to provide a link to the video(s) in question and a description of the places in the video where the loss of sync is especially apparent.