Why is my video-to-audio conversion silent or incomplete?

Play the original video and check that it contains sound and is fully downloaded. Then confirm that the selected trim range includes the intended audio and that the device has enough free storage. Try a short MP3 or M4A export. If it still fails, send support the device, app version, source format and error message so the problem can be reproduced.

Steps to follow

1. Play the original from beginning to end where practical and confirm that its cloud download has finished.
2. Check the selected trim range, available storage and output settings, then try a short portion known to contain sound.
3. Compare the test export with the source and note whether the failure is silence, truncation or an explicit error.

Collect details that help reproduce the issue

Keep the original file unchanged while troubleshooting. If contacting support, include device, app version, video format and the exact message, without sending private media unnecessarily. A small repeatable example helps distinguish an inaccessible source from a conversion or export problem.