Step 1: Add the video that you want to adjust to the EDIT tab
To add the downloaded video to Edit from the “Completed” tab under the Download tab, right-click the corresponding video in the list and select “Add / Convert” from the displayed menu.
For recorded files, perform the same operation on the Record tab. You can also add a file by opening the Edit tab and clicking the Add button.
Step 2: Open the edit screen
Under the “Edit” tab, click the “Edit” button of the video to open the edit screen.
Step 3: Adjust the volume
Click to open the “Effect” tab on the edit screen. Use “Volume” in the Adjustment tab to make the volume louder or quieter.
The normal volume is set as 100. The higher the number, the louder the volume. If you reduce the value, the volume will decrease 2 times. When the volume adjustment is completed, click the “OK” button at the bottom right to close the edit screen.
Step 4: Save the video
When you return to the main screen, click “Convert” at the bottom right of the screen to save the video.
The video will be saved as new. All changes applied will not be saved to the original file.
That’s all on how to adjust volume of MP4 video files.