TIP: Use MKV2M4V to convert the MP4 file with Audio Error

Occasionally, the audio track of the mp4 file is not played on the OS's default media feature.

In this case, it can use MKV2M4V to convert the audio track of these mp4 files with audio error.

1. Open this mp4 file.

(1.3.1 or later)
First, set the format filter to ‘ALL’ and then open (or add, drag) it.

(1.3.0 or earlier)
Drag it into the main window. (red box in the below image)

2. Choose 'Custom' mode.

3. Choose 'ALAC' or 'AAC' audio codec.

4. Click start button.