Audio isn't being added to output mp4

[DonaverBoxwood]

Describe the bug
Saved mp4 files do not contain audio.

To Reproduce
Steps to reproduce the behavior:

1. Go to any site that the sniffer detects
2. Download the stream
3. Open in any video player and note the lack of audio

Expected behavior
Videos contain audio

Desktop (please complete the following information):

• OS: LMDE Linux
• Browser: Zen Browser
• Version: 5.2.0

[Queen-Rora]

Hi, Try this new version.
#509 (comment)