Hi, I'm currently working on an editing project for a YouTube video. On one of the files I'm using, WMM is stripping the audio from a .mp4 fie. I know the audio is there because when I open it in another program for playback, it works fine. I also know that it's stripping the audio from this particular video, because there's another video in the project that still has its audio.

The video getting stripped is about 17 minutes long

Please help.