Awesome. I will try that. Thank you for the help.
AVIDemux is a pretty straightforward app. but there is still a little bit of a learning curve
since I suggested it, I'll point out the steps:
* when you open it the first time you'll get a screen that is set to copy both video and audio. I'd suggest you get in the habit of setting the output format from MKV Muxer to MP4 Muxer (
although that isn't necessary for stripping audio but since drone footage is mostly MP4...)
* next, open your XRecorder video. On top menu, go to audio, click and simply save audio. On my machine it saves as an .aac audio file
* now, open your flight video from your video card (
or wherever you transferred it to). Make sure you're still on '
copy' for both the video and audio and using the MP4 muxer. Go back to the audio, click it again and this time, go to 'select track'. If it opens and says there's a track one, with a check mark, you can uncheck that track, select track 2, check it, and then you can slide over and add your XRecorder audio file. Then save. Saving only takes a few seconds. Easy Peasy
* you might have a differential in time between the Flight video and the XRecorder video, so if you require perfect sync between audio and video you'll need to chop a few seconds off of whichever recording you started first on your flight. Usually when I record both there is only a 3 or 4 second difference, at most, in start time and end time
* this is also an easy way to add a music track to your video's