Camtasia Studio not recognizing dual track audio in mp4 files

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I have a mp4 file recorded using Nvidia Shadowplay, with the option to record mic audio and desktop audio to different tracks. When viewing the mp4 through the default video player in Windows 10 or VLC media player, I can easily switch between and hear both tracks. When I import the file into Camtasia however, when splitting audio, the only audio I get is from the mic, which is not the track I want. Is there a way to view both tracks without just screen recording the video while it's playing audio from the correct track? Thanks in advance
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thedominator893

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Posted 7 months ago

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Ed Covney

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When Camtasia records the two audio sources (mic & system) and renders an MP4, it "mixes" the two audio tracks into one MP4 file. Once there, audio is no longer separable back to sources. I can only assume Shadowplay works about the same way? So, can you save an MP4 with one audio track in SP, and the second audio track separately? Then import both media files to Camtasia?
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Joe Morgan

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So,

when you set Shadowplay to save audio “To separate tracks “.

4 audio tracks are created because GeForce experience/Shadowplay records system audio “Plus” microphone audio to stereo equaling 4 tracks.

Plus, let me start by saying” I’m no audiophile”so my wording on this topic may be clumsy or off target.

My “Mono microphone” is recorded to two tracks. I don’t know if Shadowplay has done this by default? I suspect that’s the case. Even if Shadowplay were to record to mono. Resulting in only three audio tracks.

The overall situation and resolution should still be the same.

Camtasia supports 2 audio tracks which combined equals stereo. So there’s no way to get to all 4 audio tracks contained within the Shadowplay MP4’s.

In the image below you will see a desktop recording that I made this morning. I recorded myself speaking through my microphone and playing some music through a media player.


I opened that file in Adobe Audition. As you can see there are 4 audio tracks. I could export the top two tracks separately to create a system audio track/file. Then do the same for the lower audio tracks/ microphone and import them into Camtasia separately.

I would think you would have no problem doing the same thing in the free program Audacity. I don't use the program myself so I can’t tell you with certainty. https://www.audacityteam.org/

It's not possible to save audio separately from a Shadowplay video recording. There is no such option. 

 Regards, Joe

(Edited)
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thedominator893

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Alright I'll check out Audacity, thanks for your help