This is probably a trivial question, but I want to make sure I’m doing things as intended.
I recorded some game footage with OBS Studio as *.mp4 video, and now I want to add some commentary. Then upload to Youtube.
I’m using Audacity 2.4.2 with Windows 10.
I dragged the *.mp4 video file into Audacity and got the game audio track fine. I added a new audio track in Audacity and recorded my voice in the new track and edited it, so that I’m fine with everything.
Now I want to save my work to the video file.
How do I do this the best way?
Is there a function in Audacity to replace the existing audio track in the video with my mixed audio? Or do I have to export the audio from Audacity and use some other tool to replace the audio track in the video file?
As far as I see it, I should go to File->Export and export my audio to *.m4a (the original audio format within the *.mp4 is aac). Then use a video editor like Avidemux (or just the cli tool ffmpeg) to replace the existing audio track with my newly created track. Is this the correct workflow?