I want to be able to record my voice from a microphone while watching a video, and to have the recorded sound be in sync with the video. My requirements are,
- Compatiable with Linux
- Open source
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it is very easy to use and the default settings should be fine in most cases. just add the desired inputs and you are good to go. Take a look at their website.
you would have to record your voice seperately and then combine with one of the commands described in this superuser post. Simplest would be
ffmpeg -i video.mp4 -i audio.wav output.mp4
But that might not work best or be good in any way so evaluate the descibed options yourself.