Default Microphone input device

[lowbit]

Add abillity for app to record video with sound including microphone input device which the app itself will recognize and add needed params (instead of current method where we have to add command arguments, and in case micophone changes, it will not record due to error). Example: -f dshow -i audio="Remote Audio" -filter_complex amix=inputs=2:duration=longest

In case "Remote Audio" changes, it will give error when trying to record.