[Feature Request] lossless audio in advanced output mode

[RaceDriverMIKU]

First, I rarely stream with OBS,just record for game footage with audio multi-tracks.
Also, I searched forum,but could not found about lossless audio tracks in advanced mode.
So I found that Youtube only convert as opus with vp9 when audio source is lossless, and personally I want to record my audio tracks as lossless.
But, some of containers can be used only aac and alac (mp4), So my idea is

-Track 1-
[AAC Bitrate:320] [Codec:pcm;flac;alac;mp3;opus;etc...] [Codec Setting:compression level or bitrate]
Name:

 

[DeMoN]

pcm would also reduce cpu usage by audio coding too.

The source audio codec shouldnt be relevant to get opus on youtube though. Opus is played at the VP9 Videos and AAC at the H.264 Videos of youtube.

OBS' ffmpeg output would allow other audiocodecs, but there multitrack audio doesnt work :(