[Request] Support for opt-in setting for Opus downloads

[sigmarelax]

• I carefully read the contribution guidelines and agree to them.
• I checked if the issue/feature exists in the latest version.

Opus downloads have been left out due to inconsistent support on pre-Android 5.0 devices. This is unfortunate because the audio-only bitrate for most videos in NewPipe is 128kbps, even though Opus@160 is available. Additionally, low bitrate Opus is very efficient and the codec is more free/libre than AAC.

I propose adding a setting for NewPipe that enables Opus downloads (with default=false). Here's a quick mockup: https://i.imgur.com/97Gsjij.png

Opus has been mentioned in other submitted issues, but a similar proposal has not been made. Adding this option for users is appropriate at this point since 80% of all Android devices are on 5.0+. This percentage is likely higher for the install-base of NewPipe and will only continue going up.

[theScrabi]

Sounds reasonable.

[ghost]

I'm honestly surprised this was the reason for leaving it out when Newpipe is supposed to be a libre-alternative to Youtube and libre Opus downloads would have served millions of people just fine.

[theScrabi]

But I remember two years ago when I maped the youtube itags to the corresponding formats that I used a slightly outdated list, and I only mapped a small part of that list. I'm with you tho opus support should be added.

[theScrabi]

will be closed in the sake of #1059