Feature suggestion: Closest match default bitrate

[stevendesu]

Presently there are two options for default bitrate: low and high. I have a broadcast with:

• 270p
• 480p
• 540p
• 720p
• 1080p

I wish to default to 480p, but low sets it to 270p and high sets it to 1080p

I would prefer if I could do something like:

default: 480

If there is no "480p" then this could find the closest match (540p in my case)