It seems once data rate limit has been set, it cannot be changed. When not setting data rate limit changing bitrate seems to work.

Still no feedback?

@Apple Any feedback on this?

It's broken in iOS 27 Beta 5 as well.

Yeah the average is lower than configured in kVTCompressionPropertyKey_AverageBitRate. Typically the app changes the target bit rate quite frequently to adapt to cellular network conditions, which may have some significance to the problem. I tried increasing the data rate limits, but didn't seem to help. On iOS 26 and older, the encoder outputs data at configured target bit rate. Feedback ID: FB23692301 There is also a discussion at discord: https://discord.com/channels/1146357402250260580/1517450179282731008 Discord invite link: https://discord.gg/kh3KMng4JV

I submitted using the Feedback app a few days ago, but it seems you guys at Apple never respond to those. I have submitted three, and none has been addressed. I'll not submit more details as it taks lots of effort, and I doubt you'll look at it, sorry. Here is my project: https://github.com/eerimoq/moblin

Just tested switching mic using the Control Center in iOS 26, and that works! I noticed the new AVInputPickerInteraction in iOS 26, which looks promising, but there is a slight catch. My app is a streaming app, and users would like to switch mic automatically when switching "scene/camera". It's not suitable to present a picker every time that happens, so would be awesome if the mic selection could be done in code (in Swift).

I got it working after copying all sample buffer metadata. Somehow it must have been modified somewhere in my code and that occasionally made recording break.