System screen recorder doesn't capture audio in Oboe sample apps

[meteaurestudios]

Android version(s): 14 Android device(s): Pixel 8, Pixel 4a 5G Oboe version: 1.8.1 App name used for testing: hello-oboe

Short description

Audio is not captured from the Android built-in screen recorder, despite having activated the option

Steps to reproduce

• Build and launch hello-oboe
• Tap the screen to ensure sound is produced from the app
• In the Android quick settings, tap the "screen record" tile
• Toggle the "device audio" switch to on
• Start recording, while tapping the screen in hello-oboe to produce sound

Expected behavior

• Watch the recorded video --> we should hear sound as it was played realtime

Actual behavior

• Watch the recorded video --> no sound captured

Device

Reproduced on:

• Pixel 8
• Pixel 4a 5G

Any additional context

Other Oboe samples apps feature the same issue. It's interesting to note that on Pixel 8, audio is captured in Koala Sampler, which uses Oboe.

[philburk]

This is being tracked internally at b/300121986 | P2 | AAudio MMAP not captured in Screen Recording

If AAudio is using Legacy then it can be captured.

[meteaurestudios]

Thanks for the update Phil. Any chance we can follow it from a ticket or something ?

[philburk]

There was a partial fix in Android 15. If Screen Recording is started, then an Oboe/AAudio stream is opened, then AAudio will use Legacy mode. So the audio will be recorded.

If the order is reversed, and the Oboe/AAudio stream is opened before the Screen Recording is started, then the stream is already MMAP and will not be recorded. We are working on fixing that for a future release.

[meteaurestudios]

Ok, thanks for the tip on the partial fix. I'll try that when I'll update to Android 15 :)