Audio stuttering on background media playback
Reported by
daniel.s...@gmail.com,
Nov 11
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Issue descriptionPlatform: 11151.17.0 (Official Build) beta-channel cyan Chrome version: 71.0.3578.27 Channel: beta OS Version: 11151.17.0 Flash Version: 31.0.0.135 Steps to reproduce the problem: 1. Open the spotify app or the yt music app (play store app) 2. Minimize it 3. Open the browser and start scrolling/clicking/etc What is the expected behavior? Any audio stuttering should be perceptible What went wrong? The audio starts to stutter a lot, with headphones it is more perceptible. It is even worse when using the touch screen. More: With YT music, if you close the app (It keeps playing the music and shows the status in the notification bar) the stuttering stops. I can't test this with spotify, since it doesn't keep playing the music after I close the app. Afaik, this is a process priority issue. Streaming apps should have a higher priority even if in background.
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Nov 13
Disregard that, thought you were saying something else.
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Nov 13
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Nov 14
It might be that we are taking away too many CPU shares from android when there isn't a foreground app but there is audio playing?
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Nov 14
It's probably that! We could increase/decrease the cpu share value depending on the android app's priority flag. (idk if this is already done) More info: https://developer.android.com/reference/android/os/Process
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Nov 14
Hi Daniel, Thank you for the feedback. I tried to reproduce the issue but failed to minimize youtube app and keep it playing. I am testing on a reef board with latest beta image R71-11151.30. I use youtube app to play video. When I click minimize button on the menu bar, the video playback stops. Apart from background/foreground difference, I can hear noise if I scroll fast enough in another browser window. But if I just scroll with normal speed, there is no stutter noise. Could you let me know how you minimize the app and keep it playing ? There is an issue https://buganizer.corp.google.com/issues/73091832 tracking this priority problem. Some investigation and improvement had been done, but apparently we still have to take care the slower boards and more stressful condition. Thanks!
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Nov 14
I tested it using yt music, but it was more perceptible using spotify in the highest quality setting. But you gave me an idea, I have youtube premium, so I can watch videos even if I minimize the app. I'll test video playback, until now, I was only testing audio streaming. I might also say that the stable channel has a lot less stuttering than the beta channel (the one I was when I created this bug report)
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Nov 14
Just for record: - Stable channel: 70.0.3538.76 - Beta channel: 71.0.3578.27 OBS: I think I don't have the permission needed to visualize the issue in buganizer
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Nov 14
Thank you for the explanation. I can not test youtube music app for now. But I do see more stutter happen when I switch to high quality on spotify. The fact that spotify is minimized does not seem to affect stuttering. The difference between stable channel and beta channel looks like a regression. We will look into it. Thanks!
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Dec 28
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