BuddyLReno commented on issue #197: Add durationUpdate callback URL: https://github.com/apache/cordova-plugin-media/pull/197#issuecomment-439426503 Yes, I can elaborate. In the newer versions of android, after about five minutes of background activity, android shuts down the web container that is running the app. So when you try to use a background task to query for the duration with a `setTimeout` as is described in the docs, that setTimeout never actually runs. This occurs even if you use a plugin like cordova-plugin-background-mode. What I mean by subscribing, is basically just attaching a callback to allow the native code to run the callback when the audio player assigns duration. By doing this, you always get a real duration and don't have to worry about getting a "-1" duration as it only reports the duration after the audio player actually initializes and has the real duration. This removes the need to query for duration with a setTimeout, which prevents the situation above from happening. Does that help?
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