.NET MAUI Media Recorder Sample - Android

Sample code to test using MediaRecorder to record video. Fails at start recording.

  //Context context = Android.App.Application.Context;
  // CA1422: This call site is reachable on: 'Android' 35 or later.
  // GHCopilot:This is a warning that the code may not work on older Android versions.
  // 'MediaRecorder is obsoleted on 'Android' 32 or later.
  /*
    An API that's marked with ObsoletedOSPlatformAttribute is called from a
    call site that's marked as supporting the obsoleted operating system (OS).
    This rule is similar to CA1416: Validate platform compatibility 
    except that it warns about APIs that are obsolete on a given platform 
    versus unsupported entirely.
  */

When I try to start video the phone beeps and I get the message as above. I note though that the file is created

Fails at this point:

  _mediaRecorder.Prepare();
  _mediaRecorder.Start();  <-- Fails here

Error Message:

  [MediaRecorder] start failed: -22
  [0:] RuntimeException: start failed.

Its a Java.Lang.RuntimeException

GitHub Copilot Suggests:

The beep typically signals that the camera hardware is locked or unavailable. While the file creation confirms that the recorder was partially prepared, it seems like the camera source wasn't properly acquired before recording started. This may happen due to:

1. Another application or process using the camera.
2. A race condition where the camera isn't fully initialized before _mediaRecorder.Start() is called.

Reset the phone before running app. No change, so not 1. 2. Put a 5 second delay, still fails:

[0:] RuntimeException: start failed.
[MediaRecorder] start failed: -22
[Choreographer] Skipped 472 frames!  The application may be doing too much work on its main thread.

And a longer delay

[MediaRecorder] start failed: -22
[Choreographer] Skipped 2466 frames!  The application may be doing too much work on its main thread.
[HWUI] Davey! duration=27374ms; Flags=0, FrameTimelineVsyncId=181826,

Maybe have to fork it off to another thread ?? Have though noticed that some of controls relying on permisssions only work in the main thread.

Footnote

• As suggested in Pull Requests, changed the TargetFramework slightly, still not working.
• Also separated Video Setup from Video Start.
• Have had a L-O-N-G conversation with GitHub Copilot on this, going around in circles at times! Think I reached its limits! If it hasn't been thoroughly done, publicly, previously, then it can only help incrementaly! Try-this...try-that!

? PS: Why isn't there a Video Capture example in the CommunityyToolkit.Maui?