[camera] [Android] Stale images are being emitted after restarting an image stream #54837
Description
Steps to Reproduce
- Update the
cameraplugin example with the following files so you can actually "see" the bug https://gist.github.com/topnax/20e88a9afec8dbf64a8674257c4db837#file-main-dart-L228 - Launch the example and select the rear facing camera (might happen for front facing camera as well, but I haven tried this out)
- Start an image stream using the new button that I added in the updated file (an
IconButtonwith an image icon). First 5 images from the image stream are saved into local storage of the device, theCameraPreviewmight be lagging a little bit as some conversion is happening on the UI thread but it has no effect on this issue. After processing 5 images the stream is stopped. - Have a look at the first 5 images received from the stream which are stored in the folder
/storage/emulated/0/Android/data/io.flutter.plugins.cameraexample/files/ - Point the camera towards a different scene and start another an image stream using the button with the image icon
- Have a look at another first 5 images received from the second stream which are stored in the folder
/storage/emulated/0/Android/data/io.flutter.plugins.cameraexample/files/. You can see that the first image that was saved is actually from the first stream capturing the previous scene.
Expected results:
After subscribing to the image stream for the second time I expected to see images from the second scene.
Actual results:
Images from the first scene.
Running "flutter pub get" in camera... 0.4s
Analyzing camera...
No issues found! (ran in 2.1s)
[✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Linux, locale en_US.UTF-8)
• Flutter version 1.12.13+hotfix.8 at /home/topnax/Android/flutter
• Framework revision 0b8abb4724 (9 weeks ago), 2020-02-11 11:44:36 -0800
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[✓] Connected device (1 available)
• ONEPLUS A6003 • 89e7d117 • android-arm64 • Android 10 (API 29)
! Doctor found issues in 2 categories.