Video plays with a green bar below the bottom of the video

[troys-code]

Video URI: https://mobile-plugins-demo-files.s3.eu-central-1.amazonaws.com/mp4/pad.mp4

Expected behaviour

Video plays with no green bars shown.
For example, like this in Chrome - see Screenshot_chrome.

Actual behaviour

Video plays with a green bar below the bottom of the video.
See Screenshot_exployer_demo.

Additional info

adb bugreport:
bugreport-OnePlus6-QKQ1.190716.003-2021-05-28-19-23-01.zip

• ExoPlayer version number: 2.14.0
• Android version: 10
• Android device: OnePlus 6
• The video was recorded by an iPad 6th Gen. This issue can also be reproduced with videos recorded by an iPad 11-inch Pro.
• This happens consistently with every video recorded by an iPad. These videos are created using iOS media apis (not the built-in screen recorder).

[marcbaechinger]

I can repro this only with the ExoPlayer GL demo app on a real device (Pixel/Android 10 and Pixel 4/Android S). With emulators (Pixel XL/API 30 and Galaxy Nexus/API 30) the video is rendered correctly with the ExoPlayer GL demo app as well as with the normal demo app.

Can you confirm you are seeing this on the GL demo app only?

I think we need to look into this anyways and see why the ExoPlayer GL demo app does render it this way on some devices. I think @andrewlewis is the best person to check whats behind this. May I ask you to take a look?

[troys-code]

I can confirm this only happens in the GL demo app.

We're using ExoPlayer.setVideoSurface to play videos inside a game engine, so I think Open GL rendering is required in our specific case.

[andrewlewis]

It looks like this is caused by not applying the transformation matrix from SurfaceTexture.getTransformMatrix.

[ojw28]

This should be fixed by the commit referenced above.