How can I get the actual web video width and height? #3690

Issue description

We use ExoPlayer version 'r2.4.4' to show videos from Giphy to users. It looks like sometimes a metadata of incoming videos is not correct. We use standard VideoListener to make our video fullscreen achieving "Center crop" effect. As a result, our videos appear "squeezed". The question is if there is a way to get actual video dimensions (because the video is shown correctly in ExoPlayer itself). Also, screenshots from MacBook file info showing correct dimensions of the same file are attached. Another screenshot shows Video debug panel of ExoPlayer demo app that shows incorrect dimensions (152x200) with a strange pixels ratio (1.73).

Reproduction steps

We use usual video listener to get width and height.

exoPlayer.setVideoListener(new VideoListener() {
      @Override
      public void onVideoSizeChanged(int width, int height, int unappliedRotationDegrees,
          float pixelWidthHeightRatio) {
        viewerSurfaceView.setVideoSize(height, width);
        presenter.onVideoSizeChanged(width, height);
      }

      @Override
      public void onRenderedFirstFrame() {
        super.onRenderedFirstFrame();
        exoPlayer.
      }
    });

Link to test content

https://media1.giphy.com/media/9aZ3Snou3bdlu/200.mp4

Version of ExoPlayer being used

r2.4.4 (the same is for 2.6.1)

Device(s) and version(s) of Android being used

Sony Xperia z1 Compact, Android 5.1, Google Pixel Android 8.0, several AS emulators wit Android 6, 7

A full bug report captured from the device

Bugreport captured on Android Emulator API 23 in ExoPlayer demo app
bugreport.txt