VideoView.setMirror(false) behaves inconsistently between front and back camera on Android

[yuexunshi]

Description

When using LiveKit Android SDK, I noticed inconsistent mirroring behavior between the front and back camera.

Expected behavior

Calling:

videoView.setMirror(false)

should disable mirroring for both front and back cameras.

Actual behavior

Front camera: still mirrored

Back camera: not mirrored

If I call:

videoView.setMirror(true)

Front camera: looks correct

Back camera: becomes mirrored

So the mirror flag seems to be applied on top of an already mirrored front camera frame.

Result

It is currently impossible to make both front and back cameras non-mirrored using setMirror() alone.

Environment

Platform: Android

LiveKit SDK: last

[yuexunshi]

I would like to know how to configure the LiveKit Android SDK so that both the front and back cameras are not mirrored.

[binkos]

Hi @yuexunshi, you can't turn off mirroring for both cameras by one flag.
Because frames that captured by Front Facing Camera are mirrored in Camera1Session(line 223), Camera2Session(line 299), CameraXSession(inside surfaceTextureListener, lines from 95 to 103), when back frames from BackFacing - not

At our project we detect which camera is active and use it to mirror frames or not