Preview reduce size to the video resolution when recording with filter

[buntupana]

In Emulator and Samsung Galaxy S6 when I try to record a video with a filter the preview will reduce size to the video resolution, in the case of the example to 1280x720

When I change the filter the Preview will fit the screen again, but reduce when start recording.

I've tried to debug and find the error but I couldn't :(

Here the example: