MediaPlayer + GLSurfaceView black screen but with sound?

Question

Android

Hello.
There is a custom player based on MediaPlayer and GLSurfaceView, which processes video on the fly with the help of opengl, but on MODECOM FreeTAB 8001 IPS X23G, when playing video from the card, it shows a black screen with sound. At the same time, it loses well from the Internet, I tested it on the same video that is played via the Internet
, neither errors nor exceptions are thrown
.
Has anyone experienced this, thanks in advance