Issue when accessing hardware h264 decoder

[c0ff330k]

Software Versions

• Python: 3.10
• OS: Android
• Kivy: v2.1.0
• Kivy installation method: Buildozer

Describe the bug

I am developing android app with kivy and ffpyplayer for watching video streams.
But i'm using low performance hardware and getting lag on streams with 2500 bitrate and higher, so I decided to use hardware accelerated codecs like h264_v4l2m2m.
I add 'vcodec': 'h264_v4l2m2m' parameter of MediaPlayer in kivy.core.video.video_ffpyplayer.py but get this issue:

12-28 00:44:29.802  2065  2138 I python  : [ERROR  ] [ffpyplayer  ] [h264_v4l2m2m @ 0x7b181c6100] can't configure decoder
12-28 00:44:29.803  2065  2138 I python  : [CRITICAL] [ffpyplayer  ] Failed to open file 'http://213.145.131.243:80/cam1/stream.m3u8' or configure filtergraph
12-28 00:44:29.787  2138  2138 W Thread-6: type=1400 audit(0.0:25): avc: denied { read } for name="/" dev="tmpfs" ino=7196 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:device:s0 tclass=dir permissive=0

I found some information about this issue and it seems that

W Thread-6: type=1400 audit(0.0:25): avc: denied { read } for name="/" dev="tmpfs" ino=7196 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:device:s0 tclass=dir permissive=0

is a SELinux denial. So SELinux blocks ffmpeg when trying to access the hardware codec but I don't understand why this is happening.

I also post this issue here: matham/ffpyplayer#137 because I don't know it is ffpyplayer or kivy problem.

[misl6]

Not an issue on Kivy side, if the codec is usable on Android, the issue should be addressed on python-for-android or ffpyplayer.