Some channels picture are freezing, how to solve?

Our IPTV can run perfect with over 90% android device in the market.
But there is still with some boxes/devices firmware would be not good with IPTV apk, some channels would be freezing during watching.
Here the solution: go to apk setting to try software/hardware decoding: MISC-Decoind Model-Software/HardWare docoding.
This kind freezing problem mostly can be solved.