No audio on some iptv channels

Dear all,

I am using 9.0.2 on RPI 3. there is no audio on some of iptv channels. I think there is codec issue. What might be your suggestion to fix the issue?

PS: There is no sound on analog port on the same channels as well. On iphone sound is ok.

Solved: I found the issue it is related with playlist file.

Thanks...