How to get rid of picture spills while watching and switching IPTV channels at the same time?

Question

linux

The provider provides IPTV (multicast). Asus RT-N16 router installed with Tomato (Toastman) firmware. IPTV is distributed to the local area using igmpproxy and udpxy.
If you open 2 players (on the same PC, on different PCs, both via udpxy, both via igmpproxy, one via igmpproxy, one via udpxy), start watching channels and start switching channels on one player, the picture on the second player starts to crumble at the moment of switching.
Without a router, there is no such effect.
The udpxy and igmpproxy versions are the latest.
What could be the problem? How to decide?

Answer 1

Try enabling IGMP Fast Leave.
I believe that your router is slowly unsubscribing from the multicast group and at the moment of switching, more than 2 multicast streams are pouring, with which it cannot cope. IGMP Fast Leave, in theory, will allow you to quickly unsubscribe from a multicast group and either you minimize the consequences, or there will be none.