That is why i keep most media as AVC/ACC mp4s. So to avoid transcoding. All video is 1080p or less. On a 1 Gb line.

Jellyfin on arch behind nginx. I connect with VPN, through NAT or on the local network. What else to say? I have noticed that syncplay is significantly more reliable through nginx. Not sure why that is. But it is still fragile. I’ve had this issue unresolved so long that I am just living with it. If it works, great. If it doesn’t, then i don’t use it.

Clients: firefox, jellyfin client, chrome, android client. The issue is pretty consistent across them all.

I mostly keep 8bit AVC/ACC, 2-channel mp4s. Some h265 as well. I have not noticed a pattern. Syncplay seem agnostic to encodings and filetypes.

I get the feeling that i am far from alone on this issue. There are threads out there.

Jellyfin ia great! But syncplay breaks if you snease.