Serviio

On my samsung D5300 the FF is very slow it FF for 10 sec and if you hold the button down for a little while, it will advance maybe 1.5 - 2 minutes then it starts playing at normal speed.

I would love to be able to change the 10 seconds to something like 60 secs. What would be great would be the ability to set it per device in the serviio console.

Not sure that could be done.
Upnp/DLNA is a client/server , master/slave architecture.
This is the Samsung device that request fast/forward, serviio server simply response to the device request.
Zip you confirm?

Yep, cannot be done. It's the device that asks for certain video range, so it's up to them to implement a decent ff/rew functionality.

That is my luck lol. I wonder if it would fast forward on non transoded files.