Viera TC-L43E30 problem scrubbing mkv files

Hello, I love your media server. But I have this problem and I don't know if it's a problem with the TV or the server. I play an mkv file to the TV with transcoding set up but when I fastforward it moves incredibly slow and freezes after a minute or two (meanwhile barely making and progress in fastforwarding). I can't find any errors in the logs.

Anyone have any idea how to debug this?

[zip]

You have to enable the transcoding to do it's job. If you start ffwd too soon it'll eventually scrub into the part of the file that has not been transcoded yet and the Tv has to wait for it.