So just a quick update. I pushed out the 1.5 release of Transmageddon today. No major new features just fixing a regression in terms of dealing with files where you only have a video track or where you want to drop the audio track as part of the transcoding process. I am also having some issues with Intel Hardware encoding atm, but I think those are somewhere lower in the stack, so I hope to file a bug against either GStreamer or the libva project for that issue, but for now I recommend not having the Intel VA plugins for GStreamer installed.
As always you find the latest release on linuxrising.org.
I also submitted a Transmageddon update to Fedora 21, so if you are a Fedora user please test the build there and give it some Karma