I figured it out myself. So if anybody ever wounder how its done here it is:
There is no app that will let you encode a videofile to a .ts
You will have to encode the file to a video-only mpeg-file and the sound to a sound only acc-file. You can do that with compressor or adobe media encoder.
then yo need a multiplexer app to mux those two streams to a .ts-file. A good such app is: VideoReDo
cheers