Hi,
At the moment, changing the frame rate is not available thru the EMS transcode API. We may add this feature in a future release, but right now it’s unsupported. If you really want to make modifications yourself, you can take a look at the "emsTranscoder.bat" batch file for Windows, or the "emsTranscoder.sh" script for Linux, to see how transcoding is done by the EMS.
Cheers,
Don