Conversion of mp4 files to trec file format

You cannot produce Camtasia videos (.trec) from just any video source (like .mp4) with some simple converter, not even the original program has this function, which means direct mp4 to trec conversion is not possible. At best you could playback the .mp4 file using some media player (in full screen) and record the screen using Camtasia to produce the recording.

Open MP4 file    Open TREC file