Glad that works . Burning subtitles can be a little slow since Mezzmo is burning the subtitles into each video frame of the video, so as you can imagine this will take some time if you have a 1080p HD movie. In this case, faster transcoding can be obtained by providing as much CPU and memory to Mezzmo (and ffmpeg.exe, which is used by Mezzmo to transcode your videos). Try closing down any other programs and you may get some speed improvements.