ffmpeg engine - how to add matting to 3:4 videos for 16:9 screens

[psychicmind]

I'm totally confused as to where and what "ffmpeg engine" is.

I would like to convert my 3:4 DVDs for 16:9 screens. I need to add black matting to the sides to keep ffmpeg from stretching out the image. After looking in the manual, I see this feature is only enabled for "ffmpeg engine"

Where and what is "ffmpeg engine" and how do I get it

Thanks

[psychicmind]

never mind - found it