mts files from Panasonic to mpeg file

[shh1cd]

Hello Video experts,
I have two different video file formats from two different cameras.
One is from Panasonic that has 1280 by 720 with 59.94 fps. (mts file format)
The other is from Sony that has 1920 by 1080 with 29.97 fps. (mpeg file format)
In other to combine these two clips, I am supposed to convert mts files to mpeg.
Am I correct? If so, what is the best way to achieve this conversion.

Is there any way I can convert them for free but not use scripting?
Am I asking too much? Could you share your wisdom?

[Baldrick]

Isn't this same as https://forum.videohelp.com/threads/353963-combine-two-videos-that-have-different-fps?p=2224508 ????