I tried grabbing videos through xdtv and I must say it's a great application. However my TV divx player can't read any of those.
I tried all xvid and ffmpeg4 possibilities.

In order to read the videos on the tv player I have to convert them with AVIDEMUX selecting "mpeg4 (lavc)" in the video encoder. (Avidemux is able to convert all videos created with xdtv)

I can leave with this two passages but it would be great if I could grab it directly with lavc and burn videos directly on cds.