Help with converting to mp4 for my iPod?

[Abeled]

Yesterday I downloaded Moyea video converter to convert swf (flash) files to mp4 for my iPod. The converter works fine and the videos come out in excellent quality when I try playing them on my iTunes, but when I put them on my iPod it only played audio and showed a black screen.

Does anyone know what I might be doing wrong?

[badboykilla]

best converter for mp4 i use is cucusoft but its not free. u have to buy it