No fast forward about 2x speed in the DVD-Player

hello,
if I burn my Home videos of hard disk on DVD (Verbatim) or (Sony) has I with the DVD-Player only one fast forward of 2x speed. If I switch to 4x speed, the video stops and jumps after some time to the next chapter. If I am of use CloneCD, Nero or whatever the videos function easily.
Ripped Movis also function easily at 4x 8x 20x speed.
Where is the problem?
bye Ofenheizung