@kat I have absolutely no idea, but I wouldn't be surprised if it uses the closest full image after your cut point and not the one before. Hence, the deltas between the two full images have nothing to really refer to. So, the video player just shows the first full image it finds and "freezes" the image until the video stream actually hits it.
Let me try to visualize it, |
represent full images, .
just subsequent deltas:
Original start of video
↓
|......|.....|........|......|..
↑ ↑
Cut point Cut point
Resulting video:
....|.....|........|....
↑↑↑↑
This is where it freezes
Could be complete bullshit, though. Wouldn't be the first time that I'm wrong. :-)
I'm just curious, what exact command line do you use to cut the video?