Did you try to use another codec than QuiRckTime?
I can't judge how serious this is, but all long GOP formats have trouble with panning. If it is too fast,you can get these problems. Pans with long GOP formats must be real slow.
Harm is correct; pannning with long GOP AND 24 or 25 fps has to be real slow or it will be blocky.
But;if the source is smooth and not the export then it must be the encoding choices. In your example it looks like your source was interlaced bt you exported progressive.
When I use footage interlaced, I can't export to progressive?
If I can, how can I do it?
If you want P, why don't you shoot P? Converting from i to P will result in quality loss.
But what's the difference between interlaced and progressive?
When should I use one or another?
When I selected "HQ 1920X1080 (25 Progressive)" on SONY EX3, the image seem like it has flicker when I move left or right...that's why I always used "HQ 1920X1080 (50 interlaced)". This way I have a clear image.
Can you explain me the difference? And why a see that flicker on the monitor of the camera when I use 25p?
A simplistic answer is this:
25 progressive frames is 25 full frames of video per second
25 interlaced frames is 50 fields per second; each with half the information but 50 fields.
This is why interlaced footage looks smoother when you pan than progressive; more fields per second to capture the movement.
If you observe PANs on TV you will notice they are usually very slow; unless they are fast on purpose to blur for for an affect.
So; if you reduce to 25 progressive frames per sencond the pan has to be very slow to not be blocky. Pro camera men are trained for this slow camera movement.
Edit: Heres a website with more detail:
Another simple answer: I use Progressive when shooting things with little motion; Interlaced if I know there is lots of motion.
A side issue; In CS4 Pr is very bad at scaling HD interlaced footage down to SD footage. So, If if know I will be scaling down I may elect to shoot Progressive, simple because Pr does a better job scaling it down to SD if needed. But this is a peculiarity with PR not an industry wide reason to shoot progressive. Hopefully the next ver of pr fixes this problem.