progressive and motion

Martijn Doornenbal

Martijn Doornenbal

Member
Hi all,

I got my panasonic hvx200 just a week ago and i've done some shooting now. But there is one problem i can't solve.
When shooting in progressive mode and I make a pan or tilt it looks like I have my shutter speed too low. Well, I changed the shutter speed and it still doesn't look right to me. The motion is not smooth like when I shoot in interlaced mode.

It's there in the viewfinder and LCD and when I import my footage in FCp it's there too. I shoot in SD. Still waiting for my P2cards. They can arrive anytime now here in the Netherlands.

Anyone knows a solution for this?
Thanks,
Martijn.
 
The faster the frame rate, the smoother the motion. Try shooting 720/50P and it should be as smooth (even smoother actually) than 50i.
 
Not by any stretch of the imagination, unless you do it very slowly.

25p is a slower frame rate than 50i. It samples motion less frequently, so changes in motion will be nowhere near as smooth as 50i.

25p is the film frame rate in Europe, so you can get film-style motion. 25p will stutter in the same way that film does. Move the camera like a film camera and you'll get film-style motion.
 
Martijn Doornenbal said:
Ok, that explains a lot. I should not treat this camera in 25P mode like a videocam. I will go out now and see how that works.

Thanks!
Click to expand...
Take a moment to dig into an american cinematographer's hand book- there are guide lines in reference section for maximum panning speeds without strobing for various film formats. An HVX isn't film, but it can be progressive scan which is similar to film, so similar rules apply.
Interlace has its temporal frame resolution spread out across 2 time slices: field one and field two, in progessive there is only 1 time slice per frame hence the difference between frames seems more pronounced.

There is no direct translation to HVX from the reference info in the manual, but you should probably look at the relationship between panning speed and focal length to get a general sense of what you have to deal with.
 
Mark is correct, of course, and in the forthcoming HVX Book I have an adapted version of such a chart.

The simplest rule of thumb is that an object should take about six to 7 seconds to cross the frame. Practice panning speeds such that a foreground object takes 7 seconds to go from one edge of the frame to the other, and you should see some glass-smooth pans.
 
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