HV30 Strobing or Rolling shutter? Are they the same?

[thabo]

I am posting this question on DVXuser as I did not get a good answers on hv20.org - Here is my original post:

I have had my HV30 since Christmas and have noticed what can only be described as flickering or strobing when doing a pan. I shoot for the web, 30p. I've read the various posts about locking some of the setting down with the photo button as well as the rolling shutter issue but this seems like plain old strobing / flashing. I shot the same scene going through all the manual modes of the Camera changing shutter speed, F stop and others etc. but on playback the same flashing was seen. Only 60i gave me no flashing with the same pan speed.

So do I really have to pan that slowly to get rid of it. I've also read that it's inherent to the HDV format? Was the background too bright perhaps?

On the HV20.org message board they simply dismissed it as rolling shutter and cut off the post, nice!! http://hv20.com/showthread.php?t=24287. The link to this message board didn't really give a clear answer neither did a search on the hv20.org boards. I was under the impression rolling shutter caused a wavy effect / ripple effect similar to the bad image stabilization in cell phone video cameras, not flashing and strobing?

[Barry_Green]

Sounds like 24p strobing, and yes, you really do have to pan that slowly. On full wide angle you should take about 20 seconds to execute a 90-degree pan, if you want to do it in 24p and strobe-free.

Has nothing to do with the HDV format or anything like that, it has to do with the slow sampling rate of 24fps footage. The exact same issue will happen on a $350,000 Sony F35, on a 35mm film camera, or on an HV30: 24fps is 24fps, and you have to respect the frame rate.

As a simple rule of thumb, a strobe-free pan rate would require that an image take about 7 seconds to cross the screen. Try panning at that rate and see if you get acceptable smoothness. If you do, well, welcome to 24p shooting...