30p or interlaced for Green Screen at DVinfo.net

Ron Little · May 14th, 2009, 07:54 AM

Does anyone have any experience shooting Green Screen with the Sony HVR-V1?

My question is should I shoot 30p or interlaced?

Ken Campbell · May 17th, 2009, 01:44 AM

I would suggest shooting in progressive for greenscreen work. It makes for better keys and less work in post. I also shoot with no picture profiles on.

Jon Shohet · May 19th, 2009, 12:23 PM

I second those recommendations, and would also add to use a low sharpening setting, definitely not anything over 3.
If you can capture directly to file via blackmagic, uncompressed, bypassing the HDV compression, that would make the most dramatic improvement. HDV 4:2:0 has poor color information for chroma keying, whether it's progressive or interlaced.

Ron Little · May 19th, 2009, 12:52 PM

Thanks guys. Now that is two for progressive scan. I should have my screen set up tomorrow and the shoot is Friday. I should have time to do some test. Jon have you used the Black Magic Intensity HDMI capture card? If so please tell me what your work flow is.

Troy Teuscher · May 19th, 2009, 02:27 PM

I've been doing a lot of Green Screen work lately - both 720p30 and 1080p30. HDV keys much better than DV so even if you don't capture with the Black Magic card you'll be okay. And shoot progressive - it's easier to get a good key.

Jon Shohet · May 19th, 2009, 02:37 PM

Sorry Ron. My advice regarding Uncompressed vs. HDV comes from my experience as a compositor, and working with a 4:4:4 source really does make a difference.
However the only times I have personally used the V1 for greenscreen work were on very small projects where setting up an intensity capture station was not an option, so I can't really help on this one.
Hopefully someone else will jump in.

Ken Campbell · May 19th, 2009, 11:30 PM

Hi Jon, I think when you set the picture profile to OFF it also removes the sharpness. Can anyone confirm?

Ron Little · May 20th, 2009, 05:40 AM

As far as I can tell when you turn the picture profile to off you lose the ability to tune the picture at all.

Jon Shohet · May 21st, 2009, 04:33 AM

Quote:

Originally Posted by Ken Campbell

I would suggest shooting in progressive for greenscreen work. It makes for better keys and less work in post. I also shoot with no picture profiles on.

My bad... I was thinking of Cinematone Gamma/Colors, which should definitely be turned off for greenscreen or any shots that you know will require significant post. Black Compensation as well. I actually keep picture profiles on so I can manually control sharpness, color level and knee point. Maybe it is better to just turn them off completely...?

I'm really not sure what happens to knee point and sharpness when you turn off picture profiles. Default for sharpness is 7 - so when you turn off PP does the camera revert to this or does it remove sharpening alltogether? Does knee point revert to "Auto" ?

Ron Little · May 24th, 2009, 07:21 AM

I want to thank everyone for their input you really helped me make the decision to shoot 30p with no picture profile turned on.

The shoot went well the shots look great. As far as the key I will not be doing the compositing so that one is out of my hands. It goes off to some where in Atlanta for that.

May 14th, 2009, 07:54 AM	#1
Ron Little Major Player Join Date: Feb 2003 Location: Pensacola Fl. Posts: 627	30p or interlaced for Green Screen Does anyone have any experience shooting Green Screen with the Sony HVR-V1? My question is should I shoot 30p or interlaced?

May 19th, 2009, 02:27 PM	#5
Troy Teuscher Regular Crew Join Date: Jan 2007 Location: St. Louis, MO Posts: 31	Shoot Progressive I've been doing a lot of Green Screen work lately - both 720p30 and 1080p30. HDV keys much better than DV so even if you don't capture with the Black Magic card you'll be okay. And shoot progressive - it's easier to get a good key.

May 17th, 2009, 01:44 AM	#2
Ken Campbell Regular Crew Join Date: Apr 2008 Location: Milan, Italy Posts: 140	I would suggest shooting in progressive for greenscreen work. It makes for better keys and less work in post. I also shoot with no picture profiles on.

May 19th, 2009, 12:23 PM	#3
Jon Shohet Major Player Join Date: Dec 2007 Location: London, UK Posts: 277	I second those recommendations, and would also add to use a low sharpening setting, definitely not anything over 3. If you can capture directly to file via blackmagic, uncompressed, bypassing the HDV compression, that would make the most dramatic improvement. HDV 4:2:0 has poor color information for chroma keying, whether it's progressive or interlaced.

May 19th, 2009, 12:52 PM	#4
Ron Little Major Player Join Date: Feb 2003 Location: Pensacola Fl. Posts: 627	Thanks guys. Now that is two for progressive scan. I should have my screen set up tomorrow and the shoot is Friday. I should have time to do some test. Jon have you used the Black Magic Intensity HDMI capture card? If so please tell me what your work flow is.

May 19th, 2009, 02:37 PM	#6
Jon Shohet Major Player Join Date: Dec 2007 Location: London, UK Posts: 277	Sorry Ron. My advice regarding Uncompressed vs. HDV comes from my experience as a compositor, and working with a 4:4:4 source really does make a difference. However the only times I have personally used the V1 for greenscreen work were on very small projects where setting up an intensity capture station was not an option, so I can't really help on this one. Hopefully someone else will jump in.

May 19th, 2009, 11:30 PM	#7
Ken Campbell Regular Crew Join Date: Apr 2008 Location: Milan, Italy Posts: 140	Hi Jon, I think when you set the picture profile to OFF it also removes the sharpness. Can anyone confirm?

May 20th, 2009, 05:40 AM	#8
Ron Little Major Player Join Date: Feb 2003 Location: Pensacola Fl. Posts: 627	As far as I can tell when you turn the picture profile to off you lose the ability to tune the picture at all.

May 24th, 2009, 07:21 AM	#10
Ron Little Major Player Join Date: Feb 2003 Location: Pensacola Fl. Posts: 627	I want to thank everyone for their input you really helped me make the decision to shoot 30p with no picture profile turned on. The shoot went well the shots look great. As far as the key I will not be doing the compositing so that one is out of my hands. It goes off to some where in Atlanta for that.