HVX and Blown-out Clipping at DVinfo.net

Tom Reid · July 3rd, 2006, 06:27 AM

We shot two cameras last week for a corporate piece we are producing. Both of our HVX's had clipping on the far right edge when a properly exposed face neared the right edge of the frame. We were under a tent, and the background was blown-out white. We were still very surprised how much information we still saw in the white.

I can't show an example as it involves a celebrity. However, one our monitors here it looks like black blocks along the highlight line. It appeared in both cameras but only on the very edges. Once on the edge of a face and the other on the edges of a fern in the foreground

I've shot several jobs in extreme conditiions and have not seen this before. We were shooting 720P/24PN probably with the shutter at 1/24th?

Anyone else seen this in DVCPRO HD? We didn't see it in the viewfinder or flipout. Maybe it was there, but both of us operating didn't see it. We had a Marshall on one camera that looked fine and we didn't notice it there either. Maybe it was OR WORST, maybe it wasn't which is why I'm posting this.

Thanks,

Tom

Tom Reid · July 7th, 2006, 05:48 AM

Perhaps this is a FCP thing. We have since watched the clips straight in QT and there appears to be no problem. Everything looks like what we shot. It is very consistent with what was seen on the Marshall on location.

So, all we can gather at this point is something within FCP perhaps the graphics card and rendering is causing extreme highlights on the edges of the frame to have fine black blocks crawling for some reason.

Output test was fine when sent for a network approval and dropped down to SD.

If anyone knows what this might be, we'd still appreciate knowing. Footage was 720P/24PN. Editing on dual 2-gig G5/2 gigs ram with recent FCP version.

July 3rd, 2006, 06:27 AM	#1
Tom Reid Regular Crew Join Date: Feb 2002 Location: Orlando, FL Posts: 30	HVX and Blown-out Clipping We shot two cameras last week for a corporate piece we are producing. Both of our HVX's had clipping on the far right edge when a properly exposed face neared the right edge of the frame. We were under a tent, and the background was blown-out white. We were still very surprised how much information we still saw in the white. I can't show an example as it involves a celebrity. However, one our monitors here it looks like black blocks along the highlight line. It appeared in both cameras but only on the very edges. Once on the edge of a face and the other on the edges of a fern in the foreground I've shot several jobs in extreme conditiions and have not seen this before. We were shooting 720P/24PN probably with the shutter at 1/24th? Anyone else seen this in DVCPRO HD? We didn't see it in the viewfinder or flipout. Maybe it was there, but both of us operating didn't see it. We had a Marshall on one camera that looked fine and we didn't notice it there either. Maybe it was OR WORST, maybe it wasn't which is why I'm posting this. Thanks, Tom __________________ Tom Reid TOM REID Motion & Stills tom@trmotionstills.com

July 7th, 2006, 05:48 AM	#2
Tom Reid Regular Crew Join Date: Feb 2002 Location: Orlando, FL Posts: 30	FCP follow-up on clipping... Perhaps this is a FCP thing. We have since watched the clips straight in QT and there appears to be no problem. Everything looks like what we shot. It is very consistent with what was seen on the Marshall on location. So, all we can gather at this point is something within FCP perhaps the graphics card and rendering is causing extreme highlights on the edges of the frame to have fine black blocks crawling for some reason. Output test was fine when sent for a network approval and dropped down to SD. If anyone knows what this might be, we'd still appreciate knowing. Footage was 720P/24PN. Editing on dual 2-gig G5/2 gigs ram with recent FCP version. __________________ Tom Reid TOM REID Motion & Stills tom@trmotionstills.com