Moving Camera Yields Glitchy/Flickering Footage at DVinfo.net

Brandon Hammonds · August 26th, 2008, 10:54 PM

Can someone tell me what is happening here? (password is "wtf")

60i / Shutter at 60 / everything Manual / stabilization off

Captured 60i via cineform. Exported to h.264 via adobe media encoder. Tried every possible combination of h.264 export settings.

Thanks for the help.

Adrian Stucker · August 27th, 2008, 12:02 AM

When you export to h.264, what is the key framing set to? default is 24, try setting it to 1 first. It will take much longer to render, but if that solves it, then try changing the key frame rate to 23 or go up to 30. I believe it's a render issue. does it do this with other formats?

btw, looks great, using a jib? what kind?

Bill Busby · August 27th, 2008, 12:51 AM

I don't know if this applies to Cineform and/or Adobe Media Encoder, but Quicktime defaults to keyframe every 24 frames & for the Animation codec, this would be correct. But for NTSC I've read it should basically be 10 times the frame rate... 30fps = key frame every 300 frames. It may be different for a h.264 codec though.

Just curious, why would you capture 30p with 60i footage? Why not just shoot 30f to begin with?

Brandon Hammonds · August 27th, 2008, 09:41 AM

Thanks, guys. I'll play with the keyframes.

Adrian, when I exported to .wmv I did not have the issue. As for the jib, I'm using the camcrane 200.

Bill, I don't know what I was thinking -- I did capture 60i.

August 26th, 2008, 10:54 PM	#1
Brandon Hammonds New Boot Join Date: Jan 2008 Location: San Antonio, TX Posts: 22	Moving Camera Yields Glitchy/Flickering Footage Can someone tell me what is happening here? (password is "wtf") 60i / Shutter at 60 / everything Manual / stabilization off Captured 60i via cineform. Exported to h.264 via adobe media encoder. Tried every possible combination of h.264 export settings. Thanks for the help. Last edited by Brandon Hammonds; August 27th, 2008 at 09:41 AM.

August 27th, 2008, 12:02 AM	#2
Adrian Stucker New Boot Join Date: Aug 2008 Location: Cincinnati, Ohio Posts: 13	When you export to h.264, what is the key framing set to? default is 24, try setting it to 1 first. It will take much longer to render, but if that solves it, then try changing the key frame rate to 23 or go up to 30. I believe it's a render issue. does it do this with other formats? btw, looks great, using a jib? what kind?

August 27th, 2008, 12:51 AM	#3
Bill Busby Major Player Join Date: Dec 2006 Location: Los Angeles, CA Posts: 959	I don't know if this applies to Cineform and/or Adobe Media Encoder, but Quicktime defaults to keyframe every 24 frames & for the Animation codec, this would be correct. But for NTSC I've read it should basically be 10 times the frame rate... 30fps = key frame every 300 frames. It may be different for a h.264 codec though. Just curious, why would you capture 30p with 60i footage? Why not just shoot 30f to begin with?

August 27th, 2008, 09:41 AM	#4
Brandon Hammonds New Boot Join Date: Jan 2008 Location: San Antonio, TX Posts: 22	Thanks, guys. I'll play with the keyframes. Adrian, when I exported to .wmv I did not have the issue. As for the jib, I'm using the camcrane 200. Bill, I don't know what I was thinking -- I did capture 60i.