Frame accurate capture at DVinfo.net

Jaromir Pesr · October 15th, 2005, 06:06 PM

Hello,
I'm just curious. Is anybody able to do frame accurate capture from Z1 camcorder using PPRO 1.5.1 and AHD 3.3? I'm not. The Cineform Aspect HD specification says there is a "Frame-accurate batch capture using the Adobe Premiere Pro capture interface". But I always get several frames (and every time different) later on in-point and even several seconds later on out-point. Is it my system (dual 3.6 Xeon, 2Gig RAM, fast RAID0, LaCie Firewire) wierd limitation or is it practicaly not possible?
Thanks for any comment

Daniel Rudd · December 9th, 2005, 10:36 AM

I just found your post in a search. I have the same problem. Are we missing something?
David? care to comment?

David Newman · December 9th, 2005, 10:43 AM

It is actually not a bug and is working correctly. Aspect HD always captures with handles, some of which is required by the GOP structure of the source MPEG, some we throw in for good messure. In a conform situation handles cause no problems, they common and typically useful, the timecode on the recapture is frame accurate. If the frame you request starts at 00:15:15:15, we might capture some frame before this but the timecode for the needed frame will match.

Michael Stewart · December 9th, 2005, 06:48 PM

Here is a batch capture tip, remove all transitions, speed changes, etc. when you create an EDL, it works perfect for straight footage, but does wierd things when you do anything with the clip (ie above and also reverse clip stuff)

Mike

Daniel Rudd · December 12th, 2005, 10:45 AM

thanks David for the quick response.

I thought there might be a "handles" setting in Cineform so I set up three captures of equal durations.

Then when it captured them two where the same and one was different.

This test was less than scientific, so let me try again with more clips. I'll let you know what I find.

October 15th, 2005, 06:06 PM	#1
Jaromir Pesr Regular Crew Join Date: Apr 2005 Location: Prague, Czech Republic Posts: 42	Frame accurate capture Hello, I'm just curious. Is anybody able to do frame accurate capture from Z1 camcorder using PPRO 1.5.1 and AHD 3.3? I'm not. The Cineform Aspect HD specification says there is a "Frame-accurate batch capture using the Adobe Premiere Pro capture interface". But I always get several frames (and every time different) later on in-point and even several seconds later on out-point. Is it my system (dual 3.6 Xeon, 2Gig RAM, fast RAID0, LaCie Firewire) wierd limitation or is it practicaly not possible? Thanks for any comment __________________ Jaromir Pesr i/o post

December 9th, 2005, 10:36 AM	#2
Daniel Rudd Major Player Join Date: Aug 2005 Location: North Muskegon, MI Posts: 213	anybody else? I just found your post in a search. I have the same problem. Are we missing something? David? care to comment? __________________ Daniel Rudd Digital Storyteller (Sony HDV, Aspect HD) Soundtrack Creation & Royalty Free Music Production www.stock20.com

December 9th, 2005, 10:43 AM	#3
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	It is actually not a bug and is working correctly. Aspect HD always captures with handles, some of which is required by the GOP structure of the source MPEG, some we throw in for good messure. In a conform situation handles cause no problems, they common and typically useful, the timecode on the recapture is frame accurate. If the frame you request starts at 00:15:15:15, we might capture some frame before this but the timecode for the needed frame will match. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

December 12th, 2005, 10:45 AM	#5
Daniel Rudd Major Player Join Date: Aug 2005 Location: North Muskegon, MI Posts: 213	thanks David for the quick response. I thought there might be a "handles" setting in Cineform so I set up three captures of equal durations. Then when it captured them two where the same and one was different. This test was less than scientific, so let me try again with more clips. I'll let you know what I find. __________________ Daniel Rudd Digital Storyteller (Sony HDV, Aspect HD) Soundtrack Creation & Royalty Free Music Production www.stock20.com

December 9th, 2005, 06:48 PM	#4
Michael Stewart Major Player Join Date: Jun 2003 Location: Spokane, Wa. Posts: 445	Here is a batch capture tip, remove all transitions, speed changes, etc. when you create an EDL, it works perfect for straight footage, but does wierd things when you do anything with the clip (ie above and also reverse clip stuff) Mike