Recording Times vs. Recording quality at DVinfo.net

Dave Morrison · August 10th, 2008, 09:11 PM

This might be a really dumb question, but why is it that my 8 gig cards always record only 28 minutes regardless of the recording quality setting? Why wouldn't the file sizes drop somewhat when I use the lowest quality setting on my EX1?

Paul Kellett · August 11th, 2008, 02:23 AM

When using 1080/50i sp (25 mbs) my 8gb cards give me 39 mins.
Your 1080/60i sp should give you the same.
1080i sp is the only format which is 25mbs, all the rest are 35mbs, hence the lower recording times.

Paul.

Adam Reuter · August 11th, 2008, 03:14 AM

Indeed, what Paul said. The 720p modes are all high quality, designated by the HQ next to the name. The 1080/60i and 1080/24p SP modes are the lower data rate settings.

Collis Davis · August 11th, 2008, 06:50 AM

Dave, I strongly suggest you obtain a PDF copy of Phil Hodgett's The HD Survival Handbook.

http://www.proappstips.com/HDSurvivalHandbook/

It is the most impressive run-down of all the whys and wherefors of HD video, written for the rest of us in clean but easy to understand terms with excellent illustrations and references to specific gear.

It's only $15.95, and 212 pages, 54 Megs. Please be advised that I have no financial stake in providing this information. It's simply a matter of spreading knowledge where it can be the most helpful.

The following is from the Foreword:

"The HD Survival Handbook was written to answer the myriad of questions that arise when a video professional moves from working in the Standard Definition world up to the more complex world of High Definition.

There is a companion blog site for this handbook at http://blog.proappstips.com/archives...ry/hd-survival where updates and changes will be posted.

The Production section of the Handbook covers the reasons why you should be working in HD, how to interpret specifications, HD formats and a direct comparison of HD Cameras under US$10,000. The Post Production section has everything you need to know to deal with HD through a Final Cut Pro edit, including storage requirements and technologies, capture hardware, HD workflows, 24P pitfalls and workflows, and finishes with archiving file based media.

The Distribution section of the Handbook covers the issues of distributing HD when
the production is complete."

Noah Kadner · August 11th, 2008, 07:58 AM

Or in handy DVD form, I humbly offer our training disc. :)

http://www.callboxlive.com/store/son...book-p-39.html

-Noah

August 10th, 2008, 09:11 PM	#1
Dave Morrison Major Player Join Date: May 2002 Location: West Central Florida Posts: 762	Recording Times vs. Recording quality This might be a really dumb question, but why is it that my 8 gig cards always record only 28 minutes regardless of the recording quality setting? Why wouldn't the file sizes drop somewhat when I use the lowest quality setting on my EX1? __________________ EX1, Nikon D750 http://www.morrisonphotographics.com http://www.heritagefilm.com

August 11th, 2008, 02:23 AM	#2
Paul Kellett Trustee Join Date: Nov 2007 Location: Bristol UK Posts: 1,273	When using 1080/50i sp (25 mbs) my 8gb cards give me 39 mins. Your 1080/60i sp should give you the same. 1080i sp is the only format which is 25mbs, all the rest are 35mbs, hence the lower recording times. Paul. __________________ Round 2 GH5,FZ2000

August 11th, 2008, 06:50 AM	#4
Collis Davis Regular Crew Join Date: Dec 2003 Location: Metro Manila, Philippines Posts: 60	Recommended reading: The HD Survival Handbook Dave, I strongly suggest you obtain a PDF copy of Phil Hodgett's The HD Survival Handbook. http://www.proappstips.com/HDSurvivalHandbook/ It is the most impressive run-down of all the whys and wherefors of HD video, written for the rest of us in clean but easy to understand terms with excellent illustrations and references to specific gear. It's only $15.95, and 212 pages, 54 Megs. Please be advised that I have no financial stake in providing this information. It's simply a matter of spreading knowledge where it can be the most helpful. The following is from the Foreword: "The HD Survival Handbook was written to answer the myriad of questions that arise when a video professional moves from working in the Standard Definition world up to the more complex world of High Definition. There is a companion blog site for this handbook at http://blog.proappstips.com/archives...ry/hd-survival where updates and changes will be posted. The Production section of the Handbook covers the reasons why you should be working in HD, how to interpret specifications, HD formats and a direct comparison of HD Cameras under US$10,000. The Post Production section has everything you need to know to deal with HD through a Final Cut Pro edit, including storage requirements and technologies, capture hardware, HD workflows, 24P pitfalls and workflows, and finishes with archiving file based media. The Distribution section of the Handbook covers the issues of distributing HD when the production is complete." __________________ Collis H. Davis, Jr. Okara Video Philippines

August 11th, 2008, 03:14 AM	#3
Adam Reuter Major Player Join Date: Nov 2006 Location: Baltimore, Maryland Posts: 234	Indeed, what Paul said. The 720p modes are all high quality, designated by the HQ next to the name. The 1080/60i and 1080/24p SP modes are the lower data rate settings.

August 11th, 2008, 07:58 AM	#5
Noah Kadner Better than Halle Berry Join Date: Feb 2004 Location: Los Angeles, CA Posts: 435	Or in handy DVD form, I humbly offer our training disc. :) http://www.callboxlive.com/store/son...book-p-39.html -Noah