LEngth of footage for blu-ray disc at DVinfo.net

Go Back   DV Info Net > Cross-Platform Post Production Solutions > Distribution Center > Blu-Ray Authoring


Reply
 
Thread Tools Search this Thread
Old November 18th, 2010, 01:31 AM   #1
Regular Crew
 
Join Date: Jul 2009
Location: Modesto, CA
Posts: 26
LEngth of footage for blu-ray disc

For a single sided blu-ray disc, how much time can it hold? 1920.x1080 footage from NX5U
Gabroo Singh is offline   Reply With Quote
Old November 18th, 2010, 02:17 AM   #2
Major Player
 
Join Date: Nov 2009
Location: Melrose Park, Illinois, USA
Posts: 936
It depends on whether your shooting mode is FX (24 Mbps max) or FH (17 Mbps). FX really averages about 21 Mbps (or 15 Mbps for FH). Figure on about 2.5 hours of FX-shot footage or just under 3.5 hours of FH-shot footage (both times are estimates).
Randall Leong is offline   Reply With Quote
Old November 18th, 2010, 08:40 AM   #3
Regular Crew
 
Join Date: Jul 2009
Location: Modesto, CA
Posts: 26
Thanks for the help.

To get those times, are you dividing the storage space (total gb on blu-ray disc) by the mbps?
Gabroo Singh is offline   Reply With Quote
Old November 18th, 2010, 12:20 PM   #4
Major Player
 
Join Date: Nov 2009
Location: Melrose Park, Illinois, USA
Posts: 936
Quote:
Originally Posted by Gabroo Singh View Post
Thanks for the help.

To get those times, are you dividing the storage space (total gb on blu-ray disc) by the mbps?
I added audio and other miscellaneous bitrates to the average video bitrate of the file. The 21 Mbps and 15 Mbps figures apply to just the video bitrate. Then divide the average total bitrate into 25.2GB (or 23.4GiB).
Randall Leong is offline   Reply With Quote
Old November 18th, 2010, 01:02 PM   #5
Inner Circle
 
Join Date: Nov 2006
Location: Tallahassee, FL
Posts: 4,100
I don't understand what shooting format has to do with bluray authoring.
__________________
DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.
Perrone Ford is offline   Reply With Quote
Old November 18th, 2010, 09:06 PM   #6
Regular Crew
 
Join Date: Jul 2009
Location: Modesto, CA
Posts: 26
Quote:
Originally Posted by Randall Leong View Post
I added audio and other miscellaneous bitrates to the average video bitrate of the file. The 21 Mbps and 15 Mbps figures apply to just the video bitrate. Then divide the average total bitrate into 25.2GB (or 23.4GiB).
Thanks Randall, you've been a major help.

You wouldn't happen to know how long you can squeeze out if you are using 720p/60 from the NX5U, do you?
Gabroo Singh is offline   Reply With Quote
Old November 25th, 2010, 01:04 PM   #7
Regular Crew
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 145
Hi, Gabroo:

You may have this figured out by now, but the resolution and framerate (e.g., 720p60, 1080p24, etc.) don't really figure in how much video you can fit on the disc. It all comes down to the data rate. On your memory card (or FMU, if you have that on your NX5), 720p60 in FX mode will take up the same amount of space for any given period of time as 1080p24 in FX mode will; "FX" is Sony shorthand for 24Mbit/s peak.

Also, as Perrone rightly pointed out, shooting at a given data rate really has nothing to do with the data rate on the disc. Not necessarily, anyway. Frequently, you'll want to (or have to) adjust the data rate of your project to make it fit on the disc or else to minimize the effects of recompression.

Most of my Blu-ray programs (home videos) are an hour or less in length, meaning that I can take the 720p60 FX-mode sources from my NX5 and recompress my project at a much higher rate of 35Mbit/s and it will still fit easily on a one-sided Blu-ray. This is nice, because in general, recompression (implicit in most NLEs) is a damaging process, and boosting the data rate to the maximum that will fit on the target media often minimizes the appearance of new compression artifacts.

Enjoy the NX5! Great cam, IMO.

Best,
Aaron
__________________
Software Engineer, Video Hobbyist -- Sony FDR-AX100, HDR-CX12, Miller DS10/Solo, Premiere CS5.5, DYMO DiscPainter, 2010 Mac Pro 3.33GHz 6c
Aaron Holmes is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Cross-Platform Post Production Solutions > Distribution Center > Blu-Ray Authoring

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 04:35 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network