FORUMS: list search recent posts

1080 vs 720 on ex1r

COW Forums : Sony XDCAM - EX & Related

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
jim stamos
1080 vs 720 on ex1r
on Apr 9, 2010 at 1:39:03 am

is there a noticeable difference in quality between the two? i seel alot shoot in 720p instead. are they getting alot more time on the sxs or is there not much difference visually between the two.
whats the pros/cons of shooting 720p over 1080, some good input on this welcome


Return to posts index

Noah Kadner
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 2:11:12 am

Depends on the output. 1080p is obviously higher resolution frame size but it comes from the same chip so not night and day different. 720p's advantage is more frame rates like slow mo and high speed. But other than that I typically recommend going full 1080p- more common, universal HD format. (though of course some folks would argue that point).

Noah

Check out my book: RED: The Ultimate Guide to Using the Revolutionary Camera!
Unlock the secrets of 24p, HD and Final Cut Studio with Call Box Training. Featuring the Sony EX1 Guidebook, Panasonic HVX200, Canon EOS 5D Mark II and Canon 7D.
Watch Formosa- My indie movie shot with the SDX900 and finished with Final Cut Studio.


Return to posts index

Craig Seeman
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 2:37:15 am

I tend to shoot 1080p30 but I wouldn't doubt Noah users 1080p24.

If you're shooting sports you might choose 720p60 since some of us prefer 60 progressive frames rather than 60 interlace fields of 1080i.

If you shoot 720p24 you have the ability to overcrank to 720p24/60 for 2.5x slow down.

All XDCAM frame sizes standard frame rates are at the same data rate so there's no difference in amount of card storage used . . . unlike P2.

XDCAM EX is 35mbps

Shooting overcrank does record at a higher data rate though. The target is 35mbps playback so 720p24/60 would be recording at 87.5mbps I believe so that does use up the card faster. In that case 10 minutes recording is 25 minutes playback slow mo so 25 minutes of card space is used.

16GB card is about 55-57 minutes of record time give or take.



Return to posts index


Will Salley
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 3:18:22 am

[jim stamos] "is there a noticeable difference in quality between the two?"

You will notice a difference on a full 1920x1080 Pro monitor or a very good consumer TV and if you do any compositing, it will benefit your image.

The bigger difference, in my opinion, is between Panasonic 1080 shot with a camera that has only 1280x1080 pixels of information and Sony cams with 1920x1080 chips natively. Sony 1080P into a KiPro at 100Mb/s (or Nanoflash) produces an image that holds up to anything, especially when used with a good DOF adapter/lens combo.

I'm sure some will disagree though (Pany and Red owners).

Mac Pro 2x2.8 Quadcore - 10.6.2 - QT 7.6.3 - 22 GB RAM - nvidia8800GT - SATA internal & external storage - Blackmagic Multibridge Pro - Open GL 1.5.10 - Wacom Intous2 tablet - AJA io
SONY XDCAM EX3 - Letus Elite


Return to posts index

Noah Kadner
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 3:55:08 am

No disagreement from me- but was that a part of the original question?

Noah

Check out my book: RED: The Ultimate Guide to Using the Revolutionary Camera!
Unlock the secrets of 24p, HD and Final Cut Studio with Call Box Training. Featuring the Sony EX1 Guidebook, Panasonic HVX200, Canon EOS 5D Mark II and Canon 7D.
Watch Formosa- My indie movie shot with the SDX900 and finished with Final Cut Studio.


Return to posts index

Will Salley
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 4:13:43 am

[Noah Kadner] "but was that a part of the original question?"

Not really..just random banter after two 12 hour+ shoot days!



Mac Pro 2x2.8 Quadcore - 10.6.2 - QT 7.6.3 - 22 GB RAM - nvidia8800GT - SATA internal & external storage - Blackmagic Multibridge Pro - Open GL 1.5.10 - Wacom Intous2 tablet - AJA io
SONY XDCAM EX3 - Letus Elite


Return to posts index


Noah Kadner
Re: 1080 vs 720 on ex1r
on Apr 9, 2010 at 4:35:24 am

Heard dat...

Noah

Check out my book: RED: The Ultimate Guide to Using the Revolutionary Camera!
Unlock the secrets of 24p, HD and Final Cut Studio with Call Box Training. Featuring the Sony EX1 Guidebook, Panasonic HVX200, Canon EOS 5D Mark II and Canon 7D.
Watch Formosa- My indie movie shot with the SDX900 and finished with Final Cut Studio.


Return to posts index

David Burch
Re: 1080 vs 720 on ex1r
on Apr 16, 2010 at 12:09:08 am

For me it depends on what I'm doing with it. 720p24 has a couple advantages, namely better light gain, less compression per frame and the ability to overcrank to 60fps. I typically use 720p24 if I am planning on downscaling anyway, which is a good portion of what I do. However, if I am planning a Blu Ray or other HD form of release, I'll use 1080p24 or 1080i60, depending on the shoot. I may also choose 720p60 for Blu Ray if motion clarity is critical.

Since the bit rate is relatively constant regardless of frame rate or image size, what is changing is how compressed each frame is. Shooting in 1080i, the codec has to encode about 62,208,000 pixels per second. In 1080p24, that number is 49,766,400. In 720p60, the number of pixels per second is actually higher than 1080p, at 55,296,000. 720p24 is only 22,118,400. In other words, 1080i is the most costly, at nearly 3 times as much data as 720p24 that has to be encoded with the same bit rate. Next is 720p60, then 1080p24, and finally 720p24, at less than half the amount of data as 1080p. All things being equal, this means that if you are downscaling anyway you should end up with better results by shooting 720p24 (less compression artifacts, resulting in a cleaner downscale).


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]