Quantcast Acutal size with "record cropped video" ? - digitalFAQ Forum
  #1  
03-02-2005, 02:54 AM
jlietz jlietz is offline
Premium Member
 
Join Date: Nov 2004
Posts: 10
Thanked 0 Times in 0 Posts
When choosing the MPEG-2 DVD format (MMC 8.5) and checking "Record Cropped Video", do you know what the actual size of the video is. I know the frame is still 720x480 (for full D1, anyway), but how much is being cropped? I didn't see this anywhere in the manual or over at videohelp.com.

And as a follow up, would you say that this is a substantial benefit in regard to saving bitrate? In my head it seems that way because there is no change in pixel information from one frame to the next, therefore more bits can be allocated to the actual picture rather than overscan. Am I reasoning this correctly?
Thanks.
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
 
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
03-02-2005, 03:23 AM
admin's Avatar
admin admin is offline
Site Staff | Web Development
 
Join Date: Jul 2003
Posts: 4,367
Thanked 581 Times in 435 Posts
Be sure the "cropped" is enabled in both places, in the MPEG settings, as well as the master MMC display settings. Not doing both will encode a funny-size res. Enabling both keeps a master 720x480 with the inner 675x450 (or something close) holding the actual image, and the outside 45x30 or so is black.

Yes, removing noise and unneeded image uses the bitrate on the actual image that is left. The black area takes up minimal resources. It results in a better quality MPEG, yes.

It's a real shame standalone DVD recorders and other capture cards don't have the overscan-obliterating feature.

- Did this site help you? Then upgrade to Premium Member and show your support!
- Also: Like Us on Facebook for special DVD/Blu-ray news and deals!
Reply With Quote
  #3  
03-02-2005, 03:39 AM
jlietz jlietz is offline
Premium Member
 
Join Date: Nov 2004
Posts: 10
Thanked 0 Times in 0 Posts
Wow, that cuts off quite a bit more than I had imagined. Thanks.
Reply With Quote
  #4  
03-03-2005, 11:41 PM
admin's Avatar
admin admin is offline
Site Staff | Web Development
 
Join Date: Jul 2003
Posts: 4,367
Thanked 581 Times in 435 Posts
It removes overscan...

... well, most of it anyway, enough to do some good, but not so much that it bleeds into the visible image.

Valuable feature.

- Did this site help you? Then upgrade to Premium Member and show your support!
- Also: Like Us on Facebook for special DVD/Blu-ray news and deals!
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Dangers of "shiny silver" discs? admin Blank Media 0 10-01-2009 03:55 AM
Blu-ray to allow "managed copies", new hardware required admin Videography: Cameras, TVs and Players 0 06-19-2009 11:23 AM
Third-Party/Generic/"Compatible" Camera Accessories admin Photo Cameras: Buying & Shooting 0 03-17-2009 03:04 AM
Sound Forge restoration of overblown sounds jeremym Restore, Filter, Improve Quality 3 02-14-2006 03:02 AM
Never seeing "Video Calibration" dmsinger Capture, Record, Transfer 2 03-04-2005 09:53 PM

Thread Tools



 
All times are GMT -5. The time now is 02:56 AM