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864x468

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864x468
by johnsabbath d'urzo (johnsabbath) on May 7, 2008 at 2:52:43 pm

i had to create a DVD for a client and they just wanted to put in the DVD to the player and not ajust any settings. so i created this DVD in AE just of stills in 864x468 then made a pre comp as 720 x 486 and squished the video and render. brought it into compressor and DVDSP and made a 4x3 DVD. when it is displayed on a plasma it would show it as 16x9 aspect ratio. no i want to back up on FCSP how do I do this and what would my settings be going into a beta sp deck?????/

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Re: 864x468
by Dave LaRonde on May 7, 2008 at 3:19:26 pm

[johnsabbath d'urzo] "...when it is displayed on a plasma it would show it as 16x9 aspect ratio."

You need to readjust the plasma set to show 4x3 and not 16x9.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA

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Re: 864x468
by johnsabbath d'urzo on May 7, 2008 at 3:29:11 pm

sorry that i was not clear, i want it as 16x9 on the plasma. i design the dvd as a squshed 16x9 on a 4x3 dvd to trick the aspect ratio and when it would be played back on a plasma that's 16x9 this part of it is good. know how would i make a beta sp back up of this if the comp is 864x468? what settings would i use?



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Re: 864x468
by Darby Edelen on May 7, 2008 at 3:39:30 pm

MPEG-2 is a unique codec and DVD is a unique form of media... put them together and you get a unique sort of mess. You can import a 4:3 MPEG-2 and tell DVDSP to stretch it to 16:9 in the track settings, but that's not the 'proper' way to do it. MPEG-2 has a bunch of header information in the video stream, one of which is the aspect ratio. If your footage is 16:9 then you should encode it as a 16:9 MPEG-2. In QuickTime player this 16:9 MPEG-2 will have an odd frame size (720x404) but that is normal and correct.

Technically this won't change the way the video is displayed on most set top boxes, but it definitely can change the way it is displayed on computers/software DVD players and perhaps even some set top boxes.

Darby Edelen
Lead Designer
Left Coast Digital
Santa Cruz, CA

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Re: 864x468
by Dave LaRonde on May 7, 2008 at 3:52:22 pm

[Darby Edelen] "In QuickTime player this 16:9 MPEG-2 will have an odd frame size (720x404) but that is normal and correct."

...and to confuse matters even more, the actual horizontal and vertical resolution of the 16x9 MPEG2 will remain 720x480, just like a 4x3 MPEG2 file.

When Quicktime has to deal with certain (but not all) non-square pixel aspect ratios, it likes to play with numbers.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA

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