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2 different aspect ratios in DVCPro HD 1080i
Hi all,
Just another “gotcha” with DVCPro HD I thought I would share since so may folks are using this codec for their workflow.
DVCPro HD 1080i/50 (25) is 1440×1080 native
DVCPro HD 1080i/60 (29.97) is 1280×1080 native
I just wanted to put this up here because folks on here, including myself, have been referring to all 1080i DVCPro HD as 1440 wide, but I just had some graphical problems with a 1080i/60 show we’re working on and come to find out, 1080i/60 is different.
Really don’t understand that one as it is a width change and not a height change like SD NTSC vs. PAL. Just another fun fact to share with DVCPro HD.
Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”
HD Editorial for “Assignment Earth”“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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8 Replies
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[walter biscardi] ” but I just had some graphical problems with a 1080i/60 show we’re working on and come to find out, 1080i/60 is different.”
Do you not design @ 1920×1080 regardless of pal or ntsc?
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[JeremyG] ”
Do you not design @ 1920×1080 regardless of pal or ntsc?”All master graphics are 1920×1080, then need to be adjusted accordingly.
Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”
HD Editorial for “Assignment Earth”“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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I see, so you render out according to whatever standard you need. I always render out at full raster and let FCP handle the conversion if I’m working DVCPRO HD native.
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[walter biscardi] “Really don’t understand that one as it is a width change and not a height change like SD NTSC vs. PAL. Just another fun fact to share with DVCPro HD.”
Dang foreigners!….. They just have to do everything different!
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Wayne Carey
Schazam Productions
http://www.schazamproductions.com -
[JeremyG] “I see, so you render out according to whatever standard you need. I always render out at full raster and let FCP handle the conversion if I’m working DVCPRO HD native.”
If you do that, you can end up with some funky looking graphics that are scaled down and somewhat distorted. I let Photoshop handle the conversions so the graphics are perfectly clean and everything is in the correct aspect ratio within FCP.
Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”
HD Editorial for “Assignment Earth”“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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Got ya. I’ve had no problems with it, but I usually finish up uncompressed so the graphics I create are in the correct aspect for the final sprint.
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yeah once again us NTSC’ers get the shaft on lower resolution.
as far as resizing, I learned the hard way not to trust the scaler
in fcp. I do it in photoshop or after effects and never have a problem.Geez apple, get with the program and implement a bi-cubic resizer already!!
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[walter biscardi] “DVCPro HD 1080i/50 (25) is 1440×1080 native
DVCPro HD 1080i/60 (29.97) is 1280×1080 native”
Makes sense if you do the math, 50i requires a lower data rate than 60i so they could increase the frame size of 50i and still stay with in the 100 megabit data rate.
Cheers
John Christie
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