想問一下render setting 入面"Device aspect ratio"同"Pixel aspect ratio"個分別

[newbie_vita]

如果我要系
35mm film is 2048 x 1556 pixel for 1.33 aspect ratio,
the visible area is 2048 x 841 pixel

咁 1.33 aspect ratio 系唔系應該打系pixel aspect ratio ??

[h2o]

1.33 device aspect ratio? 系 4:3 喎, 即系 tv ratio, 加上先天 CRT TV 既原因, 而導致 NTSC & PAL 有唔同既 pixel aspect ratio.
正常 film 系出 square pixel 架, 除非系 anamorphic 啦

如果系講緊 1.33 系 pixel aspect ratio, 咁我諗個 source 系 HDV 1080, 1440 x 1080 (唔系 HD 1080)

第三個可能系個 resolution 其實系 2048 x 1536......

[stantang]

pixel aspect ratio 1.33 is what we normally called anamorphic.

2048x1556 is just one of the many resolution when 35mm film scanned and transferred to DI. We normally called that 2K Full Aperture. It's a standard. You don't need to change the device or pixel aspect ratio. It's not exactly 1.33 device aspect ratio but this standard is mostly for transfer back to film so the device aspect isn't very important.

[h2o]

提起 anamorphic, output 2k anamorphic film 既 pixel aspect ratio 系 2 (即系高度拉長一個 double); 雖然同 HDV anamorphic 都系有相同既字, 不過大家 size 系唔同


之前另一個 post 都有提過下有關既野
http://www.cg-forum.com/main/viewtopic.php?t=10414

[newbie_vita]

唔該大大..等我睇下個post先