Great workaround OR bad idea for 525i pull down with 1080 23.98 UC footage?

[Christopher Tay]

I’ve also noticed the same behaviour that if you switch in the AJA Control Panel to 1080 29.97, select the 525i downconvert and then switch back to 1080 23.98, the downconvert selection will remain at 525i but is now greyed out but it will still spit out a downconverted SD 525i signal and the playback looks fine to me.

Not sure if this is a hidden feature.

-chrispy

[Gary Adcock]

[Aaron Goddard] “Onlining a film at 23.98 with K2 (D2.5, FCP 5.04, QT 7.1). Used the 1080 23.98psf 10-bit UC easy setup for capture. With this easy setup the 525i downconversion is not available (greyed out). Switched the setup to 1080 29.97 and voila! the 23.98 timeline plays, looks good on the HD Monitors, AND the 525i out works and looks fine on NTSC monitors.”

Aaron
this is correct – the 24p production workflow for everything except HDCAM 24psf assumes that the tape format is really 24p wrapped into a 60 FRAME (720p) or 6O FIELD (1080) SMPTE video stream. All you did was tell the video you needed your 23.98 content to play correctly in a 60 field world.

Sometimes it’s the simple things that work the best.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Chicago, IL
gary@studio37.com

[Aaron Goddard]

Beware of the 1-frame video delay. Here is an email response from AJA:

Setting the video playback to 1080i29.97 and the Kona secondary format to
525i29.97 is a valid way of downconverting.

One word of caution: there is a 1-frame delay for video only with
downconversion; therefore delay the audio on the FCP sequence by 1-frame.
Some editors are still okay with a 1-frame delay but I thought I should
mention it.

Best regards
Rudy

Rudy Van Kol
AJA Video Technical Support