Weird 720p 10 bit scaling problem…

[Mactrix]

I can reproduce it but another way.

I downloaded your example file.
I put it into a 10 bit uncompressed SD sequence.
I scaled the clip to 102%.
I output to a JVC SD monitor via an AJA Io.

I can solve the problem like this:

Go to -> and chose

or

Set to

[Jeremy Garchow]

Hmm, guess it’s a 10 bit thing. Thanks for checking. I have yet to speak with AJA about it, but now maybe I think it’s an Apple codec issue. I don’t know and when I speak to them I’ll post back.

Jeremy

[Mactrix]

Sorry, my posting was messed up.

You can solve the issue like this:

Go to ‘Sequence’ – ‘Settings’ – ‘Video processing’

Use ‘Render in 8-Bit YUV’ or switch ‘Motion Filter Quality’ to ‘Fastest (linear)’.

[Jeremy Garchow]

Yeah, the html-ish code got stripped in the post, but came through in the email notification.

Thanks for reposting for the public to see. I am still waiting to hear from AJA.

Jeremy

[Andrew Schuurmann]

Hi guys,
I’ve had this same problem with Apple’s 10 bit codec in SD (using the AJA Kona NTSC 10 bit Uncompressed easy setup on my Quad G5 with a LHe — all drivers, versions, etc. up to date). It showed up on the whites on a bunch of the picture-in-picture style effects I had in the edit (scaled to less than 100%). I ran out of time (deadline), so I ended up moving everything to an 8 bit timeline and the problem went away. I vaguely recall hearing that Apple’s 10 bit codec isn’t reliable (maybe from Gary Adcock?), but I didn’t think about it until now.
Not that any of this info helps solve the problem, but I wanted to let you know it’s not just your system.
Let me know if I can provide any more info.

Andrew

[Jeremy Garchow]

I spoke with AJA and it’s a bug but they aren’t sure if it’s the Kona or Apple’s codec. They are working on it.

I have the same media captured at 8 bit and there’s no problem (just like you said Andrew).

I’ll disseminate more info as I get it.

Thanks for your help.

Jeremy