1080 60i footage from HDMI?

R

Richard J

Active member
Hey all, I have an HMC-150 and am really happy with it. The only qualms I have are that oftentimes when I'm color grading I feel the image is "falling apart" if I do anything but basic color correcting. I've even been happy with footage and then bummed when I tweaked it to match other cameras in multi cam environments. It's hard to say what happens to the image but it seems to lose some of its "organic" feel. I usually shoot in 720 60p, transcode footage to pro-res 422 and then edit in final cut pro for eventual export to SD-DVD. Sometimes for personal projects I shoot in 1080 24 p.
I have been in contact with the people at Atomos and am contemplating picking up the Ninja external recorder when it arrives. As I understand it, the HMC-150 HDMI out sends a 720 60p signal if your in any 720 frame rate and a 1080 60i signal if your in any 1080 frame rate. The 720 60p sounds perfect for most of my work but what are the implications of a 1080 60i signal? I never shoot interlaced b/c I always feel it kind of has a soap opera look. Can I take that 1080 60i footage and get it to 24 p? If so, what are the drawbacks of that workflow?
Lastly, in instances where my primary output is 720 60p, which I can get through an external recorder via HDMI, will the footage "hold together" more in post production for heavy grading and compositing. Thanks again. -Richard
 
What about 1080 30P oe 24p over 1080 60i. Might be a good option unless you need 60P (1080 30p or 24p over 60i will still maintain the 30p/24p).
 
Denwa said:
What about 1080 30P oe 24p over 1080 60i. Might be a good option unless you need 60P (1080 30p or 24p over 60i will still maintain the 30p/24p).
Click to expand...

Hmm, I'm interested but not exactly sure what you mean. I've heard people talking about recording 24 p in a 60i wrapper. I'm not completely clear on this idea. If the footage is recorded that way into an external recorder in Pro res 422 do I simply edit as if it's 1080 24p? What are the implications of working with a 1080 24p file in a 60i wrapper? Does is key well? Can I grade it as good as if the wrapper weren't there? I've searched the forums here on DVX-user and can't wrap my head completely around this. If there are no negative implications to working with the file in a wrapper then I guess it's fine.

When you say it will still maintain the 30p/24p do you mean it will still maintain the 24p "look" even though it's actually 60 interlaced?
Do you know if the footage can still be edited and graded and compressed in the same fashion with the same quality I would a simple 1080 24p signal without the wrapper?

Thank you for your response Denwa.
 
Here's a chart:
pro_pulldown.gif


You are recording 1 progressive frame over 2 interlaced frames.
 
You must log in or register to reply here.
Back
Top