-
Red One HD green screen problems
Hello everyone,
Although I am a new member, Creative Cow has been a valuable resource I have referred to for a while now. I am relatively novice as an editor (mostly produce and direct) and am having trouble with some Red One footage I shot on a green screen.
After chroma keying all of the green screen out and rendering the footage, a mysterious vertical line appears on the left hand side of my subject. This line is completely artificial, and appears to travel behind the actual subject in the shot. I don’t have a clue as to what it is, or why it is appearing after I render the clip.
I am editing the Red footage with Apple Pro Res 422 (HQ) codec.
I shot the footage @ 29.97 fps.Any help and insight as to why this is happening would be wonderful. I can provide any spec needed to help solve this, but since I have no idea where to start, I don’t know all the details required to get to the bottom of this.
Thanks,
Brandon
-
10 Replies
-
Can you post some footage or a still?
-
Good suggestion for sure.
How did you ingest the red files? Through log and transfer? You keyed them in Final Cut?
Jerry
Apple Certified Trainer, Producer, Writer, Director Editor, Gun for Hire and other things.
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO2 with MAX Cinema Displays
-
Hello,
Thanks for the replies. I ingested the files through the Log and Transfer using ProRes 422 (HQ). I accepted the prompt the change FCP settings to match the clip settings as well. I did use FCP to key out the green screen.
Nothing in the process indicated that there was anything wrong until I rendered the footage. The vertical line is completely artificial, but it looks like it may have something to do with interlacing. I retraced several steps, as well as keying out the green screen all over again and I still end up with this strange vertical line.
This video is going on the web, and to used as a guide through a web interface. That is the reason for the white background.
Any and all insight is greatly appreciated.
Thank you all so much,
Brandon
-
Tried keying it in Motion? Much better keyer than FCP’s. FCP also has a couple of keyers. Just using the Chromac Keyer there? With the visual display?
Select a clip and post it’s properties too… size et all.
Jerry
Apple Certified Trainer, Producer, Writer, Director Editor, Gun for Hire and other things.
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO2 with MAX Cinema Displays
-
Hi Jerry,
I haven’t tried using Motion for this. I am not very familiar with it, but it sounds like I should remedy that. I was only using the Chroma Key tool specifically. I rendered the footage to see how it looked and this is what it gave me.
I should also mention that the unrendered clip had large chunks of green screen appearing randomly within the garbage matte space when i moved the play head along the time line. The green screen “chunks” would appear and disappear, showing up in different places each time. Upon rendering, they never appeared again but instead this vertical line shows up. It was frustrating to say the least.
Here is a pic of the item properties of the clip being used in my post above. Not being very familiar with Red Footage, I have not tampered with any settings at all other than accepting the prompt to change the FCP settings to match the clip.
Thanks again,
Brandon
-
Oh wow. I know I uploaded the right photo. I don’t know how I duplicated the same upload.
Here is the item properties…hopefully.
-
I’m having the exact same problem. Everything looks fine and then once I render it a bunch of vertical lines appear.
The weird thing is I green screened another section of my footage earlier in my short and it’s completely fine, so i can’t see how it’s a problem with the footage or the settings or anything. very odd. p.s. i’m using footage shot on the 7d and converted to prores -
Your problem may be that you recorded h.264 files for a green screen… Not enough color information recorded?
Jerry
Apple Certified Trainer, Producer, Writer, Director Editor, Gun for Hire and other things. I ski.
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO2 with MAX Cinema Displays
-
I get the same thing with P2 footage. Might be from the spill suppressor settings? I can’t seem to find a happy spot where the spill goes away and the lines don’t appear after render.
-
The keyer in Motion is a ton better than the one in FCP. Try that…
Jerry
Apple Certified Trainer, Producer, Writer, Director Editor, Gun for Hire and other things. I ski.
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO2 with MAX Cinema Displays
Reply to this Discussion! Login or Sign Up