Delta Keyer vs Ultra Keyer ← DaVinci Resolve ← Socratica
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- čas přidán 5. 09. 2024
- DaVinci Resolve has multiple keyers to choose from. Two of the most popular are the Ultra Keyer and the Delta Keyer. In this video, we'll compare these two keying nodes in Fusion. We'll show how with just a few extra seconds of filming, you can save a lot of time in keying by using the delta keyer with a "clean plate" image.
#davinciresolve
#greenscreeneffects
#socratica
#chromakey
Just FYI, the noise in the background isn't due to reflected light; it's caused by digital compression and low color depth (8-bit). Broadcast quality color starts at 10-bit, and 12- or 16-bit cameras, such as the RED Komodo, are even better for keying. Cameras such as the Lumix S5 or Sony A7S3 are good choices for higher quality at a reasonable price.
Excellent comment. (Thanks!) I'll pin this for others to read!
We use a BMPCC6K camera, but haven't switched over to BRAW yet. Soon!
it is also due to how light works, it is nearly impossible to light a green screen evenly, , bnut yes in this instance it has the round shape it is propably the camera :) - When you change to Braw you will propably rejoice a little, banding is not really an issue compared to proress.
@@socraticafx Hola
SOcratia FX ya lo he puesto mi ultimo video como ejemplo para que veas que tego un problema con el croma ¿me puedes ayudar,, de paso me he subcrito a ti, haber que me puede pasar,, en mi vacinci 18,7 no hay Key 3d y puse composicion delta en el apartado de fusio, estoy negro,, con premiere era mas facil gracias ¿por que me sale esos colores tan feos? detras de mi ?
The way this guy makes this video so to the point and analyzing all details is a 10/10 no youtuber i have ever seen do itt
Your thoroughness is inspiring.
Thank you for your attention to detail while not overlooking the fundamental principles.
You’re a great educator!
Cool video. Also, if you don't have a clean plate, you can use the clean plate node in Fusion to create a clean plate feom the green screen footage.
You have a gift my friend, when someone knows how to deliver what's on their brain so other can learn from it, it stick on your brain for ever, I had a good teacher like that, when went for my GED, no one had a problem understanding, in fact, the English a know, its on part thanks to him, I'm from Puerto Rico. Thanks!
Do note, there are some keyers, that in addition to detecting green, they also check that the level of the BG red channel matches the BG blue channel. If the red and blue are not the same level, then don't key out. This allows working with green on the keep part of the image. Example, a soldier wearing green fatigues in front of a green screen.
ALso noteworthy is there is a cleanplate node which can artificially create a cleanplate by keying out the subject and filling in the hole with the surrounding green.
Just want to say what others have: your teaching style is superb. The perfect level of explanation, background, pace. I’ll be watching everything else! Thanks from a new DaVinci user.
Wow, that's the most straightforward explanation I watch on CZcams! Sub to you, sir.
WOW, amazing! Thank you so so much for such a thorough explanation!
Good video. I am familiar with the Delta Keyer and was curious about the Ultra Keyer. I will stay with the Delta Keyer. One thing I do when I get to the threshold stage of my key is to slide the monitor gamma controls to make my viewer display quite a severe image of the background or foreground so I only use just enough threshold and don’t start losing detail like fine hair or transparency. I often put a noise reduction node before the Keyer and refrain at the end, if necessary.
I do a lot of greenscreen and don’t always shoot it. Sometimes footage arrives and I haven’t got a clean plate AND often the camera op will change lighting or exposure to get a “better” clean plate.
At those times I find it useful to use the Ultra Keyes and adjust the threshold.
Clean plates are troublesome in long form shows with different setups. I’ve had camera ops just shoot one (“here’s a shot of my screen”) as if we just wanted a sample.
If you’re shooting just the one shot then, sure, the clean plate is easy.
Great explanation of how to create and use a clean plate. You just changed my workflow. 🙂
Nice! I will start using a clean plate from now on, definitely helps cut down on masking and retaining more details
I loved the way you explain things. It's very clear and easy to understand.
up to 9 minutes of the video and you won a new subscriber!!! well done!! nice job!!
Great video, very easy to follow, thank you !
Vastly helpful. Thanks
Extremely well presented, thank you. Subscribed.
That was very helpful, thank you very very very much!!!
Very clear explanation. Thanks. Subscribed.
Thank you Very very Much!
Lovely done! I am looking forward to see more!!!
Very very nice explanation!
Thank you 😊
Excellent video! Thanks for making it. ❤❤❤
Fantastic video. Very well explained.
So well explained. One of the best. :))
Much cleaner! give thanks
Very interesting and helpful! Thanks
Very helpful. Thank you kindly.
Great, thanks
If you’ve ever heard someone talk about “garbage masks”, cropping out the corners on the Ultra Keyer footage would be a good example. It can be used with any key, just mask out the areas you don’t want/need to key, so that you don’t have to work so hard with the key node. (The mask would be a node before the key). Easy for a talking head, much more difficult for moving actor.
🎯 Key Takeaways for quick navigation:
00:00 🎥 DaVinci Resolve videos include host intros and summaries. The raw footage needs keying and color correction.
00:27 🎬 Introduction to the Edit tab and a preview of the green screen footage.
00:55 🔧 The Fusion tab houses the tools to key the footage, highlighting the Ultra Keyer and the Delta Keyer.
01:24 🎨 When using the Ultra Keyer, select a background color near the subject for a cleaner key.
02:16 🔍 Viewing in Alpha channel mode helps identify transparency levels.
02:43 📽️ The Delta Keyer assumes the presence of a clean plate - a background shot without the subject.
03:38 🎛️ Delta Keyer has multiple inputs including a clean plate input, unlike Ultra Keyer.
05:00 ✅ Using a clean plate in Delta Keyer results in a more uniform key, especially in corners.
05:54 🧪 Demonstrating challenges faced with non-uniform green screen backgrounds.
07:09 💡 Using scopes, one can visualize the variance in color across the green screen.
08:33 🖌️ The ideal green screen is perfectly uniform across the entire screen, but in reality, this is rarely achieved.
08:45 🌈 The Ultra Keyer selects a single green color to turn transparent.
09:27 🚫 Issues arise on the left and right sides where the green is inconsistent.
09:53 🧩 The Delta Keyer uses a clean plate to address color inconsistencies.
10:22 🧮 Delta Keyer, named after the Greek letter Delta, subtracts pixel colors from the clean plate.
11:14 ⚙️ The threshold control helps make almost-opaque pixels completely opaque and almost-transparent ones completely transparent.
12:08 💡 Light bounce from subjects can introduce color inconsistencies.
14:17 🏷️ Renaming nodes can help organize and differentiate between keying methods.
14:47 🟢 "Spill" is the reflection of green light onto the subject from the green screen.
15:12 🧼 Spill suppression tools help reduce the green reflection effects.
16:37 📝 To use the Delta Keyer effectively, film a clean plate without subjects.
17:02 🔍 With Ultra Keyer, more adjustments might be needed for a perfect key.
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Thank you very much. Lots of information here thad I didn't knew.
Great Video!
Very nice. Thank you
полезно, но затянуто. молодец
well explained // Best //
interesting . I am learning new things
Thanks, very informative. How do these two compare to the 3D keyer in the Edit screen? This is the one I currently use (allows me to stay in the Edit screen).
So then what is the advantage of using the ultra keyer. Great video
When you don't have a clean plate
@@stanmanjam but couldnt deltakeyer do what ultrakeyer does even without the cleanplate? There must be something special about ultrakeyer
@@seanvideoeditingIt looks that way, but ultrakeyer doesn't carry the overhead of processing a clean plate so it is (I'm assuming) more efficient in instances where you don't have one.
bro… why does that woman look like she’s in a HOSTAGE VIDEO… 😂
How about 3d keyer and luma keyer?
so delta keyer only works for static shots if you wanna use the cleanplate? kinda impossible (if your camera is not on some robot arm) to get the same movement twice.
Pretty much. I'd only use the delta keyer when the camera is locked down. I think Big studios do use robot arms to recreate camera motions with precision, but I doubt they are keying with a delta layer.
Not necessarily, you can use delta keyer for all types of shots as well. Make sure to use the clean plate node if you don't have a clean plate.
This is just two month old, but isn't it obsolete with magic mask?
It might be that “Magic Mask” might be more processor intensive. Someone would have to compare the two methods, just like this video did with Delta and Ultra. ….Rowby.
what do you click to get the box pop up to select Delta keyer?
The keyboard shortcut is SHIFT + SPACE. Hope this helps!
Why not use the 3d keyer?
boring nonsense