7

You'd probably want to light it anyway, as it will make it easier to pull a key if it's properly lit. The farther you can keep it away from the objects or talent you'll be keying, the better. But light is essential to accurately capturing color, so if you can light it, you should. You want it to be evenly lit so that you don't have to choose too wide of a ...


5

While chroma-keying is a good technique for dealing with solids, it doesn't work so well when dealing with transparent or semi-transparent objects. Because the difference can be very subtle, you want to copy the difference instead or blend off luminance. In Premiere, you can use the Set Matte effect to set a track as a luminance matte. In the case of the ...


4

First off, you would normally use After Effects for special effects such as Chroma Keying. That being said, Premiere Pro is capable of chroma keying quite decently. Here's an example using free smoke effects by JohnnyFXEffects. Set up your scene as you usually would, and then go to the 'Effects' tab. (1) From the 'Keying' folder, select the 'Chroma Key' ...


4

Let's first review the basics of green screen: 1) screen about 5 or more feet behind subject so it is out of focus from subject. 2) flat screen, no wrinkles. 3) flat lighting, no shadows, no hot spots. 4) subject can not wear green or wear shiny things or see through things. Review Vegas Chroma Key: Once you engage the chroma key effect, use the eye ...


4

There are a zillion greenscreen tutorials on YouTube. The basics are simple. 1.Pure green paint or fabric. 2.Even lighting on the green, good lighting technique on the subject. Avoid spills and shadows. 3.Use the highest quality camera, lenses and compression you have available -- but don't freak out unless you're using a lot of translucent objects like ...


4

You don't say what you're using to edit these videos, but there may be a better chromakey plugin for your platform than what comes natively. Also, again depending on your platform, most editors will allow you to crop the key area (garbage matte) so that the green screen doesn't have to cover the entire raster, just enough to back the product you're ...


4

Looking at your first example, I woul guess green screen, and not a particularly good one. It looks like they really need to increase the spill suppression, judging by the green spill evident on the feet of the bin. An alternative approach is to shoot in a studio with an infinite white cyc, for example something like this one (randomly selected from a ...


3

The key to pulling a good key is a clean separation between key and subject. All things being equal, higher resolution will give a sharper edge between key and subject, which is good. But that's just one consideration. Chroma subsampling is another. Chroma recorded at full bandwidth (at least 10-bits and 4:4:4) will give a cleaner key than chroma ...


3

Most likely, they are simply using an output of the notes with transparency. If you output the digital version of the notes with a transparent background you could just layer it over the video once properly aligned and it would work fine. Alternately, a quicker process if they do not support alpha is to just apply a blend between the layers. Since the ...


3

Assuming the lighting is solid, you should be in good shape. I haven't used the keying features of iMovie, but I can give you a few tips for After Effects. I'll defer to any power users of AE's keying functionality to chime in with more specific advice. First, you'll probably want to start with the Keylight plugin (from The Foundry). It should come bundled ...


3

The best thing you can do is get as much right on set as possible. Cover cast, crew, and equipment with black fabric, hide them behind black curtains, Get your talent as far away from the green screen as far as you can while still maintaining its utility; choose your angles carefully, and keep the shots short, because whatever you do, you're going to have ...


2

You could use a revolving cake stand.


2

The simplest way would be to set the blending mode of the smoke clip to "screen". You'll find this setting in the "Effect Controls" panel under Opacity. Screen basically ignores black. A better description is found on Adobe's site: http://helpx.adobe.com/en/photoshop/using/blending-modes.html


2

There isn't a right or wrong answer here I don't think. Both approaches have advantages. Keying at 1080p will give you clearer detail when trying to find edges, but also will have more noise that could throw off a key. Additionally, the downscale after the key will apply a slight blur to the image further disguising the edges to make the keying less ...


2

This might be an issue with the Vegas chroma key program removing green from all objects and making it transparent rather than finding only solid green and modifying that. Someone may know how to fix this in Vegas, but if all else fails you can run your keyed footage through a program like Davinci Resolve Lite (free) and correct the colors.


2

This is quite simple. Use any keyer of your choice that can give you a good mask for the layer, then place an "Alpha Adjust" layer below it in the Effects control and click the "Invert Alpha" checkbox. This will invert the alpha channel produced by the keyer and reverse the effect the way you are looking for.


2

Even a typical lamp with a "daylight"-colored bulb in it can act as a lighting source for your product. I'm sure your boss could spring for one light bulb! If you shoot again with the new lighting, or even without the new lighting, play around with the angle of your product / camera / stool to minimize the reflections.


2

I have a couple of suggestions that could be of help: 1) Use a polarizer to reduce reflections. You say your boss won't spring for anything else, but you can pick one up fairly cheaply (like under $20 on amazon). If that's really not an option, you can try using some polarized sunglasses in front of the lens, at least to see if it eliminates the reflections....


2

The problem that you're going to have with this is that the colour of the screen is too similar to colours in the foreground. If you look at the levels on the highlighted part of the drummer's face they're very similar to the levels on the edges of the screen, and a similar colour, same for the drum skins and the pattern on his shirt. I had a go in AE with ...


2

This isn't chroma keying. If your subject isn't in front of a green screen (or blue) then you're only other alternative is to mask it, rotoscope to be precise. After Effects does have a tool called a rotobrush that let's you brush around the edges of your subject but it's not the most precise or clean mask.It will however make for a very quick rotoscope. If ...


2

You are correct that the chroma key is typically performed in the vision mixer/video switcher. In order to assist camera operators in framing shots around chroma keys (and other downstream effects like DVE moves, lower thirds, and over the shoulder graphics), professional studio cameras have one or more program returns that allow the vision mixer/technical ...


1

I hope the person receiving your 'green screen' lower third doesn't ever find you in a dark alley. If it was me I'd be looking to bring the hurt. Really, this is not the way to do it. Firstly there are more space efficient codecs with alpha channels than the default Apple Animation, try proRes 4444 or the newer Cineform If you really can't afford the ...


1

With these kinds of things, I suggest not even using a green screen in the first place, especially one that is in an app and casts a green glow on the actors hands or body and picks up on reflections. Its much easier to have, instead, either a green piece of paper (which honestly will not really work in daylight in terms of the key but will at least give you ...


1

Trackers never hurt and there's almost no reason not to use them, but there's no substitute for pre-production and field testing. The only failure is failure to plan. Ideally your markers would be high contrast, however you can place darker green markers on a green screen which can be entirely keyed out if the artist doesn't need them, but will still be ...


1

The problem is that my alpha Mask has a feather. Which results in greeen peaking through the Mask. So the only solutions are export an alpha mask with no feather or export the original image with a black or desaturated background.


1

Part of it may be the fact you are using JPEG sequences. JPEG isn't a pixel accurate format and you are going to have some differences in block quantization that could potentially result in mismatches. I don't think that is the only issue since it is a bit too regular for it to be the only issue, but I'd try to use an intermediate format that is a bit more ...


1

I would guess that it is trying to correct for green highlights in the chromakeyed video and overdoing it. It's relatively common for green screen footage to have greenish reflections due to light bouncing off the green wall back on to subjects. The chroma-key effect may be attempting to automatically correct this and catching objects that have no such ...


1

What you're looking for is a difference matte. (Not to be confused with a Color Difference Key which is similar to regular chroma key.) It can certainly be done, though you should know that difference mattes are fairly temperamental. The way it works is by finding the difference between an image and each frame of video, and removing anything that's the same,...


1

It depends, you can typically adjust a tolerance for the level of removal. If the colors of green are closer than the next nearest color, you should be fine, if not, then you would have to do two keys, though I would expect you should be able to stack two layers to get the necessary transparency. (Basically keying over a keyed image, since the result of a ...


1

Everything that Filzilla said is great and on point. BUT the standard chromakey plugin that comes with Vegas is lacking. There really is no way to get around it. I have been doing greenscreen videos for yourmusicmuse.com for 3 years and I have found the NewBlue ChromaKey Pro plugin is perfect. It has the following features: Garbage mask to mask out bad ...


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