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13

What sorts of fabric/material give good results? Both general tips and specific examples/links are helpful. Great Resources for tips on lighting and materials: http://provideocoalition.com/index.php/alindsay/story/greenscreen_primer_part_1/ http://rebelsguide.com/forum/viewtopic.php?t=2432 Underexposure (not lighting enough) is your biggest enemy, ...


11

Here's what I used for my setup. Fabric/Material The main thing is to find a material that is very green. Walmart sells (at least in Maine) a very green cotton fabric that works well ($9 for 3 yards). I've tried materials that are a lighter green, but without success. One thing you have to watch out for is large wrinkles, which will quickly ruin the ...


5

Me and my friend made one for a video project. What we did is took a white bed sheet and just painted it with basic green paint. It becomes a stiff starched fabric texture, which works well for hanging it on a wall. To light it, We used just work lights (3 100watt bulbs + unknown wattage) to light it. The lights we used were like this: We just had to play ...


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 ...


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

This won't be a full answer to your question, but LearningDSLRVideo has a few clips about DIY greenscreen--more from a shooting/software standpoint, than the physical setup standpoint, though. How to Key DSLR Green Screen DSLR Green Screen Test DSLR Green Screen Test with Premiere CS5


3

I've reflecmedia chromakey with good results using a DSLR for both stills and video, producing great easy to key files. Reflecmedia Pop up screen We plan to use this as part of our DSLR HD Video DIY Greenscreen Training course at United By Photography.


2

I haven't tried chroma keying in Final Cut Express, but I'm pretty sure it depends on your needs and workflow. If you use Premiere for editing movies than AE should be more integrated. Yet, if you really want to get awesome results and have some spare bucks, I'd say you look at some plugins. After all neither AE nor FCE is specialized in chroma keying. ...


2

I've heard green table clothes from a dollar store work very well. You can stack them to make them more opaque if you like, and the lighting is more important than the material anyway.


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

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 ...


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 ...


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.


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 ...


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

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 ...


1

While not a direct solution, AVISynth supports creating a mask from a Chroma key using ColorKeyMask. You can then use that mask to blend the two layers together by using Mask on the top layer and then Layering them together. You could then just feed files in to the script and use FFMPEG or something similar to write out the frame stream from AVISynth. ...


1

What with the felt-tip pen and the transparency of the writing surface, this actually looks more like they're writing on a transparent whiteboard. Probably perspex, or plexiglass. This type:


1

If you need to rotate large objects, you could try a Lazy Susan



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