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Blue/Green screen video

Started by Tessa Gray 10 Jul 2012 12:45pm () Replies (21)

Hi all, just looking for some help. A local school is about to start making video stories using green/blue screen technology. What software/extras are people using in schools for a PC, Mac or other?

Any preference for blue or green screen? Equipment? What works best?

Green screen

Replies

  • Sean Lyons (View all users posts) 10 Jul 2012 12:59pm ()

    We aren't a school, but I thought I could add our bit anyway!

    We have a large painted wall here at NetSafe, that we did our selves using "Digital Green" paint that we bought from Resene's. It works really well. We use Premiere Pro on the PC which has "keying" built in for the removal of the green and addition of backgrounds as standard.

    They success of the effect depends very much on the lighting, and being able to get rid of any light artifacts by producing a constant colour without shadows behind the subject. 

    We choose green vs blue because we were told that the green channel usually provides the least problems with clash in the subjects, but in reality its more of a case by case basis, so flexibility of green and blue would be best (Say with pop-up screens)

    Here is an example of a video shot entierly here in the office using our green wall and a small sony HD video camera.

    http://vimeo.com/user6064691/scammed

    hope that helps

    Sean

  • Tessa Gray (View all users posts) 10 Jul 2012 1:42pm ()

    Thanks Carol and Sean for equipment and software ideas. I had wondered about the blue vs green debate. The video is funny and relevant Sean, that guy certainly looked dodgy Wink!

    That was my next wondering too - how are people using this technology in learning experiences? Any examples/ideas would also be greatly appreciated.

  • Carol Kendall (View all users posts) 10 Jul 2012 2:53pm ()

    Here's one example, used for our Book Week - Books can take YOU anywhere!

  • Steven Wills (View all users posts) 10 Jul 2012 4:45pm ()

    https://vimeo.com/24700901. Excuse the untidiness - disused room. This PVC frame has holes drilled to thread a bungy cord through. This gives tension to the fabric. I've only used macs. It seems to pretty easy but there are a few tips and tricks. Lots of clips on YouTube to show how it's done.

  • Carol Kendall (View all users posts) 10 Jul 2012 1:03pm ()

    My understanding is that iMovie on Macs only works with Green Screening. Someone can correct me if I'm wrong, but it used to be the case. Hence, we bought a large green screen from TradeMe for around $90, including shipping. We pin it to the wall, as required, because we're very short of space.

    As far as using the instant alpha tool in Pages and Keynote goes - any relatively plain colour background will do.

  • iDave (View all users posts) 10 Jul 2012 9:22pm ()

    Hi Tess - I have 'green screened' quite a bit with kids using iMovie.  iMovie has both blue and green but have found the green has worked better then blue.  We use a portable screen made from material from Spotlight.  They had the right colour at the time.  

    Lighting is important - and minimising shadows.  You can also fine tune using small incremental video adjustments once you have applied the effect (if you know iMovie)

    In the past we have used MovieMaker 2 - blue screen with a plug in found on the WWW. Does not work with MM Live.

    Premier Elements (PC) is great - you can 'chroma key' in a variety of colours.  There is a cost but good software. Sony Movie Studio (cheapest of the Sony range) also works well.  

    Dave

  • Tara T-J (View all users posts) 10 Jul 2012 11:37pm ()

    Hi there

    I agree the green works best on iMovie.  Quick tip, do make sure that you have the advanced tools enabled on iMovie.  iMovie comes with them disabled which can keep you guessing for a while.  To enable the advanced tools go to preferences and check 'show advanced tools'. Another problem I have encounted is that one of our uniform items is a green top which can be a real pain.  I often thought it would be good to have a screen that was green on one side and blue on the other for this reason.  Sometimes too you might notice that kids can come out looking quite washed out.  You can play with the colours on the video adjustments on iMovie to help fix this.

    We have a portable commercially made green screen at my current school.  Prior to this I used green cloth from spotlight which worked just as well.  

    A good intro to green screening is getting the kids to speak to an artwork they have done (something digital or simply a scanned artwork), Here is an example of this using the cheap spotlight screen (apologies for the sound issues). 

    Tara TJ

  • Stephanie Thompson (View all users posts) 11 Jul 2012 10:37am ()

    My Dad works in the film industry and in fact imports green screen so I was fortunate to get some for free. One of the biggest problems in using green screen is light. You need to make sure that the scene is lit properly or you will fade into the background so speak.

  • Jenny She (View all users posts) 11 Jul 2012 12:34pm ()

    Hi there!
    I have made many movies using green screen over the past 2 or 3 years.  I think green screen is the screen you used for Mac users and blue screen is for the PC users....you can correct if I am wrong.

    Our school has a green room for us to use but prior to that I just used a piece of green material which I had purchased from Spotlight.

    Here is one of the movies that I made using green screen:

    http://littlevoiceslittlescholars.blogspot.co.nz/2012/06/we-are-learning-to-cross-road-by-room-6.html

  • Rebecca Ronald (View all users posts) 11 Jul 2012 3:37pm ()

    I've enjoyed using green screening in the past when I had adobe premier. I found that in desperate need I could even use a clean whiteboard as my 'green' screen, although it was a bit interesting on the day I tried it while wearing a white shirt! I don't have Premier Elements at my current school, and although we have Adobe Master Collection CS5, it doesn't seem to have Premier with it :-(

    Rebecca

  • Tessa Gray (View all users posts) 13 Jul 2012 3:35pm ()

    Wow thanks everyone for your input on this so far. Great ideas to pass on. 

    What a lovely example from your blog on, 'books can take you anywhere' Carol, simple idea. Great way to ask a question online - through video. Thanks for sharing.

    Thank you for sharing your example too Jenny. I love watching examples online, where the students tell us what they're learning about or learning to do (Road safety). Your example of green screen with the students in front of their work is captivating. Nice to know the 'youngest ones' can do this too :-)

    From Road safety to Cybersafety, a weeee while back some GATE students from Marina View school made an awareness movie/ad about text bullying , which also makes for a good context for using green screen.

     

    Steveyour walk-through tour is VERY practical for your learners. Thank you so much for the references to the screen taut, the wide angle camera, Youtube. I do like that funky opening music! I'd love to see what your teachers and students have been up to too :-)

    The other ideas for screens (iDave), top tips for iMovie and advanced tools (Tara) and lighting (Stephanie) has been every useful too. I have worked a little bit with green years ago, and never knew why we were getting the 'washed out' look. What kind of lighting arrangements specifically will help fix this? Is it something we need to buy?

    Rebecca, your number 8 wire mentality to use your white screen has made me smile. I'm interested to know if it worked for you?

    I wonder if there's any web 2.0 tools that can do this too?

  • Steven Wills (View all users posts) 13 Jul 2012 8:37pm ()

    Tessa, as requested here are links to films with green screening. Enjoy.

    https://vimeo.com/29075055

    https://vimeo.com/24550024

    https://vimeo.com/24447427

    https://vimeo.com/24108372

    https://vimeo.com/24100870

    https://vimeo.com/22407230

    https://vimeo.com/24443891

    https://vimeo.com/25642238

    I have to admit that I am a relief teacher at the school and fim making is a passion of mine. The teachers are becoming increasingly enthusiastic about using video to demonstrate understanding.

  • Tessa Gray (View all users posts) 16 Jul 2012 4:13pm ()

    This has been really enjoyable watching each example, thanks again Steve. What a lot of fun! Certainly brings learning alive beyond ONE DIMENSION.

    I really enjoyed the Van Gogh style artwork and informative commentary that went with it. Was very powerful to watch video as well as still images in the background and there's some lovely camera angles too (shoes). I see great potential for individual/group story telling (Gingerbread man) and lots of different genres in literacy developed as well (research, reporting, trips, sequential writing). There’s loads of ideas that can come from bouncing off these examples Thanks so much.

    Once again the music is very entertaining, helps tell the story. Have you used Creative Commons sound/music at all?

  • Steven Wills (View all users posts) 16 Jul 2012 4:47pm ()

    Tessa thanks for feedback. I enjoy making them as much as the children. I get most of my music from http://freemusicarchive.org/ My next suggestion for its use is to portray a monologue where the character is filmed answering questions they may have about themselves or others.

  • Louise Tredinnick (View all users posts) 16 Jul 2012 9:15pm ()

    Hi Tessa, I'm also wanting to get into Green Screen but have never done this before.  I notice that Sean suggests to use  Premiere Pro as the software but this costs doesn't it?  I have iMovie at home on my Mac and ipad but I need to be able to use PCs as that's what we have in the computer lab.  Can anyone suggest the easiest and preferably free software to make a green screen movie.  I can't wait to understand how to do this as I see so many great learning possiblilities.

  • Fiona Robertson (View all users posts) 16 Jul 2012 9:53pm ()

    Hi Louise

    I have been reading the post on this topic and have always wanted to be able to use green screeing on a PC as this is what we have at school. I had a play on the weekend and found out how to do it.

    First you will need to down load paint.net . You also need to download chroma key watch this you tube clip to show you how to do this. Then I found this  link on
    Waiuku elearning Pd which tells you how to green screen using paint net. And yes it does work and is fairly easy to use.  Hope this helps.

  • iDave (View all users posts) 30 Sep 2012 8:04pm ()

    This is a bit delayed but a useful update for those who may be still interested.  While getting ready for a workshop I revisited chroma key on the PC

    Now have blue/green screen working with Windows Movie Maker 6.0 running on the evaluation version of Windows 8. Works well. (was running ok on Windows 7 too)   

    Using the 64 bit version of WMM 6.0 (free) and the set of filters called RehanFX.  The only thing I had to do was check the versions and install DirectX (from Microsoft online)     RehanFX does cost $15 but you can trial the blue/green effects and see how well they work for free.  (... and work around the watermark.......)  

    Note: this will not work with Movie Maker Live but you can have both installed.

    Let me know if interested in more detail.  (...and just bought more green material from Spotlight....)

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