Green Screen Darkens Background Clip

I am trying to composite via iMovie's green screen function two quicktime movies generated by a 3d graphics program. One movie serves as the background and the other is the greenscreen overlay. The overlay movie is a line drawing with black lines on a 100% green background (rgb 0, 255, 0).
The two movies do composite and the green is clipped out of the overlay movie, showing the background movie playing underneath. However, the background clip is now darkened and the line art in the overlay movie has changed from black to white.
How can I avoid this?
I have noticed that when the green screen overlay movie overlaps the background clip into which it was added and runs over the next clip, that the portion in the next clip overlays perfectly - black lines and a background movie that retains its original brightness.
Any advice or help?
I can post a screen grab of my setup in iMovie and I can post the sample movie as well, if that would be helpful.
Thanks!
-- Anthony

I took your PNG and tried it. It didn't work with the PNG. Apparently, static sources like images don't work either. However, I was able to put it into a movie format of about 2s and it worked fine. I had to fill in some areas that you left green.
There are a couple of problems with the image too:
1) The green background actually contains some red. If you zero that out, you minimize the effect on other colors in your overlay and movie.
2) Not everything that I presume you wanted to be "visible" was actually filled in. The face was the background (except for the eyes and mouth... but maybe you wanted that... I filled it in so I could better see the face).
3) Some of the colors you chose for your character ended up with green in the level of your greenscreen. For example, the stripes had green in the range of your greenscreen. That's why you want to limit the green in the background to the 249-255 range. Then you have the other green levels to use for coloring. Actually, you might even be able to get away with using 254-255. That way you have almost the entire green spectrum to use. You might even be able to use green of 1-2. I don't know how that will work, but it might work even better, but I've only tried "ultragreen" for the background.
The way I created a "green screen" for stationary things was to export the presentation as a .mov file. Basically, File -> Export ... under there you have the option to do a "Fixed Timing" export. I usually make sure all transitions happen automatically (not on click). You can check that in the inspector. Then you set the slide time and build time to get the timing you need for your greenscreening. There are some other places on the net that explain in more detail how to use keynote to create effects for iMovie. I use it a lot for titling. But it can be used to send your character into space as you tried to do... I didn't have a clean copy of your movie so I couldn't greenscreen it for you. I tried it on some video I took over christmas. Kind of weird result (the combination... the greenscreening worked fine).
Message was edited by: roboknight

Similar Messages

  • Best approach for green screen over multiple clips?

    So I know this may fall under the category of after effects, but starting with a project in premiere with many clips and cuts, what would be the best way to apply green screen over all of these clips? I'd think that making all of these clips after effects compositions would be excessive and not the best approach. So is there a better way to go about doing this?

    In these cases it's best that you test with one clip before going all in and having to change direction after much is done.  You can get by with Ultra Key in PPro if the screens are done correctly and clean enough.  Much will also depend on the expected result.  That is, you may wind up doing lots of tweaking for shots that might not pay off if they're quick/action, etc.  I usually go round house for AE involving complex shots that need to be really clean, but have opted for Ultra in PPro for quick clips with action.  When I do use Ultra Key I use more than one instance of the key.   So, test it both ways and use this as an opportunity to know the Pro's of both methods.

  • PIP / Green screen only using clips from project libary

    Hello,
    I've been experimenting with iMovie and looking to combine some clips and do some PIP, Greenscreen, etc. The only way I combine 2 clips to to drag it down from the event library. Is there no way to combine 2 clips from the project library?
      I ask this because all the clips on the project library are edited, cut and ready to go. The event library footage is hours long and raw, seems like a obvious thing to be able to combine 2 project libary clips but I cannot seem to do it.
    Failing that, I though maybe add the Project library clip to the event library and do it that way but that also does not seem to work
    Hopefully I've explained myself ok, if you need any more info or explanation just ask.

    Yes, you need to drag clips from the Event Library to the project.
    If you need to use some edited project clips in a project, you should use the SHARE menu to Export Using QuickTime. Choose Apple Intermediate Codec as the video codec, and save it to a place where you can find it. Then you can import it to an iMovie Event using FILE/IMPORT MOVIES...

  • Why is the green screen visible on the last frame before the next clip?

    Hey guys!
    Maybe I'm ******** but i m having trouble here. I have "key-ed" a bunch of clips and successfully removed the green screen from them. But when placed in the timeline, the green screen of the clip reappears for the single frame before a next clip starts.
    I've re-rendered and chopped ends off but the green screen keeps appearing in the last frame of any keyed clip that is about to cut to a different clip.
    Where am i going wrong?

    Hey! I tried both suggestions but even the self contained quicktime file has the green screen frames popping up.
    I just dont get it, it's infuriating!
    I used "chroma keyer" effect on the clip, only enable "key on saturation", the green screen disappears, I place clip on V2 and image on V1. Image is then visible where the green screen was. All is well until the last frame before a next clip because on that ast frame the green screen appears again. Where am I going wrong? Please help!

  • The best green screen work flow for FCPX

    I over 300 clips done in green screen. Some clips are 10 seconds some are 5 min. I need to prep them for import into Motion 5 where they will be keyed and background graphics will be added.
    The way im doing it now is dragging the chosen shots into one storyline then do one massive export of all the clips to one clip.
    Does anybody have a better way of doing this?

    Right now there is no roundtripping available for clips in FCPX --> Motion --> FCPX. Your only option is via your current method (export/reimport), or as James said, start your workflow inside Motion.
    Use the Feedback page to enter the feature request to Apple (I've done this already myself).

  • IMovie 10.0.8 Event Footage Not Sync'd After Green Screen Conversion

    I am using iMovie on a 2013 Late Macbook Pro 13" Retina 2.4 GHz iCore i5, 8GB RAM., Intel Iris 1536 MB.  I record on Canon 1080p 30 fps MXP.  The event footage plays fine with green screen (GS) background.    But when I create a Movie and first add background then event footage and convert to GS to replace GS with picked background, the video eventually gets out of sync with the video.
    Thx

    I am using iMovie on a 2013 Late Macbook Pro 13" Retina 2.4 GHz iCore i5, 8GB RAM., Intel Iris 1536 MB.  I record on Canon 1080p 30 fps MXP.  The event footage plays fine with green screen (GS) background.    But when I create a Movie and first add background then event footage and convert to GS to replace GS with picked background, the video eventually gets out of sync with the video.
    Thx

  • How can I use iMovie on my ipad mini to create a video from still shots using a green screen?

    In my physics class, I am doing a project where we are taking pictures to create a movie, and we are usign a green screen. I know that iMovie on the mac devices is able to transfer photos and videos from a green screen so that you are able to insert backgrounds where the green screen is. Is there any way to be able to change the settings on the iPad mini to be able to do the same things with a green screen and backgrounds?

    Also, I tried changing my primary email on Fb to what it was years ago, etc and I still wasn't able to delete the account.

  • My video is suddenly really slow before flashing a bright green screen.

    I started editing on my Macbook Pro with my FCPX free trial, then went back to edit the same project on a school computer. I've done this countless times before with no issue, but the program is suddenly running really slowly. If I try to play, the footage will start fine, but after 2 or 3 seconds it will start lagging until the video goes away entirely and is replaced by a bright green screen. Moving clips around also causes the turning wheel to appear for at least 20 seconds before I can finally continue editing, but even then I can only do that one move before the turning wheel comes back.The footage is only 3.5 minutes long, and I'm not trying to do anything I haven't done before.
    What could be causing these issues, and how do I fix them?

    Tony,
    The video is from the same camera as all of my other projects (JVC 100), but since it is a partner project, another girl filmed it (she has had no issues). My hard drive crashed on the 6th, and prior to that FCPX would not open while it was connected, but had no problem opening without the drive. I think it's safe to assume that it was my hard drive causing all of the problems, but I'm going to go in and ask an Apple employee if there is anything else that I can do to prevent this from happening in the future.
    Thanks for all of your help.

  • I've tried 50x to do a green screen. I need step by step help. I have my green screen clip and my scenic background but I can't do it.

    I've tried 50x to do a green screen. I need step by step help. I have my green screen clip and my scenic background but I can't do it.

    Show us a frame grab of your green screen clip.
    HA\ave you done a web search for a vidoe tutorial on Chroma Screen Keying in Premiere?
    Adobe Premiere CS5 Green Screen / Chroma Key Tutorial - YouTube

  • Live type files look grainy and do not fill the background when used for green screen backgrounds.

    live type files look grainy and do not fill the background when used for green screen backgrounds. Ideas?

    What I want to do is somehow make my entire iMovie project smaller by compressing it somehow but without losing any footage or audio or quality. At the moment the project is a 56GB iMovie project lasting approx 1hr. I have a mixture of miniDV footage, titles created in Live Type (they are better quality than anything available in iMovie) and audio.
    The miniDV footage is automatically compressed when it transfers from my camcorder to my Mac, no worries there.
    The LiveType titles contain a motion background (imported into LT) and then text which appears and disappears at set points. The titles vary in length but are about 5 seconds each.
    The file size for the LT titles is approx 180MB per clip, the movie requires about 20 or so of these clips, making a very large file size overall.
    Is there a way that I can save something in LT so that the file size is smaller yet still keep the quality and use the clip in my iMovie ?

  • Strange problem when editing green screen clips

    Hi all,
    I work as a technician in a High School.
    Recently I was doing some green screen work with a class, we were using 10 macbooks to edit. Out of the 10, 6 had this same problem;
    At some point after inserting the green screen clips and the background, the project part of the iMovie window stops displaying anything, iMovie acts like the clips are still there though (If I move the cursor over the now empty space, I still see a preview in the preview window). But nothing is visible and nothing can be moved or changed.
    Closing iMovie and reopening doesn't work, restarting the macbook doesn't work. The problem seems to be saved to the project file, if I open a new project, the new project is fine, but if I re-open the broken one, it's still broken. The only thing we could do was completely restart and delete the project file.
    I hope this makes sense, due to this problem half of the class couldn't finish their work. The same problem has also occurred to another student who was working with green screen in iMovie 09 on an iMac.

    Hi Ted,
    I've seen this issue before. One thing to remember is that iMovie has a live rendering feature, so sometimes during playback, the viewer does not always display correctly.
    I don't know if you tried taking the green screen clip out, then re-adding it.
    Also, trying to simply delete the preference file can fix the problem. Home folder>library>pref>imovie.plist
    delete that and see if the problem persists.
    Doing this will not effect any projects students have made in iMovie.

  • Is there a way to apply all adjustments to a clip when using green screen effects?

    I use imovie '11 and I shoot a lot of videos using a green screen. Once I import my videos into imovie, I then place a background image into the project and then I drag the video clip over the background and select green screen. I usually then have to crop the clip so I am centered within the frame, and I also have to adjust the colors manually since sometimes with a greenscreen the colors can be a bit off.
    My problem is this, how can I apply all video adjustments that I made to one clip, to all the other clips without having to do each one manually?
    Currently when I crop a clip and edit the colors, then I copy it and go to paste adjustments, 'video' and 'video effect' are grayed out, however, it lets me do all the others. Does imovie not let you paste video effects to other clips that are in green screen mode? I tested it with two regular clips that are not in green screen mode and it works fine.

    As always there's a trick using copy and paste.
    Once you got all the adjust correct on the first clip. Go to Edit > Copy. It's as though you were going to paste it back into the project, only now the trick is to highlight all the clips that also will need these same adjustmust (hold down the Command key, and just click on each one). Then go Edit > Paste Adjustments...>All. That wil apply each of the adjustments to the whole batch of video clips you had highlighted in the previous step.

  • I need help using Ultra Key on a green screen clip.

    I am using Adobe Premiere Pro CC to edit a blue screen clip, however, once I apply the Ultra key to the clip, I notice that when I start to render (using Adobe Media Encorder CC), the top part of the green screen clip gets blocked (cut off) by the replacement background! I have tried different backgrounds but I keep getting the same chest-to-head level blocked off with the background. When I remove the Ultra Key and render the
    clip with it's green screen, then it renders just fine! BELOW IS A SCREEN SHOT OF MY PROBLEM.
    Help!!
    Thanks, Dru

    Today 2014.2 was released. Might want ot update.

  • Why don't green screen clips snap together in imovie 11?

    I film hundreds of green screen videos per year. I used to use imovie09, and when dragging one green screen clip next to another they would snap together. Now that I upgraded to imovie 11, it no longer allows you to snap the clips together, you have the cut the background in between them. Is there anyway to get these green screen clips to snap together like they used to in imovie09?

    Well, now I'm even more confused.  I exported my iMovie project from my Mac Book Pro to my iMac and it worked perfectly.   Then I exported the same project to my Mac Book Air and it worked fine.    But when I go back to my Mac Book Pro - green screen effect simply shows as black and non transparent.   So, I have a work around but am puzzled why my Mac Book Pro doesn't work.   All systems on updated version of Lion and all have latest version of iMovie '11.   My Mac Book Pro is a mid 2009 - 2.8 Core 2 Duo and curious if anyone else has experienced this.

  • Green screen background

    I understand how to create the green screen and how to mask it out...what I can not figure out how to do is add another background behind the person in the green screen.  Is there a tutorial I can use?  It seems so simple but what I found in the help section did not do a step by step how to....apparently, I need that!  Please help someone...anyone???? Thanks!

    Basically, you would place your "background" Clip on Video Track 1, and the green screen Clip on Video Track 2, then apply the Green Screen Effect to that Clip on Video Track 2, adjusting it for the green screen.
    Here are some TUTORIALS, but I'm not sure which are specific to Premiere Elements. Still, the process is the same.
    Steve Grisetti also covers Green Screen Keying in his PrE books, available at Muvipix.com. Not sure if he covers it in his Learning Series, or his Tips & Tricks section, also on Muvipix.
    Good luck,
    Hunt

Maybe you are looking for