9 Replies Latest reply: Aug 19, 2012 3:23 PM by able123 RSS

    PPro v2 chroma keys - help?

    angelalien548 Community Member

      I'm working on a movie clip, I'm following lesson 13-4 from the PPro classroom in a book, and I want to use the chroma key to key out the sky in the sequence and superimpose an alien sky onto this clip. I've got a still image of an alien sky.

       

      Here's what I did so far: I moved the video clip from Video 1 up to video 3 and the still image to video 1. Currently I'm trying the drag the Chroma Key from the Effects panel onto one of the video tracks as indicated in the lesson, but I keep getting a symbol that is a circle with a slash through it as I try to drag the chroma key onto one of the video tracks.

       

      I'm a bit confused as to where exactly do I place this chroma key in order to key out the sky at this point - in the video 1, video 2 or video 3 tracks and do I place it before the clip starts or after the clip ends?

       

      How can I drag the chroma key onto the appropriate track without getting this "no" symbol?

       

      Also, I'm a bit confused by the instructions from this lesson - first it says to drag the the photos onto the video 1 and the video 2 tracks (but currently I'm working with only 1 photo at this point) and then it says to place the photos after the clip you worked on earlier - what exactly does this mean?

       

       

      Thanks in advance.

        • 1. Re: PPro v2 chroma keys - help?
          Community Member

          I only use cs3 and dont have that lesson you are following. but typically you drag the effects on top of the video you want that effect to work on. So you dont drop it before or after the clip but right on top of the clip... the no symbol should disappear when over the clip.

           

          good luck !

          • 2. Re: PPro v2 chroma keys - help?
            Ann Bens CommunityMVP

            Dont drag the effect onto the track, but drag it onto the clip you want to key.

            Track one is for your alien sky

            Track two is for the video that has been keyed.

            • 3. Re: PPro v2 chroma keys - help?
              angelalien548 Community Member

              Actually what I'm trying to do in this project is, I have a motion clip of a road scene of a bus carrying people, as the bus moves from the R-side of the view monitor to the L-side, it gradually grows larger during its motion across the scene, and what I want to do is cut this moving bus out of the original scene and add it as an overlay to the alien sky photo so that when I play the clip, it looks like the bus is traveling thru outer space near an alien planet. For the past several hrs I tried in vain to use the chroma keys (although I did locate the Effects Controls Menu and has successfully added a Chroma Key to the original scene), then a Green Key to the scene, but this did not isolate only the bus, so I exited PPro without saving, reopened PPro, and this time (sort of discovered this by accident in my PPro v2 Classroom in a Book) I used a 16-pt Garbage Matte Key to isolate the bus, but when I play the sequence, the bus grows underneath the hole that I cut (or under the hole in the black mask) out as it moves from the R-side of the view monitor to the L of the view monitor, this hole in the black matte remains stationary, stays the same size, not changing/adjusting according to the movement of the bus.

               

              How do cut out the bus (which I thought I did when isolating it with the garbage matte) and overlay (composition) it on top of the photo of the alien sky so that the bus looks like its traveling across this alien sky?

              • 4. Re: PPro v2 chroma keys - help?
                Ann Bens CommunityMVP

                Did you animate the Garbage Matte over time?

                • 5. Re: PPro v2 chroma keys - help?
                  Community Member

                  what youre trying to do is why people shoot stuff with green screen and blue screen etc ( chroma key ) ...where the background becomes transparent and you can drop in whatever you want in its place. Since you didnt do that with the bus, and have a 'sky' the chroma key filter is not seeing one "field " of color to make it transparent...like basically eliminate it.

                   

                  sooo, if you try to use the chroma key to block out that background you'll also get other tonal ranges and colors elminated in your image you want un-affected ( the bus moving etc and not just the " sky " ).

                   

                  Sooo, unfortunately thats your first problem and is hard if not impossible to do.

                   

                  secondly, using a matte ( as ann pointed out ) you would need to animate it frame by frame to keep up with the bus you want to preserve. In other words,  you'd need to draw a section of the image you want to eliminate ( or save ...is same thing but just opposite ) ..and animate it to follow the "action".

                   

                  It's really tedious and hard to do cause you have to deal with so many frames of " change " if you matte it out...and animate the matte.

                   

                  The program will do a lot of tricky stuff to tween the frames as best it can, but in the long run you really should shoot stuff without having to spend all that time ( frame by frame ) rotoscoping the thing....blocking out what you want to keep and what you want to get rid of.

                   

                  However, people do tend to give you a lot of leeway in their minds about what is " believable " when it comes to a bus going to another planet... so if you animate the matte like Ann suggested, it might work out OK !  How cool it THAT ? !

                   

                   

                  • 6. Re: PPro v2 chroma keys - help?
                    angelalien548 Community Member

                    Thanks. These dsys, I'm involved in learning modeling (scene/character modeling) in 3DS max (got the 2011 version), it runs on my Dell M1530 laptop that has XP (32-bit) as its only OS), got the first of 2 3DS max modeling boks that I've ordered online that pertain to movie prodeuction, the first book is 3DS max 6 animation and visual effects techniques, (this came in the mail the other day) and the other 3DS max 6 book is "3DS max 6 animation: CG Filmmaking from Concept to (Consumer)" (am still waiting for the arrival of this 2nd book in the mail) and someone on another form told me that these books will still work for me even though they're both old and outdated.

                     

                    So what I'm asking basically is, once I have all of my scenes and characters modeled using 3DS max, will I be able to put the film (movie) together and burn it to DVD (along with scene/chapter menus like the way the DVD movies that you buy in stores such as Barnes & Noble or Fye has 'em) using my copy PPro v2 and Encore v2/CS2?

                     

                    And will I be able to use my copy of Audition v2/CS2 to manipulate the speech files that I'm planning to create using my copy of Text-To-Wav software (its where you can manually type in what you want a movie character to say on sort of a wordpad-like interface) and you can save this as a *.wav (sound) file that will play back the audible speech exactly the way it was typed into the interface when you open it in say a video/audio player such as VLC media player so that I can make the *.wav file play back as a woman's or man's voice, or a child's voice, or whater/who-ever's voice I want this particular *.wav file to sound like when played back as an audio file?

                    • 7. Re: PPro v2 chroma keys - help?
                      Community Member

                      hiya.

                      sounds like fun, doing the 3d stuff etc..lots to learn.

                       

                      I only have cs3 so dont know about version 2 and what you can or can't do. A lot of people here will probably remember that version though, and help you more.

                       

                      Also, I have maya and only use that ( and don't use it that much at all because like you I am learning how to use it and it is complicated for my snail - like brain ).

                       

                      However, in terms of general work flows maybe I can mention a few things that will help.. and just remember I'm talking about maya and cs3.

                       

                      I also have windows xp and mousey computer, so I can really only work with SD movies. HD makes my computer gasp for breath.

                       

                      So I set up my projects in maya with the idea that in the end I will export it for SD to go into cs3 with that...

                      Consequently I have several options on the exports from maya...

                      a) numbered still images

                      b) avi movie

                      etc.

                       

                      I have found that the numbered still images are nice to work with in cs3.

                       

                      So I set up the project in cs3 for export to SD, which means even though I'm using numbered stills from maya ( with alpha channel ) I set up my project as SD NTSC 720x480 and choose par to suit my 4:3 or 16:9 aspect ratio ( usually I use 16:9 with par of 1.2 ).

                      Then I also choose a video renderer in new project that matches what I'm going to export more or less ( usually lagarith avi ).

                       

                      In CS3 the alpha channel comes in with the numbered stills and that is where I drop in whatever background images or stuff I want to add ( like what you were saying about using chroma key to make a new sky ... the alpha channel is transparent, so you just add that sky without chroma key necessary ).

                       

                      wav files are nice to work with in CS3 and I've never had any problems with them.

                       

                      hope some of this helps and good luck and have fun !

                       

                       

                      • 8. Re: PPro v2 chroma keys - help?
                        angelalien548 Community Member

                        able123 wrote:

                         

                        I also have windows xp and mousey computer, so I can really only work with SD movies. HD makes my computer gasp for breath.

                         

                        So I set up my projects in maya with the idea that in the end I will export it for SD to go into cs3 with that...

                        Consequently I have several options on the exports from maya...

                        a) numbered still images

                        b) avi movie

                        etc.

                         

                         

                        I'm not planning on working on HD movies, either, Able, I'm thinking that after all my scenery/characters are made in 3DS max I'll probably want to export it as avi movie, since my copy of PPro is definately able to import avi movies (I've even tried this using Streamclip on these *.vob files I mentioned a while back, and I was successful in bringing the movie into PPro in this way). Anyway, so far, I've got a  copy of this book, "3DS max 6 animation and visual effects techniques" (with accompanying CD), and am waiting for the arrival of a second 3DS max 6 book in the field of filmmaking, this is  "3DS max 6 animation: CG filmmaking from concept to completion (consumer)" and as far as I know (saw the table of contents of both books from the previews on the seller's websites) both of these books (although old and outdated) take you by the hand and show you how to do things when it comes to making movies.

                         

                        Regarding your mention of CS3, which Adobe product are you talking about - I'm a bit confused?

                        • 9. Re: PPro v2 chroma keys - help?
                          Community Member

                          premiere pro cs3 editing program

                           

                          I dont have your version