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Using Adobe SpeedGrade CC, powerful professional color correction and color grading is available to anyone with a Creative Cloud membership. In this course, professional colorist Patrick Inhofer offers a project-based learning experience to get you familiar with the SpeedGrade tools. You'll work three different types of projects through the color correction and grading process, which includes getting projects and footage into SpeedGrade, color correcting and grading shots, and then rendering and outputting shots. Each step of the process is rich with lessons and anecdotes that are applicable to real-world color grading scenarios that editors, producers, and other creatives will face.
This course was created by Patrick Inhofer and produced by Robbie Carman. We are honored to host this content in our library.
In this movie I'm going to show you an extremely useful feature here in SpeedGrade CC and that's the scene change detect feature. And perhaps the best way of explaining it is to show it to you and if you have access to the exercise files be sure to select that. Make sure you've selected sequences from folder and subtree, I'm going to turn off all my filtering, so I'm filtering all my files and I'm going to load up 03_02scenechangedetec.ircp. (LAUGH) we're about to change that because I'm going to come back here.
Re-filter back to my movie formats. Scroll down, and select the movie scenechangedetect.mov. Now, in order to get the scene change detect to work, I have to add it to my timeline. So I'll click the plus key. And I have added it to my timeline I press the D key to pull up my viewer and I'm going to go ahead and click play and essential what you are looking at here is an entire scene that's been rendered out as a single self contained movie. This can be extremely valuable and work flows where maybe (INAUDIBLE) They couldn't get it down to one video track.
So we just had them render it out as one long flat movie. The problem is well how do I go in and individually grade each of these clips as stand alone shots. The answer is we need to come in here and add edit points every time there's a shot change. Now of course we could do this manually and come through play it down. Pause it every edit point, add a key frame and keep moving across. That gets to be very very tedious especially because SpeedGrade has an automated way of doing this for us. It's called scene change detect and you get to it by highlighting the clip in the timeline, selecting the timeline tab here.
Going into the set-up sub tab and selecting scene change detect. When I click this button, it's going to automatically pull up this little dialog box, and SpeedGrade is now going frame by frame through the entire shot, and looking for places where it thinks the endpoint actually exists. This workflow allows me to take in sequences from Premiere, from Final Cut, from Avid, from smoke, from about just any other editing app that can render out a single self-contained movie, allowing SpeedGrade to be an extremely flexible tool. Now, the scene change detect is finished.
This dialogue box opens up and essentially what we're going to do is go through what the scene change detect found and we're going to modify and fix any problems we might find. So the first thing I'm going to do is scan through this bar graph and this bar graph is, it's really quite simple. Every bar along here is an individual frame and as I scroll through, I'm going to come up with these blue bars. These blue bars are what SpeedGrade thinks is a scene change. So as I scroll through this you can see where SpeedGrade thinks all the edit points are.
So for instance near the end of this film, I've got these long bars up here and what's happening is there's a lot of activity going on screen. And that's what it's showing you but it's not necessarily, it doesn't think. Speed Grade doesn't think this is an actual scene change. And what I can do to confirm that is simply click and drag. And now I can go frame by frame watching this little preview window, seeing if indeed there's a scene change there. And look right there, there is indeed a scene change on this blue bar.
Now I can come forward and go backwards from blue bar to blue bar. So I can go backwards one edit, go back one frame. Yep that's a different frame. Yep that's an edit point. Next edit point, go back one frame. Yep, that's an edit point, press forward, one edit. And now I'm looking at this, I go back one frame and no, that's not an edit point. That is just an area of motion blur. That SpeedGrade detected and, thought was an edit point and it's not.
So now I've got a couple different choices. I could change the sensitivity. What's the sensitivity? It's this orange line right here. If I hover over this bar and slide it to the left while holding down the Shift key to make this move real quick. You can see, I'm lifting up the sensitivity, and I can keep lifting this up until that blue bar goes away. And, now it no longer sees that as an edit point. And, now I can come back and see, have I lost any other edit points here, and it doesn't look like I have, so you could see how useful the sensitivity scale is in filtering out false positives.
Now, if I were to come in here and reset by clicking this gray box. And now I've reset my sensitivity back to where it was, I'm come to the back end where I know this is a false positive. The other way I could have gotten rid of this false positive is using this little checkbox. If I just deselect that, it no longer thinks it's an edit point, I've manually made that change. Now I no longer have the option to change my sensitivity settings, so usually, what I want to do is first. Set the sensitivity to there where I think is the optimal value and then I'll go in and make these manual changes.
Now that I've gone through and gotten rid of my false positives, I'm going to split this into individual clips so now when I click this. There we go, and because now we've taken this and, kind of, tricked SpeedGrade into thinking these are all individual clips, there are a whole bunch of different work flows, including applying looks and saving off looks and all of this stuff that we'll be talking about later in this title becomes very easy to do, now that SpeedGrade thinks these are all individual shots.
So there it is. Scene change detect. So people call it automatic scene detection, automatic scene cut detection. All the same thing. All available to us here in SpeedGrade CC.
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