OK, tutorial time. First, fire up Premiere and load up your project. To make the video bounce, your clip has to be located in video2 or higher, so drop it there. Now in your timeline, scroll around until you hear a beat. Use the arrow keys to find precisely where it starts. It helps to have the audio track showing the waveform but isn't required. That basically translates to "take the two seconds to unfold the waveform for that track."
When you find the beat, use the arrow keys to move your timeline marker one frame EARLIER. I'm sure there's some scientific way to explain this (eyes process input and sync it to audio at a delayed rate or something) but the bottom line is you're going to make your bounce start 1 frame early because any cut you make EXACTLY on the beat WILL look slightly off sync when you play it back. Yeah, it looks OK, but you can do better. When you're done, it'll look a little something like this.
So your marker's set for your beatpoint, now you gotta apply motion. Right click on the clip you're going to edit and go to video options/motion.
This is the motion mapper. It's not too good since it uses all absolute % values for effect timing, but it gets the job done without having to shell out the cash for After Effects. Plus you don't have to waste your time with inserting 5,000 different trials of pre-renders from after effects. If you don't like it, change the timing right from Premiere. But enough of my rambling...
If this is the first time you've ever opened the motion menu then there will be a video playing in the upper left hand corner. Pause that, it's just going to get in the way later. you'll notice that in addition to your timline marker line, a second line will appear. This is the motion mapper's own little marker and it's purpose is to show you where on your master timeline, the marker is in the motion mapper's mini timeline (relative to the clip) as pointed to by what I'll be calling the tracker marker. I don't know why, but I like the sound of it, and this is my guide so ha.
Lost yet? I hope not. Every new motion mapped object has two keyframes, the start, and the end. They show up on the motion map timeline as vertical lines. The first keyframe is already selected (you can tell because there's an arrow above it). Click the "CENTER" button to assign your video a position on screen at this keyframe as center (by default the motion mapper scrolls the video left to right). Click on the end keyframe and do the same thing. Now your video is centered throughout the duration of the motion, unless of course you change it.
Now you have to create a keyframe at the point which you marked on your master timeline by leaving the tracker there. Click anywhere directly underneath the motion map timeline and you'll see an arrow will follow your mouse wherever you drag it. You'll also notice the tracker marker for the motion map timeline, is moving in the main timeline also. drag around until BOTH lines disappear. This means that they're overlapping. Now on the motion map timeline, click right on the line where your new arrow is pointing.
Now before you set a value, create the ending keyframe. This will make your job easier in the end. In this current video, I've got a fast bounce going on, so I want it to take only 3 frames to return to normal. So click under the motion map timeline again and watch the tracker marker in the master timeline window move 3 frames. It's not a smooth movement, so you can count 3 "clicks" worth of movement. Click on the motion map timeline again to create an ending keyframe.
Almost done. Now if you want your clip to start at 100%, gradually zoom in, and then falloff sharp for 3 frames, then you can ignore this, and in case you didn't know, I'm being sarcastic.
Click anywhere between the start of the motion map timeline, and the first keyframe you made to create another keyframe. Where you create this keyframe is irrelevent so long as it falls between those two points. Drag that keyframe RIGHT UP AGAINST the first keyframe you made. This ensures that your video is zoomed at 100% until the last possible moment, and then will jump up and then zoom back out for 3 frames.
Got a bunch of keyframes, but don't know what to do with them? Relax, we're almost done. Click on the first keyframe you made and in the settings dialogue near the bottom of the window, set the zoom to something obvious, but not extreme. I tend to use 300%. Now click OK. Render your timeline and you're set. If you did it right, it should look like the clip at the URL at the bottom of this post. If you screwed up, crack open the manual, because I really can't be more clear than this ^.~
Demo
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http://stompbox.dhs.org/~Evangelion/bou ... bounce.mpg
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