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Cool light effect
This is pretty slick, and if it was a still image I could figure out how to do it. Anyone have an idea on how this can be accomplished in Vegas? Only thing I could think of was to somehow save each frame of the bike lights and composite layer after layer. The effect starts at about 1:40 in.
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16 Replies
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[Dale Estes] “Anyone have an idea on how this can be accomplished in Vegas?”
Looks to me as if they’d attached a short strip of LEDs to each bike wheel rim. There’s a tiny clue as they start off slowly there’s what appears to be an arc of lights. Doing this in post? Study the way the effect vanishes behind trees. In Post? Rather you than me!
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
[Graham Bernard] “Study the way the effect vanishes behind trees. In Post?”
I woke up this morning and checked the forum. Since that I find me time to time thinking about how this could be done, how I would do if I had to… :)))
The lights on the wheels were real LED lights, that’s sure. This is the whole video is about.
But what the OP is asking, is that kind of motion trail those lights draw.
The best I thought would work until now is that freeze frame every frame of the video where the bike passes.
Darken it, so that it becomes black, only the lights on the wheels remain visible.
And add it above the original video with “ADD” compositing mode.
For this I’d need so many tracks, how many frames the event has.
Huge lot of “manual” work, but I feel it’s doable. However, I’m sure there are other methods…
So if someone knows how to properly do a motion trailing in Vegas, knows the answer for this problem.
A special effect somewhere, Boris, Newblue packs maybe? (I don’t use these, so I don’t know).
But am still thinking…. 😉Best regards
László Kovács
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[László Kovács] “But what the OP is asking, is that kind of motion trail those lights draw.”
How do you know this? I read this:
[Dale Estes] “This is pretty slick, and if it was a still image I could figure out how to do it.”
That didn’t indicate “Motion”?
If this IS the case – hope the OP gets back and clarifies – then I would explore prearranging two tracks that created MASKS of those two separate colours, apply motion blur – Vegas has this – and eventually render back a 2-Colour Transparent BG render which would marry with the original footage. Simple!
Actually I do have a mass of Plugs, not Boris, that may well utilize Motion Blurring based on preselected Chroma. Further thinking about this as the colours are really dominant, maybe even Luminosity. Interesting . . . .
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
Hi,
[Graham Bernard] “That didn’t indicate “Motion”?”
[Dale Estes] “… if it was a still image …
If it ‘s not a still image, isn’t it a motion picture then?
But you’re right, I should have written : “I think”.
I apologise.Nice idea with the masks!!!
But how long trail would that draw using Vegas motion blur?
Now I’m thinking about rendering the bike-pass event as series of PNG’s.
All that tweaked, so basically all frames show just the lights.
So say, Frame[0] is complete black, Frame[1] is the first frame of the event, where the lights are only visible.
Then Frame[N] is the last frame, where the bike already passed.
Cumulate these, so:
Frame[1] = Frame[0] + Frame[1]; //which is equeal to Frame[1] because Frame[0] doesn’t add anything being completely black.
Frame[2] = Frame[1] + Frame[2];
Frame[3] = Frame[2] //which is already 2+1// + Frame[3];
and so on.
Frame[N] = Frame[N] + Frame[N-1].
So at the end Frame[N] cumulates all the previous frames from 1..N; so the trail is drawn ?
Maybe Photoshop can be automated to do this (via batch processing), then import back those frames to Vegas, and use those as masking the solid color layer???Best regards
László Kovács
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[Graham Bernard] ” [László Kovács] “But what the OP is asking, is that kind of motion trail those lights draw.”
How do you know this? I read this:
[Dale Estes] “This is pretty slick, and if it was a still image I could figure out how to do it.”
That didn’t indicate “Motion”?”
Yes, that is what I was trying to say. The LED part was easy enough, I was wondering about the light trails part of it. I’ve been a photographer for 30 some years and creating this effect in a still image is fairly easy.
I’m still relatively new to video and adding the motion part to the scene is what has me baffled. I’m sure there’s quite a bit of compositing going on, but how is he saving the light trails in the first place. My initial thoughts were about the same as Laszlo’s, lots of tracks composited together. The separate frames idea sounds interesting also, but a huge amount of work. I didn’t know about the motion blur, I’ll have to look at that. Some interesting ideas.
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Well, I WAS wrong!
OK, Light Trails and Motion Blur not the same in Video. You’re gonna need to separate out the item you want to appear as a solid – and yes that WOULD be a Motion Blur. Light Trials are where you leave the Shutter open long enough to capture movement that is SET IN TIME AND SPACE. Do this with Moving objects and ALL the movement, including the dark bikes would be blurred. Yes?
I have never done this, but I have isolated Colours to make Masks and I have Motion Blurred moving Masks bvut I haven’t combined these two vectors/controls.
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
I emailed the creator of the video and let him know of this discussion, hopefully he will join this conversation and enlighten us as to how he created the effect.
James Ollick
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Now THAT’S smart thinking!
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
I had asked the same question directly in his video comments. I don’t think he wants to reveal his “secret” just yet. He’s inviting guesses for now.
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Hmm, oh well let’s see – eh?
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge
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