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Looping footage

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Nick ChambersLooping footage
by on Mar 31, 2011 at 4:15:55 pm

Hey I was wondering if someone has a technique to looping stock footage.

Such as Fire as it's fairly speratic I was wondering how you would go about looping the footage so it looked seamless?


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Joey ForemanRe: Looping footage
by on Mar 31, 2011 at 4:45:29 pm

You can loop a footage item with the Interpret Footage dialogue in the Project Panel.

If it's stock footage, though, it probably won't loop seamlessly. You can try setting your in point for the layer in the middle somewhere, duplicate the layer and position the duplicate down in the timeline, dragging out the layer handle back to the original in point, then cross dissolve the end of the top layer to the beginning of the lower one. Then set the end point of the bottom layer to be one frame before the in point of the top layer.
Now render this out, re-import it, and set it to loop as many times as you want.

Joey Foreman
Editor/Compositor/VFX Artist


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Nick ChambersRe: Looping footage
by on Apr 1, 2011 at 9:43:36 am

Hey Joey,

How do you loop the footage after I have done what you said?

In the instance I have not rendered it and just need that one layer to loop on itself.

Cheers for your help dude


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Joey ForemanRe: Looping footage
by on Apr 1, 2011 at 1:03:06 pm

In the Project Panel, control-click on the file and choose Interpret Footage > Main...

At the bottom of this dialog you can set the number of loops.

Joey Foreman
Editor/Compositor/VFX Artist


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Michael SzalapskiRe: Looping footage
by on Mar 31, 2011 at 4:46:22 pm

Split it in the middle.
Move the two layers so that the split is at the beginning and end and crossfade the middle bits together.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Nick ChambersRe: Looping footage
by on Mar 31, 2011 at 4:58:10 pm

Thanks Michael,

That sounds like a great idea. Would you just split the one line of footage or just dupicate the footage layer and cut it?

If you're just split one layer of footage, how would you go about doing that?


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Joey ForemanRe: Looping footage
by on Mar 31, 2011 at 5:19:50 pm

Don't mind me. Just maundering in the corner.

Joey Foreman
Editor/Compositor/VFX Artist


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Nick ChambersRe: Looping footage
by on Mar 31, 2011 at 5:21:28 pm

Sorry Joey your idea is very good too. I think I had a go at it earlier but didn't get the detial I wanted.

Although you explained it with more detail. So I will try that too.

:)


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Michael SzalapskiRe: Looping footage
by on Mar 31, 2011 at 7:32:46 pm

Ctrl+Shift+D (CMD+Shift+D on a Mac - I think) will split your footage which is the same as duplicating it and then cutting it at the ends. It's a faster way to do the same thing.

Also, Joey said basically the same thing I did. I just took a while to get around to the tab your question was on and Joey had submitted his answer before I got around to submitting mine :)

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Nick ChambersRe: Looping footage
by on Mar 31, 2011 at 8:33:24 pm

Alright so this going to sound incredibly stupid but given i don't use After Fx I thought I'd ask.

How do you crossfade?


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Walter SoykaRe: Looping footage
by on Mar 31, 2011 at 9:10:01 pm

You add opacity keyframes -- one at 100%, then another some time later at 0%.

Since you're new to After Effects, I'd recommend the following link, in which Adobe's Todd Kopriva pulls together some important introductory materials:

http://blogs.adobe.com/toddkopriva/2010/01/getting-started-with-after-eff.h...

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Ashish VargheseRe: Looping footage
by on Mar 31, 2011 at 8:37:57 pm

What's the expression for looping?


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Walter SoykaRe: Looping footage
by on Mar 31, 2011 at 9:16:21 pm

[Ashish Varghese] "What's the expression for looping?"

loopOut();

Possible parameters are cycle, pingpong, offset, and continue.

See the official documentation here [link], or see Todd Kopriva's blog post loopOut and loopIn expression methods [link] (An infomographic is worth a gazillion words) for a visual example.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Gaz EvansRe: Looping footage
by on Apr 1, 2011 at 9:03:45 am

whoops wrong thread


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Ben MettlerRe: Looping footage
by on Apr 13, 2011 at 4:39:33 pm

I still don't understand this process. I don't know how you're suppose to get the beginning and the end to be the same by just cutting the footage? Maybe someone can be more specific. I'll attach an image of my comp.

Thanks!



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Nick ChambersRe: Looping footage
by on Apr 13, 2011 at 5:02:30 pm

Ironic how I originally asked the question...

Say you need a 10 second loop, right.

Start with 6 seconds of footage that you want to loop.
Duplicate it, move the timeline to the middle of the footage.
Cut the top layer Alt + ]
Zoom into the middle and check that the timeline matches and cut the bottom layer Alt + [. *After FX doesn't seem to do this seemlessly if you're soomed out.
Move the top to the end and the bottom layer to the beginning.
Go to your comp settings and change the duration to 10:01
Then drag the same original footage into the comp and key frame the opacity to fade in and out. Crossfading :)
I also apply and easy ease to my key frames so it isn't as jerky on transition.

Does that help


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Joey ForemanRe: Looping footage
by on Apr 13, 2011 at 5:18:40 pm

1. Move the CTI (Playhead) to the middle of the Layer.
2. Split the layer.
3. Move the layer that's the 2nd half to the beginning of the timeline.
4. Move the layer that was the first half down in the timeline so that its beginning overlaps the end of the 1st half layer by about a second or so, and position it above the other layer if necessary.
5. Set an Opacity keyframe with a value of 0 on the first frame of this layer (where the overlap begins). Set a 2nd Opacity keyframe with a value of 100 on the last frame that overlaps the layer below.
6. Move the end of the Work Area back to 1 frame before the last frame of the lower layer.
7. Set the RAM Preview to Loop and do a preview. This lets you test the crossfade duration to see if you like the look. You might want to make it shorter or longer. It also lets you confirm that the loop is seemless at the end. When you're satisfied...
8. Render the comp, Work Area only.
9. Import your rendered file.
10. Right-click on the imported file and choose Interpret Footage...Main.
11. In the dialog that opens, set the file to loop as many times as you would like.

Joey Foreman
Editor/Compositor/VFX Artist


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Ben MettlerRe: Looping footage
by on Apr 13, 2011 at 9:44:48 pm

Thanks for the quick responses. I actually found a cool script that does it for you at http://aescripts.com/the-loopmaker/. You can name your own price for the script ;) They have some other pretty cool scripts on the site.


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Joey ForemanRe: Looping footage
by on Apr 13, 2011 at 10:52:05 pm

Good thing I took the time to write out a step-by-step tutorial.

Joey Foreman
Editor/Compositor/VFX Artist


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Jenny ConwayRe: Looping footage
by on Apr 14, 2011 at 9:09:23 pm

Don't worry, your step-by-step is incredibly helpful! Won't go to waste here. Thanks!


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