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Figuring out the timing of effects

Posted: Tue, 12th May 2009, 5:50pm

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richardray

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Every time I render something the effect I've made happens in like 2 seconds! I spend an hour on an effect and it looks great frame by frame, but then I render it and it speeds by in 3 seconds. When I preview render, it still jumps from every few frames (I'm pretty sure its my computer) but looks fine and then I render it and my effect happens so fast it turns out really cheezy. I need to figure out how many frames would equal a second and how many frames an effect should be to turn out realistic. Maybe this is a dumb question but I need help! haha

If it helps, I am trying to make an effect like the "smoke demon" coming from the mouth like you'd see on the tv show "SUPERNATURAL". And I could also use help on blacking out the eyes realistically. Ive been using an inverted mask for a grade object but then I can't see exactly what I'm doing because the huge red screen overpowers my shot.

(I rambled but if this made any sense to anyone who could help let me know! THANKS!)
Posted: Tue, 12th May 2009, 6:06pm

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Axeman

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The framerate is something you set when you create the project, based on the footage you are working with. Typical framerates are 30 fps (USA) and 25 fps (Europe). To further confuse things though, most video footage is interlaced, so there are two fields per frame, and in an interlaced project, each of the 'frames' on the timeline is actually a field, so there are 60 per second (or 50 in Europe).
Posted: Tue, 12th May 2009, 9:41pm

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richardray

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okay so when I open footage, what happens for "progressive" and "deinterlace"? Does it change the 'fields' per frame? and is it a better idea to HAVE two fields per frame or could i stick with 30 fps? and if i were to have 30 fps instead of 60, would my effects look fake?
Posted: Tue, 12th May 2009, 9:57pm

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Axeman

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Its nothing to do with the effects, and its not really a choice, its dependent on the format of your footage. If your footage is interlaced (nearly all video footage is), then you need 60 fields per frame. If its progressive, then you need 30 fields per frame, but the number of camcorders that can record in progressive is pretty small. You need to determine what the format of your camcorder's footage is, then use those settings when you create a project. The documentation for the camera should have that info.

Selecting "Deinterlace" when you create a project will convert footage from 60 fields per second to 30 frames per second, but it does that by throwing out half of the data from your footage, and therefore significantly affects the quality. If you need to de-interlace, it should be done as the last step of the project, after all effects work, editing, and compositing is completed, to retain the best quality possible.
Posted: Tue, 12th May 2009, 10:41pm

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richardray

Force: 800 | Joined: 21st Sep 2008 | Posts: 5

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okay, i guess i'll just have to keep playing around with it and i'll eventually get it. thanks for the help axeman!
Posted: Wed, 13th May 2009, 8:17am

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Simon K Jones

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Just to clarify the interlacing issue a bit, as this is probably why your effects are zipping by so fast:

If you are using video with a framerate of 30fps which is interlaced, it means that on the EffectsLab timeline those 30 frames will actually be displayed as 60 individual fields.

Let's say you want an effect to last 1 second, for example. 1 second = 30 frames. But we're dealing with the individual fields here, so you need to make sure you make it last 60 fields on the timeline. If you only have it last 30 fields, when the fields are recombined into the interlaced frames the effect will actually only last HALF a second.

Hope that makes sense.