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grade filters within one grade object [ANSWER]

Posted: Fri, 20th Jun 2008, 12:08am

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1luckydog

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I wanted to keep a record of the different grade effects within a movie file as I am going through the manual. I added a twirl effect at frame 30, then I added a blur effect at frame 50. It seems the effects are added together whether then separate. I know how to change the length of the effects and can move them along the time line but I'm not sure how to add new effects (or modified effect) that take place at different frames. (say frames 1-60 are graded, go back to the normal scene until frame 120 and add new effect).

How is this done?

thx
Posted: Fri, 20th Jun 2008, 12:18am

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Plainly

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1luckydog wrote:

I added a twirl effect at frame 30, then I added a blur effect at frame 50. It seems the effects are added together whether then separate.
Yeah, that's because the effects always start at the beginning of the clip, no matter when you put them in there.

What you need to do is work with keyframes. If you want your blur effect you appear on frame 50, then set it to the strength you want on that particular frame; then, go one frame back, thus bringing you to the 49th, and slide back the blur's strength to 0. This will do that the blur, up to frame 49, has 0 strength - it is invisible - whilst at frame 50, it will have the exact strength you firstly indicated.

I hope this answers your question! razz

Plainly
Posted: Fri, 20th Jun 2008, 4:18pm

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1luckydog

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Thanks for letting me know whats happening. I was able to see you point. I set 1 effect at frame 30. I skipped to frame 50. The effect was immediately picked up in the beginning frames. If I moved frame 50 any where on the the same object line the effects where the same - cumulative (of course this could be what one wants to see)

I did follow your suggestion and on the 2nd effect on frame 50 I had a high option setting. I went to frame 49 and set the option to low. What I got was that it was the first option (low) that was adding to the cumulative effects not the high option. When I moved the high optioned keyframe to 49 it was this option that was added to the cumulative effects. Seems the first keyframe of the same effect takes precedent. I did this with a new effect keyframe at 70 and it was the same. This is OK now that I know whats going on.

What I did find out was that if I wanted to go to an effect for x frames, go to x frames with no effects and at x frame add a totally new effect I needed to add another Grade Object. This works for me because I can now rename each object and then collapse them so that I distinguish each while I'm going through the manual and the timeline is not crowded.

Thanks again.
Posted: Fri, 20th Jun 2008, 5:59pm

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1luckydog

Force: 1000 | Joined: 12th Apr 2008 | Posts: 8

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Ok I' changing my story from my last comment:

"When I moved the high optioned keyframe to 49 it was this option that was added to the cumulative effects. Seems the first keyframe of the same effect takes precedent. I did this with a new effect keyframe at 70 and it was the same. This is OK now that I know whats going on."

I went back to review the effect and I did see the changes for each keyframe when the option was changed on that object line. It depends on how much of a change is made and how keen a eye you have to see the change. Sorry for the confusion.
Posted: Mon, 23rd Jun 2008, 5:21am

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Axeman

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Grading filters by default, as you have discovered, apply to an entire clip. The easiest way to abruptly switch from one to another is probably just to cut the footage where you want each filter to start and stop.

You can also use 2 keyframes back to back to make an abrupt change. If you set a keyframe to 0 at frame 49, then set it to 100 at frame 50, the effect would instantly come on full force at frame 50. then, if you set a keyframe at 100 at frame 70, and 0 again at frame 71, the effect would abruptly turn off. The 0 keyframes at either end will prevent any other portion of the footage from being affected by that filter.