site_archiver@lists.apple.com Delivered-To: pro-apps-dev@lists.apple.com Thread-index: AcngseATNVbyqqSTNE2ydltk1NAb2w== Thread-topic: FCP and generators: forcing an entire clip to re-render? User-agent: Microsoft-Entourage/12.17.0.090302 We'd like this to0. For instance, in our retiming plugin, it would be nice to "retime to fit"... Which would also necessitate the same feature. Pete

Hi Steve,

There's no way for you to signal that changing your generator's duration invalidates all previously rendered frames. I think we'd need a separate flag for this, since this isn't true for many effects, even the ones that vary over time.

I believe we've had requests for this before, but please feel free to add your voice.

- Paul

On May 29, 2009, at 1:49 PM, Steve Christensen wrote:

...

I have a generator effect that varies over the length of a clip in a way that depends upon the clip length. For example, think of the case where you have a bouncing ball that goes from the left- to the right side of the frame over the course of the clip duration.

If I drag my generator effect to the timeline and configure it, then tell FCP to render the clip, the render happens and the render status line above the clip changes from orange (unlimited) to blue (rendered). When I play back the clip, I see the equivalent of the bouncing ball happily bouncing from the left- to the right side of the frame.

If I then increase the length of the clip, I see the blue line above the previously-rendered section, the orange line above the section just extended. If I "render all," the newly-added section is rendered. If I play back the clip, I see the bouncing ball going from left to right, then in the newly-added section, the ball hops back a bit and then bounces to the right edge.

I'm trying to figure out if I have something set up incorrectly in the plugin or if this is just the way that FCP works. There are only two things I think I have control over, thus those methods are set up as:

- (BOOL) variesOverTime { return YES; }

- (NSDictionary*) properties { return [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES], kFxPropertyKey_SupportsRowBytes, [NSNumber numberWithBool:NO], kFxPropertyKey_SupportsR408, [NSNumber numberWithBool:NO], kFxPropertyKey_SupportsR4fl, [NSNumber numberWithBool:NO], kFxPropertyKey_MayRemapTime, [NSNumber numberWithBool:NO], kFxPropertyKey_PreservesAlpha, [NSNumber numberWithBool:NO], kFxPropertyKey_PixelIndependent, [NSNumber numberWithInt:0], kFxPropertyKey_EquivalentSMPTEWipeCode, nil]; }

Anything else I can fix or am I stuck with this behavior?

steve

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