FCP clip time remapping / speed ramping question re realtime after changes?

Hello All,
My first post here! I tried searches for this topic but didn't find....
I wasted hours today messing with the keyframe editor to try and ramp parts of a single clip... first time using this feature and couldn't follow the manual! way too difficult to grasp without fluency in 'techygeekconfusic' lingo. Anyway, I don't think the topic was covered from what I read in my version of the manual.
So I went straight for the keyframe editor graphic display under the clip in timeframe and put in a few points with the pen tool (using time graph blue line) and seemed to be going great until I realised that the segments in the single clip (ten minutes long) that I was adjusting were affecting what came after - ie slowing down the remainder of the clip. And that was all I could get from my manual that this happened without any explanation about stopping it happen by letting the outpoint of the clip readjust automatically for the changes made to that part of clip so that altered clip would be shorter in timeline...
I then tried again from the start but noting the minus time on pentool arrow when I slid each keyframe point back and subtracting it from the duration in motion tab and that seemed to work for a while...
but God bless my little brain! what I really wanted to happen - for the blasted thing to readjust itself automatically after I had adjusted a segment of the clip so that the remaining non-adjusted part would play in realtime with a new shorter outpoint in the sequence timeline - just couldn't be realised in my little brain or in the 'user friendly' control panels of FCP.
I tried to get hold of the 'bezier' point at the end of clip and drag forward at the same rate as each change but could'nt get hold of it! I tried to put two points with pen tool at same time but couldn't isolate them from one another to create four points for adjustment without having still frames between.. blah blah.. I tried to get snapping to the pen tool points for further control but couldn't... duh!
Please! how do you do it! obviously I have limited intelligence but I need to do this now. I want to adjust the 10 minute clip (DVCproHD 720p24N format - not that this should matter as my sequence settings are same) adjust the clip at maybe 10 different places so that it ramps in speed to cover up some boring areas and then back to normal speed after the changes - not back to some slo mo **! speed.
I tried cutting with the razor tool to isolate and that didn't work either and other analogue brain type stuff ok I know you are laughing at me now but please help?!! I'm pretty new to this stuff, give me the old reliable Steenbeck and a few real bins and strips of film hanging on clothes pegs and I'll be ok...
Help will be most gratefully appreciated!!!!!!!!
Barra
Message was edited by: BarraAppleId

Andy did a very good job explaining the underlying problem with the time remap tool.
The key thing to remember is the first and last frame are fixed in time. If you speed up the clip, time after that keyframe will have to slow down to compensate. Imagine the clip is a rubber band that has been cut so that it is a long string-like form. Now imagine anchoring each end of it with a push pin to a board. If you grab a point on the band and pull it toward one of the pins, the part of the band on the side you are pulling away from the anchor will stretch (run slower) and the side you are pulling toward will bunch up (run faster). But, when all is done, the start and end will still be at the fixed points.
The way I've worked through this is to make a general guesstimate of how long the clip will be once all the ramping is complete. For example, I want the clip to start at normal (100%) speed and ramp up to 300% and back down to 100%. I might start with a clip having a constant speed of 200% and then change it to variable and play with it. The key concept is if you can get the overall LENGTH to where it should be, the rest works out fine.
I have repeatedly asked in the FEEDBACK/New Features page that they add a toggle to the speed/time remap tools. This toggle should allow you decide whether the playback TIME for the clip should be fixed or flexible.
For example, if you were working with a 4 second clip and wish to slow it down by 50% -
If 'Maintain Time' is toggled ON, when you decrease the speed of clip by 50% - the clip will still play for 4 sec (but will show only half the total frames).
If the toggle is OFF, the 4 sec clip will now play for 8 sec and will display all the frames.
Where this concept becomes really powerful is when it's applied to time remap. If you have 'Maintain time' toggled OFF, as you adjust speed, the end point of the clip will float in time. If you increase the speed, the overall time of the clip will shrink. If you slow it down, the end point moves out in time.
We need to keep asking ...
x

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NumGLGPUs=1
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glgpu[0].GLVersion="3.0"
glgpu[0].GLMemoryMB=2048
glgpu[0].GLName="GeForce GT 640/PCIe/SSE2"
glgpu[0].GLVendor="NVIDIA Corporation"
glgpu[0].GLVendorID=4318
glgpu[0].GLDriverVersion="9.18.13.5012"
glgpu[0].GLRectTextureSize=16384
glgpu[0].GLRenderer="GeForce GT 640/PCIe/SSE2"
glgpu[0].GLRendererID=4033
glgpu[0].HasGLNPOTSupport=1
glgpu[0].GLDriver="nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um"
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glgpu[0].glGetIntegerv[GL_MAX_TEXTURE_UNITS]=[4]
glgpu[0].glGetIntegerv[GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS]=[192]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS]=[32]
glgpu[0].glGetIntegerv[GL_MAX_TEXTURE_IMAGE_UNITS]=[32]
glgpu[0].glGetIntegerv[GL_MAX_DRAW_BUFFERS]=[8]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_UNIFORM_COMPONENTS]=[4096]
glgpu[0].glGetIntegerv[GL_MAX_FRAGMENT_UNIFORM_COMPONENTS]=[2048]
glgpu[0].glGetIntegerv[GL_MAX_VARYING_FLOATS]=[124]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_ATTRIBS]=[16]
glgpu[0].extension[AIF::OGL::GL_ARB_VERTEX_PROGRAM]=1
glgpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_PROGRAM]=1
glgpu[0].extension[AIF::OGL::GL_ARB_VERTEX_SHADER]=1
glgpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_SHADER]=1
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glgpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_RECTANGLE]=1
glgpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_FLOAT]=1
glgpu[0].extension[AIF::OGL::GL_ARB_OCCLUSION_QUERY]=1
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glgpu[0].extension[AIF::OGL::GL_ARB_SHADER_TEXTURE_LOD]=1
clgpu[0].CLPlatformVersion="1.2"
clgpu[0].CLDeviceVersion="1.2 CUDA"
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clgpu[0].CLName="GeForce GT 640"
clgpu[0].CLVendor="NVIDIA Corporation"
clgpu[0].CLVendorID=4318
clgpu[0].CLDriverVersion="350.12"
clgpu[0].CUDASupported=1
clgpu[0].CUDAVersion="7.0.0"
clgpu[0].CLBandwidth=2.58495e+010
clgpu[0].CLCompute=181.438
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