Why can't i speed up my clip?

Basically i have imported a clip recorded from my XBOX 360 using a Happauge HDPVR 2. I've used Quicktime Real player to trim my clip and in a .MP4 format. I then imported it into iMovie, but now i can't speed up my clip? I get the option of speeding/slowing the clip, but the speeds are greyed out and cannot select them. I dont know what to do? The clip is around 60 seconds long.
Thanks

Hello roblane96,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
iMovie '11: Slow down or speed up video
http://support.apple.com/kb/PH2239
Best of luck,
Mario

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Looking at the article you linked, this is all it actually says about video speed:
You can change speed on videos and even do picture-in-picture on iOS devices. The changing speed setting is great for iPhone 5s who can record slo-mo video at 120 frames per second.
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I had this problem also, only the .m4v files could not be imported either! The strange thing was I was able to do this task with other home vids in the past without issue. I simply shut everything down and rebooted at this point as a last dithch effort to avoid a trip to the Apple store and then it worked - itunes was able to accept the import.

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Hi Sammusik,
Several things can affect the playback speed of an added clip, such as automatically adjusting the speed of the clip to match the framerate of the rest of the project. For more information on this and manually adjusting the playback speed, you may find the following article helpful:
iMovie (2013): Slow down and speed up clips
Regards,
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Sorry for any inconvenience; I'm new to the discussion process. And sorry for the delay in responding; I've been away and unable to follow through.
I'm still having the same problem.
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The only other devices on the firewire bus are firewire hard drives -- essential to the operation.
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gbrmk
Did you find the Delete Audio and Delete Video commands?
If yes, please disregard.
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Thanks.
ATR

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that I guess is the problem
.mp4 is no Video-Codec but a container that can hold ones that iMovie can or cn not use
iMovie is very picky reg Codecs
QuickTime-player can open o many more
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then open the ones that do not work and see what goes for them
then convert them to the Codec and frame rate the works.
Yours Bengt W

Remote location, 7kbs d'load speed, 10 days to d'load Lion, only software updates are through the App Store. Why can't we d'load and install outside the Cloud anymore? Some of us can't use the cloud.

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I'm new.
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Why can't i speed up my clip?

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