try placing the 2nd clip in its own layer then nesting the clip and see if that works.
If you put it in its own layer how do you do cross dissolves and other transitions from the previous clip which is in a different layer?
Stuttering is usually an indication that one or more of the system components have a hard time keeping up with the data that need to be processed. Often it is CPU, memory or hard disk related.
It has nothing to do with resources. If you place 2 clips in the timeline next to one another, from the same original source clip, with no effects or anything, it stutters badly. It is not in any way related to the performance of the system as far as I can determine as putting much more complicated effects in the same clips in the same project work fine, as long as the clips from the same source clip are not next to one another in the timeline.
It works here without any problem, even with 30 instances of the same AVCHD clip in a timeline.
I agree with Harm that something is wrong.
Try putting both clips in nests.
Also have you tried using the razor and cutting just the parts you want.
Just trying to thing outside the box.
Its not supposed to be acting like that.
Also is it any footage that is repeated this happens or only one type ?
Does it do it with all video ?
Are you using avchd with cross dissolves? If so, its a known issue.
Workaround: Open Explorer and duplicate the clip you want to use twice.
Import this duplicated clip and use that for the 'second' clip.
Bingo! I use AVCHD exclusively (1920x1080/60i) and I cross dissolve between scenes a lot, and in the case where I am "cutting out the middle" I always cross dissolve.
Thanks for the workaround.
This holds true for Canon Dslr Footage as well. I have been having the same issue and couldn't figure out why some clips stutter with a disolve and others don't so when I saw this I tried this workaround and Bingo. It worked.