John Kork wrote:
Sorry, I now this is not the right place....
but It seems I can not mark frames withinh a clip to trim them.....
Trimming does not seem to be working as imovie 9 did....
Unlike iMovie '11 (version 9.0.9), the new iMovie 10 allows the importing and native editing of AVCHD clips from the camera without the need to convert them to an intermediate codec. iMovie '11 converts clips to Apple Intermediate Codec. Possibly other compressed formats can also be imported without the need for conversion.
AVCHD is a highly compressed format that doesn't compress each frame individually (unlike, say, DV from tape based camcorders). It uses intermittent reference frames followed by instructions that record changes to the reference frame, such as the movement of objects and colour changes etc. The intermediate codec converts the compressed data into individual full frames, allowing editing down to the actual frame level (as applied in iMovie '11).
In iMovie 10, it appears that editing can only be performed to tenths of a second, not frames (given that iMovie is working with the native AVCHD compressed media). Note that all of this is just my explanation from a layman's perspective! You will notice that when dragging clip ends, the indicator above the skimmer arrows shows movements in increments of tenths of a second (not frames).
You can split clips and then remove segments from the project timeline. Right-click (or control-click) at the point where you which to split a clip, then select Split Clip from the pop-up menu. Now you can drag the separated clip ends inwards to remove a segment. Alternatively, you can drag across a segment so that it is highlighted with a yellow border, then select Edit > Delete from the menu - that action will split the clip in two places and remove the highlighted section. You can also trim clips by clicking on Trim to Playhead from the pop-up menu. (I'll give you a link to all of this at the end of my post).
I appreciate that this won't give you frame accurate edits, as in iMovie '11, but so far I haven't missed this feature. iMovie '11 has a nice feature that allows easy trimming (of up to one second at a time) by utilising a trimming tool that appears at clip ends when the skimmer is hovered over the clip end. I used to use this quite a lot, as it allowed trimming to the frame level. If I really need frame accurate editing, I now use Final Cut Pro X (although of course I still have access to iMovie '11 if needed).
Here's a link to the Apple iMovie Help topic for "Trim, Split and Move Clips":
http://help.apple.com/imovie/mac/10.0/#movf8b8fc9b2
Hope this helps John. Sorry if I've misunderstood your question or gotten off track (or explained things you already know)!
John