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Understanding trim concepts

From: Avid Media Composer 5 Getting Started

Video: Understanding trim concepts

Once we put clips together and view them in a sequence, just a few frames here and there can make a dramatic difference to rhythm, pace, and meaning. Trimming allows us to make finer modifications to the precise beginning and endpoints of clips directly in the timeline. Here, I've got a sequence loaded up in my Timeline window. See I have got a valley clip here, followed by a section of black, and then a bunch of other clips making up my river valley sequence.

Understanding trim concepts

Once we put clips together and view them in a sequence, just a few frames here and there can make a dramatic difference to rhythm, pace, and meaning. Trimming allows us to make finer modifications to the precise beginning and endpoints of clips directly in the timeline. Here, I've got a sequence loaded up in my Timeline window. See I have got a valley clip here, followed by a section of black, and then a bunch of other clips making up my river valley sequence.

Let's say we wanted to extend the end of the valley clip. First off, I need to come over here to my Timeline palette and select one of my Trim tools: either Ripple Trim or Overwrite Trim. I am going to select the red one, called Overwrite Trim. Now, as I approach the transition point, you see some different icons that we haven't seen before. Ignore the red ones, and just concentrate on the white one for a moment. It has a double roller, meaning that when I click down once in the timeline and activate Trim mode, you can see now there is a roller on the outgoing side of the transition and a roller on the incoming side of the transition.

That means when I trim this edit point, I will be adding and removing frames from both sides of the trim in equal amounts. If I click down now, hold, and drag to the right, I am adding material to the out going side of the valley clip, and I am removing material from the black here in the timeline. You can see I added 20 frames to the outgoing side, and I removed 20 frames of the black. This is the Trim interface up here by the way.

Now we are in Trim mode. This viewer displays the outgoing side of my edit, and this viewer displays the incoming side of my edit. I also have these little tools here, which allow me to fine-tune my trim point backwards and forwards by a single frame, or 10 frames at a time. If I click down and drag left, now I am removing material from the valley and adding more black into my sequence. Now if I click down again and drag to the right, but just keep going, eventually I am going to run out of material.

There is just no more of the valley clip to trim into my sequence. That's what that red bracket means, in the bottom right-hand corner of the left-hand viewer. Let's look at a different example of a dual roller trim. Let's come over here to the transition point between the sky and the rushing water. This time, single-click here instead. Instead of having black on one side of my trim, I've got a clip on both sides. I've got the sky outgoing and the river incoming.

This time if I click down and hold and drag to the left, I'm removing material from the end of the sky clip and adding material to the water clip. Likewise, if I click down and hold and drag to the right, now I'm removing material from the rushing water and adding to the sky clip. If I drag and keep dragging to the left, I've hit that red bracket again. What does that mean? It simply means that there is no more material at the beginning of the rushing water clip to trim into.

Let's have a look at one final example. If I click here in the transition between the water and the sky, and I hold down and drag to the left until there is no more of the water clip left, look what happens. I get that red bracket again. It doesn't mean, in this particular case, there is no more of the sky clip; what it means is I've removed an entire event from my timeline. So Media Composer stops me so I can recognize that fact. If I want to continue to add material to the beginning of the sky clip, all I need to do is click down to re-engage and continue to drag to the left.

This time, I really have run out of material. Again, I see the red bracket, this time in the bottom-left corner of the right-hand viewer. If I want to exit Trim mode, I can either hit the Source Record Mode button here or tap my cursor in the Timeline ribbon at the bottom, and now I've exit back to Source Record mode. Trimming is simply part of the editing workflow. We start the process by adding, removing, and reordering clips in our sequence.

Then we move onto the fine-tuning stage where Overwrite Trim and Trim Ripple are essential tools.

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This video is part of

Image for Avid Media Composer 5 Getting Started
Avid Media Composer 5 Getting Started

36 video lessons · 6036 viewers

Steve Holyhead
Author

 
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  1. 4m 13s
    1. Welcome
      1m 31s
    2. Using the exercise files
      2m 42s
  2. 21m 40s
    1. Starting Media Composer and creating a new project
      4m 15s
    2. Understanding Media Composer
      5m 47s
    3. Working with clips, bins, folders, and the Project window
      3m 44s
    4. Saving and backing up your work
      4m 16s
    5. Retrieving a project from the Attic
      3m 38s
  3. 27m 58s
    1. Understanding media formats and the Format tab
      8m 25s
    2. Importing media
      6m 11s
    3. Linking to media using AMA
      5m 43s
    4. Accessing media from other projects
      2m 56s
    5. Working with clips in the bin
      4m 43s
  4. 23m 49s
    1. Getting started with editing
      7m 25s
    2. Creating a new sequence
      5m 39s
    3. Removing material from your sequence
      6m 20s
    4. Editing segments in the Timeline
      4m 25s
  5. 30m 44s
    1. Using Splice, Overwrite, and three-point editing
      5m 25s
    2. Understanding trim concepts
      4m 39s
    3. Working with trim techniques
      6m 6s
    4. Using the Timeline
      7m 49s
    5. Building multitrack sequences
      6m 45s
  6. 14m 21s
    1. Adjusting audio levels and pan
      6m 42s
    2. Diving deeper into audio
      7m 39s
  7. 23m 8s
    1. Setting quick transitions
      5m 33s
    2. Working in the Effects palette
      3m 42s
    3. Keyframing effects
      7m 1s
    4. Setting system performance and rendering effects
      6m 52s
  8. 17m 37s
    1. Creating freeze-frames and motion clips
      4m 40s
    2. Understanding timewarp effects
      7m 15s
    3. Understanding Timeline compositing
      5m 42s
  9. 19m 44s
    1. Working with basic color correction
      7m 13s
    2. Stabilizing shaky footage
      1m 44s
    3. Creating a basic title
      5m 0s
    4. Mixing down video and audio
      5m 47s
  10. 6m 33s
    1. Building the final output
      6m 33s
  11. 18s
    1. Goodbye
      18s

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