Timewarp, Fit To Fill, and Avid Media Composer’s other time manipulation tools pale in comparison to the simplicity of the Trim To Fill Effect. Trim To Fill is hands down the quickest and easiest way to speed up or slow down a clip inside of Avid Media Composer.

For this post we’ll first show you how to use Avid Media Composer’s Trim To Fill Effect. Then we’ll go into some finer details of when and why to use it.


How to use Avid Media Composer’s Trim To Fill Effect

Let’s look at the timeline in the picture below:


Avid Media Composer Timeline


In the scenario we’re going to use what we want to do is take the middle clip on V1 and expand it all the way out to fill the gap between it and the next clip. This will slow the time of the clip down.

To do this, first open up the Effect Palette by hitting Command+8 if you’re on a Mac or Control+8 if you’re on a PC. Navigate to the Timewarp folder on the left column and once selected find the Trim To Fill Effect in the right column.


Avid Media Composer Effect Palette


Drag and drop the Trim To Fill Effect onto the clip you want to adjust. In our scenario, this is that middle clip on V1. Now the fun part!

Go into Trim Mode and roll the clip out or in based on if you want to slow the clip down or speed it up. In our scenario, we’ll roll the clip out so it covers the gap in the track which will slow it down from 100% to 62%.


Avid Media Composer Timeline


Boom. That’s it. If you need to adjust the trim you made just jump back into Trim Mode and make whatever adjustments you need to make. The Trim To Fill Effect will change the speed of the clip as you trim.


When and Why to Use Trim To Fill versus Other Effects

You’ll want to use Trim To Fill whenever you have an area that’s too large or too small for a given clip. Or a clip whose speed you want to adjust but don’t quite know for how long. You’ll probably find it more comfortable to trim a clip rather than jumping into Timewarp’s Motion Effect Editor.


Avid Media Composer Motion Effect Editor


However, you will find that you can still use the Motion Effect Editor on the clip with Trim To Fill applied. It’s kind of the best of both worlds. And if you want to insure a smoother playback you’ll want to go into here and adjust the Type: dropdown from “Duplicated Field” to “FluidMotion” or one of the other options.

To get to the Motion Effect Editor on a clip with Trim To Fill applied to it, put your Time Position Indicator over the clip, make sure the track is selected, and enter Effect Mode. Or you can enter Effect Mode then select the clip. It’s up to you.

Another tool that Avid Media Composer has that is similar to Trim To Fill is Fit To Fill. For Fit To Fill to work you need to set In and Out Points on a clip in the Source Monitor and In and Out Points on the Timeline then hit the Fit To Fill button.


Comman Palette Avid Media Composer


However, the downside of Fit To Fill is that 1) you can’t adjust it without promoting it to a Timewarp Effect and 2) it creates an unnecessary new Master Clip for you to keep track of inside your project.

That’s it! Trim To Fill is the quickest and easiest way you’ll find to do time manipulation in Avid Media Composer.

To recap, find Trim To Fill in the Timewarp folder in the Effect Palette. Drag and drop it onto your clip. Enter Trim Mode and trim the clip to the desired length to speed up or slow down the clip. Enter back into Trim Mode to adjust as needed. And then move onto your next edit!