Join Maxim Jago for an in-depth discussion in this video Expert render, part of Media Composer 8.7 Essential Training: 110.
- [Instructor] If you're working with multiple layers of media on the timeline, with multiple effects, and the timeline's dropping frames during playback, you're probably going to want to render. But, you're going to want to render as little as possible, if you're just trying to get a preview at full frame rate. One way of achieving this, is to select all of your tracks, and go to the Timeline menu. And instead of choosing Render, and Render at Position, which will just render all of the effects, and it'll definitely give you realtime playback, but you might be rendering effects that are not required for that realtime playback.
You can choose Expert Render instead. And if you have in and out marks, you can apply an Expert Render to just a region of the timeline. Expert Render looks at your stack of effects, and identifies what needs to render, to give you full frame playback, and what can be allowed to run in realtime, to still give you that playback performance. The question is, whether the Expert Render feature in Media Composer is going to do a very good job of identifying what needs to be rendered. So here I've chosen Render at Position, and the Expert Render dialogue has come up saying one effect out of six needs to render.
It's six, because we can see there's six segments here, each with effects applied. I'm going to say OK, and we can see the green dots disappeared from that clip at the top of the stack, and if scrub through this section, we can see we've got good playback performance. No problem there with dropped frames. But, of course, these clips underneath have not been rendered. So let's roll back a little bit, and play, and see what the performance is like.
Definitely dropping some frames. And if I play it from here, looks pretty good. Now, I'm going to Mark an in and an out. So, I'm covering this whole section of the timeline. I'm going to go back to Render, and Expert Render in to out. And now that I've selected the entire region, not just where the playhead was at the time, originally, but all of the tracks, and all of that time, where we have these stepped layers. Now the Expert Render has come up saying, actually four effects need to render.
In fact, what the Expert Renderer has done, has been extremely cautious about what's required to give you full frame rate playback. This would say five if I hadn't rendered one already. In fact, let's do that. I'm going to go here, and I'm going to go to my Render menu, and I'm going to choose Clear Renders in to out. I'm going to say OK. And Media Composer's going to delete those pre computes, those preview files, those render files, whatever you want to call them, that are the newly created media for the effect.
So, now all of these effects may or may not need to render. Again, I've still got my in and out marks, so I'm going to go Timeline, Render, Expert Render in to out. And there we are, five effects out of six. So, what Media Composer has done, you can just see on the timeline here, is deselect one of the clips, and only one of the clips, that has an effect applied. Our background video doesn't have any effects anyway, so that's okay. And the Expert Renderer is suggesting rendering every single other item, just to be on the safe side.
Now, this is a pretty good spec machine that I'm working on, and I can tell you that we should be able to play at least two layers of this without rendering. You can choose to modify the selection, and add items here. But, I'm going to approach this a different way. I'm going to go back to my timeline, just check that Expert Render dialogue's gone, and I'm going to play through this section. Okay, lots of red lines. Now that I've got those marks to show that frames were dropped, I'm going to go back to the Timeline menu, and into Render, and into Expert Render in to out.
And now, we've got a new option. Media Composer is saying that we can render the entire selection, or just recommended ranges. Media Composer's using these dropped frame indicators to selectively render what needs to be rendered. So, it'll be a little bit faster. I'm going to say OK, and let's see what happens. So, we're back to our timeline, we can try playing it back again. But we can see, this time around, only four of the items have been rendered. Two of them now, have been left untouched.
Let's try this out. Well, that looks pretty good to me. Remember, some of those clips are slow motion anyway, so we won't expect them to play at full speed. Of course, the Expert Render option has still been pretty cautious. We probably could have gotten away with, perhaps, one more layer of this video playing back without dropping frames. And we could get around some of this work by creating a sub master effect, and just rendering that manually.
But it's good to know that Media Composer is able to perform some kind of analysis, based on this playback performance feedback.
- Importing and transcoding media
- Creating a group clip
- Syncing picture and sound clips
- Making quick edits such as stringouts
- Recutting a scene
- Creating subsequences
- Pacing a scene with Media Composer's trim tools
- Mixing sequence audio
- Working with high-res media
- Retiming video
- Nesting effects
- Keying video
- Animating titles and graphics
Skill Level Beginner
Q: This course was updated on 10/13/2017. What changed?
A: New videos were added that cover what’s new in Media Composer 8.7, 8.8, and 8.9.