Make Camtasia Studio 8 Rendering Faster!

  • 13
  • Idea
  • Updated 8 months ago
  • Implemented
Multi-Core Support in Camtasia Studio 8 - It appears that the rendering program for MP4's in Camtasia 8 isn't able to render using more than 1 core. Make it take full advantage of today's hardware with multi-core video rendering.
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Justin Gehring

  • 9 Posts
  • 1 Reply Like
  • Hopeful

Posted 4 years ago

  • 13
Photo of Dave O'Rourke

Dave O'Rourke, Senior Software Engineer

  • 1301 Posts
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Official Response
Thanks to all who have reported their results. We were able to reproduce the issue, and we believe we've isolated the problem.

The render pipeline runs at 30fps. This is true in both CS7 and CS8. This means that the timeline is composed at 30fps, and that's what you see in the preview window. For production, we do the same thing, but we drop frames at some point in the pipeline in order to get to your desired production frame rate. The key to the performance difference is *when* we drop the frames. In general, we want to drop frames (from 30fps down to your production frame rate) as early as possible, so that we don't do any extra work that will be thrown away later in the pipeline.

In CS7, we did the composition and scaling *after* dropping down to your production frame rate. In CS8, we moved the composition and scaling to the GPU, which is way faster than doing it in software. But this work occurs *before* we drop down to the production frame rate.

For example, at a production frame rate of 1fps, we're still doing the composition and scaling of the timeline at 30fps, and then throwing away 29 of those frames each second. Obviously, that's going to slow things down.

The upshot is... at a production frame rate of 30fps, CS8 should outperform CS7. At production frame rates less than 30fps, CS7 may be faster. At 1fps, you'll see the biggest difference between CS7 and CS8.

We're working on a fix. I've changed the status of this thread. Thanks again to Justin and others for bringing this issue to our attention. We'll post more info here when we have addressed the issue.
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Kevin Liu, Sr. Software Engineer - Camtasia Studio

  • 91 Posts
  • 8 Reply Likes
Official Response
802 is live which has improved the production rendering process along with many other fixes. Version history of 802: http://www.techsmith.com/camtasia-ver...

Download link: http://www.techsmith.com/download/cam...

Hope this helps.

Kevin Liu