Estimate file size before rendering

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  • Idea
  • Updated 1 year ago
I'm rendering a video right now at a lower quality to try to get it down below a certain file size. It would be great though if Camtasia could give me an estimate of what the final size will be without me having to sit and wait for it to render, since it may turn out to still be too big.

As an example of what I'd like: In Photoshop, I can choose "Export as" and then play with different file types and qualities to get to the size I need with the best possible quality and then hit "save." It would be very helpful and a time-saver to be able to do something similar with Camtasia.
Photo of jmgarroway


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Posted 2 years ago

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Photo of Joe Morgan

Joe Morgan

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Yes, that would be a great feature.

Photo of Dubie


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+1 from me
Photo of PierreGagne98


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I just found out that Camtasia 2018 treats output encoding differently depending of the audio format embedded in the original video used.  I had 2 big chunks of videos to crunch of about 14 GB each (1920 x 1440). 1 chunk was with PCM encoded audio (From a Canon DSLR) and the other with AAC encoded audio (Go Pro Hero 7 Black).  At first, I used the setting MP4 only (up to 720) for both chunks. The quality was up to 100% for both renders (960 x 720). But the rendered files gave me 155 MB for the video that came from  Canon and a whopping 1.18 GB for the video that came from the Go Pro.  Comparing the 2, I noticed that the PCM (Canon) render gave me a data rate of 359 kbps while the AAC one (Go Pro) went over 3700 kbps. To reduce the file size I used 'custom production settings' and changed the encoding mode in Camtasia from 'Quality' to 'Bitrate' and used '359' instead of the default 800 value. I now have a new render at
176 MB.   Hope that helps.