WebEx video editing

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  • Updated 6 months ago
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Hi. We use Camtasia to edit WebEx audio/video recordings of meetings, to add callouts, zooming, and to edit out goofy things people say :0) However, when we render an MP4 file, it seems the 1080p resolution ends up a little blurry, sometimes TOO blurry to be useful. Almost always, these WebEx sessions were conducted on large displays, but pulled into Camtasia and edited on a laptop, with a much smaller display. I would think, from what I know of bitmapped file formats, that going from large to small should not result in any lossy quality, but it appears that's exactly what happens. Even when I have not zoomed in, and am showing the full size of the original video on screen (no zooming), everything just looks choppy in final output (MP4 1080). We are using 8.6. Are there better export resolutions available in newer versions of Camtasia? Or can I do something differently in 8.6 to avoid this quality degredation?
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Mike Due

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Posted 6 months ago

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paulwilliamengle

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Hi Mike, 

From this tutorial - https://www.techsmith.com/tutorial-camtasia-getting-crisp-clear-screen-video.html - I'm sure aspect ratio does place a part in troubleshooting this issue, but beyond screen size, I wonder how the display resolution of the computer on which the recording was made compares to the computer on which the recording is being edited. 

Long story short, ideally you'll record, edit and export in the same dimension for maximum quality. You can record on a larger resolution and edit/export on a smaller dimension if you want to zoom and pan a lot. But I think it's where you record on smaller resolution and edit in a larger one that you get into a spot of trouble, picture-quality wise. 

Cheers!
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kayakman, Champion

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sorry Paul ... unintended photo finish
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paulwilliamengle

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Great minds think alike. : ) 
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kayakman, Champion

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I don't use WebEx; what dimensions are those recordings?

what dimensions is your laptop screen?

always best to record/edit/produce using same dimensions



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David B. Demyan

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I don't trust the WebEx file format and conversion to MP4 process. Without evidence, I believe the original WebEx format is lossy for reasons that do not emphasize retaining top quality in the recording. I suspect the recordings are compressed to limit storage requirements on the Cisco servers.

Many times, I use the Camtasia Recorder instead. And lo and behold, the resulting file size is **much** bigger. This indicates to me the WebEx format is highly compressed. Again, no real evidence to base my workaround on, but I've salvaged many a crappy WebEx session this way.
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paulwilliamengle

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I mean, wouldn't a good test be: do a webex recording with a camtasia recording on top of it? And then compare the two resulting video files? 
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Rick Stone

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David, when you say you "salvaged" crappy WebEx sessions, are you saying that you played them back using WebEx and then recorded them with the Camtasia recorder as you played them back?
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David B. Demyan

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@Paul, I do think that would be a good test. Please let us know your results :-)
@Rick, what I meant was instead of using the WebEx "Record" button, I fired up Camtasia before the WebEx started and hit the Camtasia record button instead. If anyone else tries this, make sure you enable system sound recording first (or else you'll have a mute recording). Also, whenever the conference group takes a break, stop the recording and save the file, then start a new one when they resume. I've done day-long conferences this way, not to replace the host's WebEx recording, but as a resource to build e-learning from--highly edited and rebuilt, naturally.
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paulwilliamengle

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And David, you mean 1) start Camtasia first for high-quality recording and then 2) start web-ex so the organization will have the meeting recording in this cisco cloud for their needs? 
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David B. Demyan

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Yes, Paul, exactly.
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rg

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I can't speak for the video quality of a Webex recording, but I know from experience that Webex saves bandwidth by crunching audio into a digital mess.  Webex recordings were not intended to replace podcasts or video; they are more like chicken-scratchings than calligraphy.