Frame missing in production, causing "black flash"

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  • Updated 7 years ago
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I have created a screencast in CS 8.1.2 Build 1327.

The original recording has many edits, including several cuts, a few extended frames and three places where I changed the clip speed.

At a certain point, I have a part where I increase the clip speed to 200%.
When viewed in CS, the video plays seamless from the part with clip speed 100% into the part with clip speed 200%. When zoomed in to maximum, I can move the play head one frame at a time and I see no glitch.

When I produce the movie, I get one black frame at the point where the 200% clip speed part begins. The black frame does however contain the callouts that were shown, only the .camrec (Screen) track is missing a frame.

This happens when I produce the full movie to an MP4 (or WMV) and also when I produce a selection of just a few seconds around this point.

So far, I'm not able to reproduce this in another (test) project.

Is this a known issue?

When Techsmith provides me an email address, I can send my zipped project so they can examine the case.

P.S. I do have a work around for this problem: a bitmap with the missing frame at the background. Although this hides the problem, I'd rather have this solved. It is rather inconvenient to create a video that plays well in Camtasia, then produce it and view the result and then having to fix things like this.
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ErikT

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  • confused

Posted 7 years ago

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kayakman, Champion

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I have seen frame artifacts at boundaries with clips that have been grouped then a transition added; I haven't seen with speed adjusted clips [not grouped]

if you want tech support's help, you will need to contact them and log a case

https://support.techsmith.com/anonymo...
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ErikT

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Thanks again, Kayakman.
I logged a case.
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kayakman, Champion

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good

one other thought: have you tried cutting out a frame or so at the place where the video shows the black frame?

also, try applying a background color to the video [see editing dimensions controls] that is close to the mail color scheme of that part of the project
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ErikT

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Thanks for thinking with me.

Techsmith have reported they can reproduce the problem at their end. They will look into it.

I might have deleted something at that point, but I do not really remember. I only noticed this after many hours of editing and tweaking to get the required result. Then I produced the videao and showed it to a colleague and then we noticed the glitch. The total production has many cuts and copy-pastes and some clip speed changes.

The work around of putting a bitmap at the background completely hides the issue. When the frame of the .camrec disappears, the bitmap (showing the same image) becomes visible, so I now can produce a glitch free movie.

But, as I mentioned before, it's a work around and I really prefer a real solution.

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