Low frame rate video causing problems with stitching, etc. when imported to Camtasia

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I imported a screen capture from an iPhone captured with TechSmith's own screen capture app. Once I began splitting and stitching in the Camtasia timeline, frames would randomely be dropped and show only as black, including a certain period of about 2 seconds. Mostly it was at stitches or between split portions of the clip. But it would not happen consistently on playback. I figured it was simply an issue during editing, however, it was present upon export, too. I found the screen capture was at a rate of 11.92 FPS. There was no way in the iOS app to change this setting, so I converted the clip to 30 FPS using a third-party app. I re-imported and re-edited the project (I tried to simply replace the media, but the timing was off with other elements I had included). Working in the timeline, the previews and the export were all flawless after using the new frame rate version. Is this a bug? Is there a better way to do this to keep frame rate from becoming an issue in the future?

Thanks in advance for your help!
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hudsonja

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Posted 3 months ago

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rg

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Most video editors rely on standard industry frame rates, so it makes sense that this worked better after conversion.  Standard frame rates are 30fps (or 29.97fps if using drop-frame, which evolved due to the difference between timing needed for broadcast and ... oh, never mind) or 60fps (the incoming high frame rate which still isn't all that common among non-gamers) or 15fps (common among security cameras) or 24fps (the legacy film standard, still robustly in use).

However, I confess that I've never heard of 11.92fps.  That exotic frame rate might well account for the appearance of black holes, since the system is trying to make 11.92 work within 30, and the multiplication could result in missed information every xx frames.

What conversion program did you use?  I am currently partial to WinX because it produces good quality results.

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hudsonja

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Hi rg,

I used Handbrake on my Mac. I know there are versions available for Windows and Linux, too. https://handbrake.fr/

The Windows computer I use for work is not allowed to download and use Handbrake or other applications within our corporate's locked down IT environment, and getting any software approved for use is a *major* headache. I wish I could find a safe online conversion option I could use. Or, have Camtasia handle the file correctly from the get-go.

I had never heard of 11.92 FPS either. Fortunately this just a practice project to get my processes in place before beginning to pump out a load of edited videos. I'm glad I hit this snag now instead of during real production. 
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Joe Morgan

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So, for context here.
SnagIt is a TechSmith screen recording device.It's FPS capture rate is all over the map.

If theres a lot of screen activity, cursor moving, content re-scaling and moving it around,etc.
This triggers a high capture frame rate.

If you're recording a relatively static screen."Mostly unchanging"
Frame capture rates will bottom out.

These are 2 random SnagIt screen recordings from the past. My settings are High Quality which allows for up to 30fps.
Yet, the SnagIt 2020 recording comes it at 24.09 fps.
The 2018 recording is 12.93 fps.
Place either of these in Camtasia, on my computer.I have no missing or black frames.
I have many other video editing programs. I can assure you I've never had a problem re-editing a SnagIt recorded video in any of them.
My SnagIt recordings don't typically reach 30fps.There always somewhere south of 30.


This is nothing more than typical TechSmith  recording device behaviour to me.
Heres an example I just recorded.
Its a 1 minute duration recording of this webpage.
I recorded a static screen.
Its 5.97 fps.

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Joe Morgan

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What version of Camtasia are you using hudsonja?

The 11.92 fps rate should not have created a problem.

To match project frame rate settings. Video editors will fill in missing frames with duplicate ones. To boost frame rates of 11.92 or 12.93 or 17.77.
It doesn't matter what the initial frame rate is.

If you added that 11.92 fps video into a 240fps timeline/project. It will be converted to 240fps. Using hundreds of duplicate FPS.

There may have been a glitch in the recording that made Camtasia throw errors?
Or perhaps the program has an error that requires a repair install or a re-install to reset?

If this keeps occurring, you probably have a problem with Camtasia itself.

With cell phones, incoming calls and things of this nature can corrupt screen recordings.
This may be a one off glitch, regardless of what triggered it.

I wouldn't worry about it unless it keeps happening {:>)

Regards,Joe

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hudsonja

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Hi Joe,

I'm using Camtasia 9 on Windows.

The screen capture was taken using  TechSmith's iOS app Capture v. 1.5.4 on an iPhone SE. To my knowledge, there were no incoming notifications, etc. while capturing the recording, which was only ~2 minutes long.

The recording worked flawlessly as a whole video. There were only issues once getting cut and stitched to itself.

Hopefully it doesn't happen again.  If so, I will have to use the conversion-to-30-FPS fix using the third-party app on secondary computer, but I hope to avoid that hassle every time. Today I will try to recreate the scenario with a new capture and new project.
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hudsonja

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Okay, I may have isolated the issue. It doesn't seem to have anything to do with frame rates.

Rather, our company uses Microsoft OneDrive as well as apparently mapping our My Documents folder to a network location. It seems videos nested within one of these two locations will cause the issue. I know not to pull from the network location, as Camtasia throws errors. But it seems to also be happening from OneDrive locations. While OneDrive has files saved locally, I'm wondering if the cloud syncing process is causing an issue?
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Joe Morgan

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I can't answer that,
Tech Support might be able to help you.

This is a Free Service............... Submit a ticket

       https://support.techsmith.com/hc/en-us/requests/new




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hudsonja

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Thanks, Joe.
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Paul Middlin, Employee

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hudsonja, that's a pretty good guess. Nice problem investigation on your part!
I would strongly recommend using only local files with any video editing software, including Camtasia. 

So, the problem goes away if you don't have it syncing with OneDrive?
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hudsonja

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Thanks for replying, @Paul!

I haven't had a chance to fully dig  into the OneDrive issue. I originally figured the OneDrive option would work since it does save it locally first, then sync with the cloud (therefore present in both, right?). However, the syncing possibly caused issues once cutting up the film in Camtasia. For now I'm saving to a desktop folder to be certain it's local.

(Edited)