When I produce a video, It plays at slower speed than orginal file

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  • Updated 1 year ago
Something strange. I am using Camtasia 8 the latest version.
I had a 30 mins video clip and I did some editing on it, such as adding a logo or moving text on the video. When I export it in MP4 format, I realized the Audio is not sync with the video. After more investigation I findout in fact the video is playing at a slower speed thats why the audio is not sync. It means the output video is only included 25 mins of footage and it has stretched to 30 mins in slowmotion.



have you encountered with something like this?
My setting is:
The original video is in Full HD about 6-7 GB and the final output will be full HD with 50% quality in MP4 format
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mediam17

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  • confused

Posted 1 year ago

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kayakman, Champion

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try this test ...

put you video on timeline in a new project

put playhead at 1 minute mark [60 seconds]

make playhead selection from there to end of timeline and use ctl-X to cut it off

you now have a 1 min project

do no editing

produce it

is the resulting video 60 seconds long?
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mediam17

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the final result is 60 seconds long (same length as source file ) But its include something like 50 seconds of footage, This 50 seconds is playing in slow-motion so it fits in the 60 seconds duration.
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Joe Morgan

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Where is your source footage coming from?

Is this a Camtasia recording? 

A camcorder, smartphone, etc.? 

 It's sounds to me like a format compatibility problem is probably at the heart of the problem.  "Unless were talking about a Camtasia recording?"

In which case you will want to convert the footage into another format using a video converter. Then it will probably render correctly. Camtasia cannot intrepid all footage correctly and that's the only option in those cases.

HandBrake is a free video converter and there are several other video converters out there. HandBrake is  a little confusing to get handle on. My favorite free app has added watermarks unless you purchase it recently. I haven't found another one to recommend yet.

Regards,Joe
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mediam17

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Its not camtasia recording.

I used handbrake and render it to MP4 format again.
The source file was about 7GB after I reproduce it by handbrake, It becomes 1.4GB

When I used the handbrake output file in camtasia and created my video, There is still slow-motion problem.

I havent tried changing it to another format in handbreak yet.
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Joe Morgan

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You have something very odd occurring then. That conversion should have alleviated any compatibility  problem.

I would contact tech support, let them dig into this for you.

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

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

Or call, >>>

 Toll Free: 800.517.3001 (U.S. & Canada Only)

8:00 AM to 7:00 PM EST Monday through Friday

Regards, Joe

(Edited)
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mediam17

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I contacted support and they told me to use handbrake, no fix for their software.
Mind this when you buy Camtasia. If you encounter with bug and errors, They would pass you to use a third-party software instead of fixing their encoder.