Trec file audio and screen capture out of sync (Camtasia 9.0.3)

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I've used Camtasia (Windows) 8 and 9, and never had this issue before.
I record lectures, capturing the PowerPoint presentation using the add-in. My laptop captures the audio. I do not use the webcam.
My trec file is completely screwy - the screen capture is 5 minutes shorter than the audio by 5 minutes on an 80-minute lecture. I know the actual capture time because I simultaneously make a high-quality video and then combine the lecturer on top of his presentation, using the audio as my timeline sync. However all the slide changes are completely out of place - the screen capture starting 20 seconds after the audio starts, and finishing 5 minutes before the end of the lecture.
I cannot "stretch" the clips (audio and screen) on either end, The slides are static (no video clips embedded) and the only thing moving on the screen is the pointer. Therefore I don't think there's a problem with dropped frames.
I cannot bear the thought of going through 89 slides and manually syncing them with the lecturer's voice (my video records only the lecturer, not the projector screen).
Any suggestions?
My system: Windows 7, Dell laptop E7450, MS PowerPoint 16
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kent

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Posted 2 years ago

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Joe Morgan

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Try applying clip speed to your video clip.

Right click the video and select "Add Clip Speed"


Go into the properties panel and you can type in a precise time right down to the minute, second and frame. Hopefully that will get you close enough to save your project?


You may need to add the missing first 20 seconds as a extend frame of on of the first frames and apply clip speed to the rest?This may take a little experimenting on your part.

This option is a long shot but may be easiest.It's worked before so it's worth a try. Try extracting the .trec file and see if the extracted .avi file is of the proper length.

Regards,Joe

(Edited)
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kent

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Hi.
I thought you'd provided a solution, because when I shortened the audio track to match the screen capture, everything was in sync.
HOWEVER, the video (taken by a camera) is now totally out of sync with the PowerPoint. The audio tracks cannot now be sync'ed at all. The problem is with the "short" screen capture, not a "long" audio. I'll try doing the same fix to my video track. But why the hassle?