Camtasia : Sound and picture don't match

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  • Updated 4 weeks ago
Hi,

I have a video where I speak. So the sound is embedded in the video.
I watched the original, everything was fine.

I needed to cut the unwanted parts of the video. In the final video at a point the sound doesn't match : for example I already closed my mouth when my voice is on (or the opposite).

How can this be if the sound is embedded in the video and what can I do?
I hope I don't need to start it from the beginning because I have been working with it for 2 days ...

Thank you.
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ZsoltCsillag

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Posted 1 month ago

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Joe Morgan

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Is this video from a camera or a Camtasia recording?
Camtasia has trouble decoding MP3 audio. If this is mp3 encoded audio. That may be the problem.

If its a Camtasia recording, this would not be the case.

What version of Camtasia are you using? Version 2019.0.8 was supposed to correct the MP3 issues. It was released about 2 months ago.

I'll wait for your feedback before responding further.

Regards,Joe
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ZsoltCsillag

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Hi Joe,

Thank you for the answer. I use the newest Camtasia (2019.0.9).
The video is made by my phone camera, it's in mp4 format.
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Joe Morgan

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I would run this one by tech support.

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

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

Or call, >>>

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Athresh

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Hi ZsoltCsillag

Follow the below steps even it is embedded or direct.mp4 files

1. when you open the project file in Camtasia you will find the timeline with the single or double track (audio video)

2.if it is embedded split the video and audio track separately through right-click near timeline

3. you will have the separate track of audio and video once you have enabled the split-track option

4. further you can edit as you can separate audio and video 

  Note: be careful of audio sync with video don't change the placement of audio-video tracks, just  edit whichever not required

 hope it works for you 

 Regards
 Athresh
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Rick Stone

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One thing you can do is to export only the audio. You could then use something like Audacity to convert the audio and save with the following encoding



Then import that back into Camtasia.
(Edited)
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Joe Morgan

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According to TechSmith, MP3 compatibility has been resolved.
Making this a pointless step.

Obviously , Only time with bear this out as fact.
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Rick Stone

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In pondering that, I'm wondering if all one would need to do to convert a variable rate MP3 to a WAV that Camtasia "Likes", would be to just export the audio as a WAV file, then suck it back into Camtasia.
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ZsoltCsillag

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Ok, now I'm really astonished. As I said the audio wasn't in sync with the video.
I just wanted to separate the audio from video, as you advised, but (fortunately) I decided to watch it again.

And in Camtasia the sound is Ok! But in the output it isn't!

This must be a bug, I think. What do you think?

My output was local Avi,  Audio Codec: PCM (uncompressed audio)Audio Format: 22050Hz, 16 Bit, Mono, 43KB/s,Interleave Audio: Every 1 Seconds

Thanks!


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Joe Morgan

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It might be your output setting that needs adjusting.

Camtasia has always processed 16,000Hz audio well.
I would try rendering at 16,000Hz
By all rights, this shouldn't be required.But I'm thinking it might work.