Camtasia Studio 8 Audio Not in Sync

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Why is not sound and picture not in sync in my films made in Camtasia Studio 8? The longer the movie the poorer synchronization. Does anyone have a suggestion for improvement?
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Magnus Nohr

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Posted 7 years ago

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Bruce Hart

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Hi Dave. What about the other audio out of sync problem that is caused by pausing.

I noticed that audio is always longer than video even when I don't pause and so I think what is happening is audio is being recorded longer each record session and so after each pause these longer audio recordings causes audio to progressively become more out of sync.

That problem should be very easy to fix. I think the audio at the end past the length of the video could be clipped off after each pause so that video and audio remain same length and thus in sync.

It requires way too much editing to be worth it if I can't pause recordings so I hope you guys get it fixed soon otherwise I'll have to learn a more complicated alternative to Camtasia.

If you're concerned that fix may have disadvantages because some people may want to shift the audio to the left then at least provide the fix as an option in recording settings.
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Dave O'Rourke, Senior Software Engineer

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I've not seen the issue you describe. Were you recording with camera enabled at the time you noticed the sync problems?
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Bruce Hart

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I've tested it and the problem for certain is due to pausing. Recording without pausing caused no problem. The more "pause points" I pass in the timeline the further the video becomes out of sync. To fix my videos I had to shift the audio to the left at each pause point.

I'm presuming Camtasia uses much the same code for pausing as it does for stopping. With recordings with no pausing the audio track is always longer than the video. So imagine if pausing recording does the same with that aspect and then each time you resume the next recording period is appended to the previous with the audio always being longer and pushing the next audio track further to the right thus why the audio becomes progressively more out of sync.

I don't have a camera to record from and I never turned that feature on, but if it was on by default then I guess it was on, but still the problem only occurs from pausing.

I have an Intel i3 2130 cpu, Radeon hd 6850, 16GB of ram, Win 7 and so my system isn't a weak PC either.

Others have had the same problem from pausing. Just test it with some flash game or Website GUI that has an action you can do that has an animation and associated sound. Pause and resume recording and repeat that action and you should see that each time you pause and resume, the audio progressively becomes out of sync with the video.

If you can't reproduce it then I'll be happy to do more testing and give you more info.
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Dave O'Rourke, Senior Software Engineer

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>>I'm presuming Camtasia uses much the same code for pausing as it does for stopping.

Actually, no. During a pause, audio is still captured, but it is discarded. During a stop, the audio capture devices are stopped and closed. So these are 2 different code paths.

Thanks for the additional info. The system audio captured differently than the microphone audio, and the microphone audio is captured differently when the camera is enabled. So knowing that you were noticing the sync problem between system audio and onscreen action, with no microphone and no camera being recorded are all important details.

There may be something you could try. The system audio gets captured using the "Default Format" for your default playback device. It's best if this is 16-bit, 44100 Hz as this is the format of the Camtasia Studio timeline. Other formats should work, but would get resampled when you use the recording on the timeline. So, I'm guessing a bit here, but if the sync issue is caused by the resampling, then it may help to change the setting shown here: http://screencast.com/t/tyhoNU6Z

Thanks for the additional info. I will pass this onto our QA team as something to check out. If we are able to reproduce, we'll get it fixed.
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Vishal

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The screencast link above does not work
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Bruce Hart

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Oh and I'm talking about the system audio becomes out of sync with video. Such as a flash game animation and it's associated sound becoming progressively more out of sync.

Not sure about the mic audio. I don't think I used my mic until after I knew of this issue and stopped using pause.

Also pause 20 times to ensure you see the problem. If you pause only once or twice you may not notice the problem.
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Roberto Colarusso

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have done a lot of camtasia recordings and edits over the years. I noticed that apple prores files have an out-of-sync issue which grows with the video length. This may happen with different cameras and sources.

Looks like camtasia does not like FPS of 29.97 fps or 23.98 fps. Looks like it rounds up to 30 fps and 24 fps respectively.

Solution: Run the video through http://www.macroplant.com/adapter/ (it is free) to change the frame-rate. This will fix the issue.
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Richard Hill

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I can confirm this. Imported videos of various types CAN create a noticeable lag. Thank You for the tip.  
I had a similar issue with  4fps .swf files auto converted over to avi by Camtasia(which had a 10 sec lag at the end 1 hr  ) Although Adapter helped a little(avi 4fps to avi 24 fps) there was still a significant lag, and that may be because you and I had different imported media.
* TIP - my Fix
 I found that by converting Camtasia's 4fps .avi to a 24fps mp4 in Adobe Premiere completely resolved the lag issue , after I imported everything back into Camtasia.
steps:
1. swf to camtasia = .avi that camtasia auto creates
2. find the avi  and convert it to 24 fps in Adobe Premiere
3. Bring it back to Camtasia.  
4. smile
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alvin

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With all due respect to this workaround solution, why do we still need to use another software such as premiere to make camtasia do what is expected for a video editor? That's a lot of rendering or conversion time that shouldn't be needed especially for longer videos.   It's like having your car take you 95% to your destination and then you need to call a taxi to get you to the finish line every time.  I definitely won't be smiling if this is what's needed to be done. Might  as well stick with the taxi from beginning to end.

And this lag issue isn't just with 4fps and may not work for all the other formats everyone is struggling with regarding the lag.   Add to that not everyone will have premiere and will need to invest again for it.   At least it's a work around solution for those willing to do the extra work that they shouldn't need be doing.  For us we just chose to get another car recently to solve this issue.
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Richard Hill

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So Here's the deal Alvin,  I took that car ride 95% of the way and I did need a taxi for that last 5% to convert 40 hours of video, because there is nothing else in this forum that worked for me. However if you can tell me how Adobe Premiere can make an HTML 5 quiz  I'll gladly hang up my Camtasia hat.  Otherwise please note that this was merely a collaborative reply and a Thank you to Robert Calarusso who had a similar issue importing Apple video files(as he suggested using the open source program Adapter, which did not work that well for me).   So if this extra bit of information helps someone else out who is stuck 95% of they way on importing a huge amount 4fps .swf files, and they NEED to get their job done in Camtasia for whatever reason (hotspot embedding, quizzes, SCORM export) I am very glad to help them out.(btw premiere does multiple fps conversions not just 4 as in my case)

 I am also glad to hear you got a new car, and really don't blame you for getting one.  I hope it works well for whatever you need it to do.
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alvin

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Hey Richard,

My post was directed to the Camtasia team to reconfirm to them that there still are audio sync issues and that those like yourself and myself with more technical skills have to find creative ways to get the job done.  if you see my post from 2 months ago further down you will see where I am coming from.  
This audio sync post was started more than 3 years ago due to various sync issues people were having over the years and we still continue to have problems. We've been a loyal fan of Camtasia for 2-3 years now but waiting for these numerous sync issues to be fixed (whether it is on their agenda or not)  has cost us too much time. As for yourself using Adobe Premiere or whatever 3rd party tool to keep audio in sync was more my point to Camtasia Team and Techsmith that loyal customers like yourself have to jump hoops and possibly invest more time and money on other tools to get the job done.  If we buy a car with all the features or we buy a used basic car, we at least assume it should be able to take us to our destination without calling a taxi. 

Again, I am a fan of Camtasia as well as whatever creative and constructive solutions individuals like yourself share with others, but I am posting my comments more for Camtasia Team to hopefully realize that this is another example of what loyal customers have to do to keep using their product.   We should't have to be using their product this way with the investment many of us have put into it. 

Wishing you the best with your other projects Richard. Hopefully our team can come back to Camtasia in the future when there are no more audio sync hoops we need to jump. 
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Bob Pearson

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I figured I should weigh in on this issue, as I struggled with the same thing on my ~90min. video, and read all of the posts of frustrated viewers in trying to find a solution. 

My project was a continuous camera-shot video with audio, that I interspersed with cutaways to screen capture content placed on a separate track.  I too noticed that sync started out fine, than deteriorated over time to approximately one second at the end of the file. 

I won't go into the details of my troubleshooting efforts, but the fix that had the best success was to make multiple (~10) splits of the audio, removing about 10 frames at each split.  I made sure that these splits were in periods of silence (background noise only) and were 'hidden' by the breakaway screen capture segments.  I am not sure if removing the frames was necessary, but my reasoning was that it would allow for 'expansion' of the audio clip as needed due to any sync issues.

In the end, that worked great.  I think the theory is that - if sync is good at the BEGINNING of an audio/video segment, then the solution to ensuring sync across a long video is to artificially generate multiple audio/video BEGINNINGS via the splits. 

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kayakman, Champion

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I occasionally see audio/video sync issues in video clips;

my preferred workaround is to put clip on timeline, separate audio from video, then apply clip speed adjustment to the audio clip [like 99%], which gives you the green bar; then drag the end of the audio clip [grab green bar] until the audio & video are better aligned at the end of the video; usually only about 1 to 2 seconds of adjustment will be required
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Ralph Merwin

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I have been making several tutorial videos.  They range in length from five or six minutes up to almost 20 minutes.  I use an external camera to capture an LCD screen while also capturing a screen presentation with audio.  If I try to shoot a video straight through and then edit out portions, the audio and video will get progressively out-of-sync as I cut more and more sections.

To work around this, I shoot the video in short sections, edit each section, do a final edit to make the tracks all end at the same point, make an MP4 of the section, then pull the MP4s into a overall project that needs no editing.

It's a pain, but this approach produces usable content.

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George Alexander

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It is ridiculous that this issue is NOT BEING ADDRESSED BY CAMTASIA. I don't want to have to jump through 20 hoops and add HOURS to completing projects that should take a fraction of the time. This is an opportunity for a competitor to step in and I am actively searching and on alert to find something that works as it is supposed to without adding hours to my work day.
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Dave O'Rourke, Senior Software Engineer

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George,

I'm sorry for your frustration.  We are planning to release this week that should address the most common sync problems.  If you continue to have sync problems, please get in touch with our TechSupport staff by submitting a question at http://support.techsmith.com.  Someone will follow up by email to troubleshoot further.
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robbert.goyvaerts

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This reply was created from a merged topic originally titled
brandnew laptop still dropped frames and audio video out of sync.


Hello, I'm having trouble with webcam video and audio that is out of sync. I've read a lot about it here. But I want to know: is it normal to have 400 to 700 dropped frames when you are recording with webcam size 320 x 240 and USB headset attached on a brandnew Dell latitude E7440 with SSD and still have audio and video getting out of sync after a few minutes? I already disabled GPU acceleration. Thanks Robbert

check my settings below:
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Joe Morgan

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Hello there,

I responded earlier to this and the question got buried  in this thread.
My response was discarded also. So I will Repeat what I posted.
Your CPU specs are very low. Not what you want for video editing.



If you are running Camtasia 8 you need at least 2 GB of RAM with 4GB Recommended. You have less than 1 GB. That's probably the dropped frames.
 8097MB  of  Physical memory is less than 1 GB.

To be honest.
By todays standards, your new computer is incredibly underpowered. That's the worst specs I've seen on a New Computer in quite some time. 

It's fine for the internet and  basic computer programs.
 You could add some memory to it. That might be enough to get it to record without dropping frames. But I wouldn't even count on that. 


 


Regards, and good luck. Joe
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robbert.goyvaerts

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Hello Joe,

Thanks for your quick reply. I checked my specs and there is 8GB RAM in this machine! I still find it hard to believe that the I7 2,7 GHZ processor would cause my video and audio to be so out of sync. Are there any other options, things I could try?
Thanks.
Robbert

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Joe Morgan

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If the problem persists I would submit a support ticket. 

https://support.techsmith.com/anonymous_requests/new

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robbert.goyvaerts

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allright thanks!
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Silas

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This reply was created from a merged topic originally titled
Audio distortion and slow down.


I'm running Camtasia 8.3 and just recently when I use the Record Camera option the audio it records sounds as if it is slowed down to 1/4th it's natural speed.  However, this slow down only happens 2+ minutes into a recording.

In other words, everything starts out fine.  Audio and video are synced correctly, but after some time passes, the audio will distort and slow to a crawl.

I'm recording with a Yeti Microphone, I have tried without and the same problem occurs.  I have also tried a reinstall and the problem continues.  I have also adjusted kHz for the audio to any number of them without success.
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Nadia Munro

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I found this thread and wanted to follow up as well. I am finding it frustrating that the longer my videos and the more "edit-heavy" they become, the more likely the end of the video is to be out of sync with the audio. It never starts out that way, just progressively becomes out of sync as the edits move along. I never use a camera - my videos are all screen-based video capture with a Blue external mic. 

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kayakman, Champion

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it looks like you have separated audio from video before editing?

is the audio in the original .trec initially in sync with the video part of capture?
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Nadia Munro

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No, the screen shots are just two separate tracks on the timeline, but I never (certainly not deliberately) separated the video from the audio. 
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Bruce Hart

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Hi Nadia Munro, what caused my video and audio to become out of sync is pausing/resuming the recording many times. Maybe it's still not fixed. I haven't used Camtasia anymore because of that issue.

To Camtasia Devs: Try  screen recording Candy Crush Saga gameplay with dozens of recording pause/resumes and I bet you'll get audio seriously out of sync especially at the end of the video.

I think the audio recording is always a little longer in duration than video during each period of recording. When each subsequent recording is appended after each unpause the issue becomes compounded.
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Nadia Munro

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Wow....thank you Chris Johnson - this sounds super accurate and could definitely explain the issues I've been having - I do pause/re-start fairly often to generate new screen captures, change monitors/material, etc... No suggestions on this in terms of a working solution, I guess? 
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alvin

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Are others still having audio sync issues with longer videos.  It's been a headache the past year just trying to find ways to keep audio looking like it's in sync using Camtasia.  Our videos are at least an hour and they always are still out of sync.  We don't use screen recordings and use original MP4s that we bring in that end up out of sync - it's like it keeps dropping audio consistently so as it becomes out of sync,  the audio is lagging behind when someone is visually speaking.  We've tested it out on at 3 systems all of excellent hardware specs and same results.  Everything else about Camtasia we've liked over the past few years, but we are on the verge on moving on unless the next update hopefully can finally resolve this issue.    

The workaround solution we've had to painstakingly do is separate the audio onto it's own track and then break it up every 4 minutes at a silent point.  And then we advance the next audio clip a 1/4 of a second or so and then repeat the process... it's stupid to do and time consuming, but it is somewhat of a workable solution for now.  

I do hope to hear if others are still having audio sync issues... especially those who have longer videos 30 minutes or more.  And we do hope Camtasia does resolve this soon, but we are already on the look out for something else right now.
(Edited)
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Nadia Munro

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Hi - literally the only "solution" that I have found (I agree with you that it is a huge headache) - is to avoid, as much as possible, pausing the recording. It's the only 'workable' solution that I have found. This (for me) means much heavier edits at the back-end but at least the audio stays in sync with the video/screen recordings. If there are other solutions out there I'd love to hear about them as well.
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robbert.goyvaerts

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Hello,

I've been having the exact same problems for a long time now. I stopped looking for solutions since the only thing, technical help came up with was, try another webcam or you're system is to slow. I can record a perfect video with windows Movie Maker (!), so there goes that theory. How is it possible that Camtasia can not do the main thing it is made for: simple screenrecording that works, I don't get it. Now I just readjust audio and video to sync with long video's. It's time consuming but searching forums over and over, is even more time consuming. I keep an eye on this post, in case something might have changed. But i see 'currently we do not have any open bugs for this kind of behaviour', What about all this people that are complaining in this thread?

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alvin

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Nadia: Thanks for the suggestion but you and I may have different issues or maybe the same issue depending where the problem  or problems lie.

1)  Even though we got Camtasia initially for screen recording about 2 years ago, we rarely need to screen record now and we are using it over 90% of the time for editing other video we import... so we just use the video editing component.  Therefore the pausing of the recording (screen recording I assume you are referring to) is not something we even deal with much any more.
 
(a) So is there an issue related to screen recording that TechSmith needs to resolve?

Maybe/maybe not: You end up recording a .trec file that can only be played and edited in Camtasia Studio.  You are pretty much stuck using Camtasia Studio to edit and "produce" that .trec screen recording into another video format such as MP4.  It's after you click Produce and it starts rendering is where I guess many of us cross our fingers and wait to see what happens when it's done (sometimes long minutes, sometimes even a few hours for longer videos).  

From this process it will be hard to tell what is causing the audio sync issues.  Was it the .trec screen recording itself (because you paused it too much) or is it the "producing" and rendering step where the sync issues happen.   What I am curious for you is if you paused it many times or not, when the .trec recording is in the editor and you test out the sync issues at beginning and near the end of the recording before producing/rendering IS THE AUDIO STILL IN SYNC  IN THE EDITOR?

If the .trec file is still in sync from beginning to end in the editor, then I assume the problem lies in the Production/Rendering step where it is faulty.  Camtasia should be able to screen record into it's own Camtasia format .trec and then have the ability to use it's own .trec recording and convert it into another format like MP4 without any sync issues in it's own Camtasia editing software.  

The key information here that is important is if that .trec recording made is all properly in sync in the Camtasia editor before any production and rendering done.  

Nadia: Is this something you are able to check with any old projects to see if the original .trec is in sync from beginning to end in the editor?
One test you might be willing to try out is to see if you just screen record some kind of 1 hour video you can find online for test purposes and see if the .trec file in Camtasia stays in sync from beginning to end in the editor.  I may try this as well again, but I believe it stayed in sync for us in the past before any producing and rendering were done.

(b) It will be an issue with Camtasia's Screen Recorder IF IT PRODUCES a .trec FILE THAT IS ALREADY OUT OF SYNC WHEN IT IS TESTED IN THE EDITOR.   So if you did your screen recording  and then review it in the editor and the ending is already out of sync, then I will assume there is an issue with the Camtasia's Recording Application.  I don't recall having that issue before, but let's see if anyone else can confirm this with us or if they already have an out of sync .trec recording right after in the editor.  

2.  Since we are not using the Screen Recorder as our video source, but still have Sync issues, I can't fuzz about the Screen Recorder.  But what I can make issue with is when I bring in what appears to me a solid MP4 video file with everything already in sync and then Producing it again as another MP4 (not even doing any edits to it), let it Render, Cross My fingers, wait and an hour or so later I see the results... and bam... the video and audio are all out of sync with the ending being out of sync as much as 1-3 seconds on a 1 hour + video.  

Therefore my assumption on my end is that it is Camtasia's Production and Rendering process that has the problematic issues or it is the settings in the original video that have problematic issues that Camtasia can't properly work with (notice that I'm being nice here to Camtasia leading on that it may be our video with the problem...
but in the end, shouldn't the editing software we have be able to handle any video we give it and keep it in sync). 

By the way, the original videos we've used are from Webinars we do such as WebEx and recently ClickWebinar.  The video files are generated by the webinar services themselves and we do not screen record them.
We also use a Canon HD video recorder (I don't have model # at the moment) for recording ourselves dong a presentation or for promotional videos, but settings have always been on decent to high settings for HD recording and the resulting file we use are solid quality MP4s.    All of these webinar recordings and Canon Video recordings have given us sync issues after the rendering is done.  Prior to any production, everything looks fine in the editor and everything is in sync.  Once the rendering starts and complete is when we have the sync issues.

I know this was a very long response, but I wanted to be as precise as possible to see if others are in the same exact situation as one of us or if they are finding the sync issues in other steps that I missed.
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alvin

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Robbert: Thanks as well for your feedback such as Nadia's which reconfirms to me that others are still having sync issues throughout the process.  I just think many have given up or not posted or not going to go to tech support.   This thread has been around for about 3 years I think and similar to you we have consumed so much time to try and read through all the postings here (and other threads and places online), but nothing seems to be solving the problem.  And when someone says it seems to work for them, there is no full confirmation or follow-up from them if it really is working properly.   There's also no confirmation from techsmith as to where the real issue or issues lie.

There are so many work-around solutions like what we are painstakingly doing (readjusting audio and video, clipping audio pieces into smaller segments and moving them as needed,  splitting video and audio is good, splitting video and audio is not good,  adjust the audio clip speed to 99%, change a hardware setting if you have a specific laptop, and so on and so on).  It seems as though most of the responses and those in other threads are frustrated users trying to help other frustrated... no matter what  seems to work, there are still sync problems happening.

I looked at your initial post that shows as of now 11 months ago.  Similar to Nadia it looks like you are doing screen recording as your video source.  Can you let us know if the syncing issues are already showing up right after you record and have the .trec file in the editor?  Can you let us know if it is still in sync at the end or not?

If it is still in sync, then can you confirm if the problem only happens after you produce and render?

Thanks for whatever other feedback you can add Robbert.   I feel your pain as many others have posted in this thread and in numerous other threads spread out in the forums and online over the years :)
(Edited)
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robbert.goyvaerts

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Hello, i will describe as precise as possible:

I start a screencapture with the PowerPoint plugin to screen record PowerPoint presentations with audio recording from a usb microphone (logic) and the build-in webcam of my laptop. Basicaly we are recording someone giving a presentation in front of the laptop. I do know that recording can be problematic when you're quality settings from the webcam are too high. The system seems to have more difficulties processing this. So I use SD settings for the webcam.

When you finish you're recording, you can open up the saved .trec file with camtasia and review what you did. It is already in this step of the proces that longer video's will be out of sync. So in the timeline, there is one track for webcam video and audio and it is out of sync. So I seperate audio and video and readjust.

I really thought it was my system that could not handle proper webcam video and audio recording and screen capture recording at the same time. But it surprised me to find that when i combine Windows Movie Maker and Camtasia I can make a perfect recording. Let me elaborate: i start a screen capture with camtasia recorder (without webcam video or audio), then while recoring I go to windows movie maker and start a webcam recording with audio (of proper quality). Even at longer video's this will work perfectly. Windows Movie maker does not mess up the syncing of my webcam video and audio and the screen recorder worked perfectly.

But you do understand that this proces is rather stupid when you supposed to have a software that makes this whole proces easy and user-friendly. I do not expect the professors to go fiddle with multiple programs at the same time. And the PowerPoint recording plugin is really handy and works very well for me (except for the syncing). So I continue to do my audio readjust routines.

So somehow camtasia does not seem to have a solid proces of recording audio and video in sync. Even when there a some hickups or systems flaws, the recording proces should be solid, just like... windows movie maker for example :)

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Kelly Mullins, TechSmith Employee & Helper

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Hi Alvin and Nadia,

I'm sorry you are having trouble.

Currently we do not have any open bugs for the behavior you describe.

We would like to get more information from you about your projects, source files, etc.  Can you please open a support ticket so we can look into what is causing this out-of-syn issue?

TechSmith technical support is a free service and you can submit a ticket here:
https://support.techsmith.com/hc/en-us/requests/new

Or call: 1.517.381.2300
Toll Free: 800.517.3001 (U.S. & Canada Only)
8:00 AM to 7:00 PM EST Monday through Friday

Thanks so much.

Kelly
User Assistance
TechSmith
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alvin

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Hey Kelly,

It is appreciated from me that you responded in a timely fashion to try and assist. 

I agree with Robbert's last comment/question in his response even though  you said there are no opens bugs around this audio syncing issue (with tech support).  There definitely are numerous grumpy Camtasia users hanging in there to find ways to use your company's product and a few of us over monthly gaps are chiming in about the problems we continue to have.  I'm sure there are many more out there having the exact same or very similar sync issues that just are not taking the time to post in these threads or connect with tech support.   Do understand that I quite enjoy using Camtasia for it's friendly user interface and overall ease of use... we were even and still are happy with the screen recorded when we need to use it.  The whole process works well for me in working on a project, but where it screws up is at the very end for us when rendering is done and sync issues show up.   I'm a fan of everything in Camtasia up until that point.  

We've been patiently hoping that every next update resolves the sync issues, but for us it still hasn't.  We are hanging in there using Camtasia still, even if that means using creative and time consuming  solutions to make the end result work,  but we are at the point where it is just not worth the time for us to keep using duck-tape type solutions by fellow Camtasia users who are also trying to hack away at producing a decent video for their projects.  

Maybe I'm waaay off on this issue and it's just still a handful of us having the sync problems, but most of us who have posted in these sync issue threads seems to be pretty technically inclined with smart observations and solid tests to try and resolve the issues.   Still to this date I haven't seen a clear post from techsmith anywhere confirming where the problem is and how a Camtasia update resolved the problem.

In the end I still want to be using Camtasia, but over the next few weeks if we can't resolve our sync issues on our end with your assistance or solid solutions from other users, then we will respectfully move on to another competitor :)

BTW,  we did use tech support briefly I think a year ago and I recall vague suggestions were thrown out, but none of them resolved it and we just said we will patiently wait for the next update to see if it gets fixed.  A few updates later we still seem to still be waiting on our end for a fix.  
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Kelly Mullins, TechSmith Employee & Helper

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Hi @Alvin,
I was just looking into another post and something you said in your post caught my attention.

You say you are getting your videos from another source and those get out of sync. Here is what another person posted as a solution to their videos from another source being tinny sounding or out of sync:

********************************
In this thread someone stated that Camtasia Studio requires a bit rate of 128 kbps audio at a sample rate of 44.1 kHz.  The MP4s that I am using are converted from Webex ARF files. The resulting MP4 is created at 17 kbps bit rate and 8 kHz Audio Sample Rate.  If I take this file and import into Handbrake and convert the audio and video together with the audio set at 128 kbps bit rate and 44.1 kHz Audio Sample rate, the issue is resolved once I take the file that Handbrake creates with these settings and import it into Camtasia. 

If you are having this issue, please make sure that you check you MP4, if it is less than 128 kbps bit rate and 44.1 kHz you will have the audio trouble once you import to the Camtasia timeline. 

*****************************

So, I was wondering if you converted your videos before bringing them into Camtasia, if that would solve your issue?
Maybe give this a try and let us know.

Kelly
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alvin

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Hi again Kelly,

Because your profile icon is some kind of stuffed monkey (or duck with elephant ears) or whatever it is, we will test your suggestion out with some of our original video files to see if the syncing is resolved.  

I don't recall ever seeing these minimum specs posted anywhere and unless you shared this other users post with me, I would unlikely find it.  

It might be the case for some of our original video files to have lower bit rates and sample rates that converting them with Handbrake may resolve the issue.   We've used WebEx, ClickWebinar MP4 files,  Canon HD Video Recorded MP4 files, and the occasional Camtasia screen recorder directly.  

I will try your suggestion first  Kelly and see if converting the original video prior to importing it into Camtasia will make a difference.  I will hopefully update in a couple of days.  

Thanks Kelly
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rickyhan24

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I have tried installing Camtasia Studio 7, after I had version 8.  It did not solve the audio lag.

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Kelly Mullins, TechSmith Employee & Helper

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Official Response
Hello,

We just wanted to let those following this thread know that we have a fix for the audio syncing issue which will be our in the next release of Camtasia Studio.
While I don't know the exact date of that release, it should be out by the end of Q3 of this year.

In the meantime, if you are experiencing a sync issue with long videos on your timeline, we have found adding a split to the clip every few minutes will eliminate that problem. While this is not a fix for the bug causing this, it is a workaround that seems to work for most people.

We apologize for the issue and and trouble this has caused. Please be aware we working on resolving this issue and are committed to getting it out to you as soon as we can.

Kelly
User Assistance
TechSmith
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cblack

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My audio issue actually occurs when I do splits. When I produce the video, the sync problem doesn't exist. When I split, the audio goes back something like 8 seconds. It's very weird, though.
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Vonnie Hudson

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The reason I split the audio and video is so I can enhance the audio in Adobe Audition.  When I import the audio back in the media library and add it to my timeline the audio invariably looses sync after a few seconds.  I'm forced to go through the painful process of trying to find the ideal place to cut the frame so I can match up my lips with the words.  Finding that magic sync point manually is extremely time consuming.  Do you have any suggestions please?

Vonnie
fixedbyvonnie.com
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Keith Beasley

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Hi. I've just installed the latest Camtasia - version 8.6.0 build 2054 (Aug 15 2015) hoping it would solve the sync issue, but absolutely no improvement! I don't even need to split a video to get the sync issue, nor to have a long video. I've just recorded a mere 12 seconds on my Logitech C525 and it was out of sync! By separating video and audio and moving video ahead of audio by .08 seconds, it's OK . ..  but this amount seems to vary between every recording. So is this the same issue as others are getting or not? (I'm on Windows 7 with all updates). Any suggestions please!
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Matt DiCato

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The audio files cannot be a .mp3. It will work with a .wav. i would suggest downloading 'Audacity' and importing the audio file to it, and then exporting it to convert to a .wav. You should have no issues after that - atleast I did not.
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info

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@Keith. My issue is just like yours. I am using a Logitec C920.
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Kelly Mullins, TechSmith Employee & Helper

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Hi,

I think for these sync issues where you are using specific hardware, you should contact our technical support team.

They will know of any existing issues, driver problems, conflicts with hardware/software, etc.
You can open a ticket here: https://support.techsmith.com/hc/en-us/requests/new

Our technical support is free and they strive to get back with you within 24 hours.

Please reference this Get Satisfaction post via a link when creating your ticket.

Kelly
User Assistance
TechSmith
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dkoos

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Hi Kelly,
Is the fix for the audio sync issue already included in version 8.6. I tried it and I am still experiencing  the issue. You mentioned that the end of Q3 there is fix coming. So it is already Beginning of Q4 now and  I do not see any improvement. 
I already contacted the support few months ago which was not a big help.  A got an offer to renew my maintenance contract but because all the updates you release are useless for my purposes I am not gonna renew the maintenance contract.
Best
David 
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Kelly Mullins, TechSmith Employee & Helper

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Hi,
I'm sorry the fixes did not correct your issue.

I think you should contact our Technical Support team.
They are better equipped to diagnose what might be causing this issue.

Please contact them here:
Call:
Phone: +1.517.381.2300
Toll Free: 800.517.3001 (US & Canada only)

Or, enter an online support ticket and copy/paste the link from this post into your ticket:
Open a ticket here.

Kelly
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bvpratt

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I imported a .mp3 file which I am trying to edit so it fits with a seperate PPT recorded video track. I keep trying to clip the audio so a) it's shorter and cleaner & b) it syncs with my video ... but the Camtasia 'cut' (clip out) function does NOT clip the exact section I highlight ... it does a bizarre cut that makes it impossible for me to guess what is actually being cut and what remains. Effectively, I am unable to accurately clip out any segments of my audio. This is more than a bug to me; this is major functional error - is this being fixed?
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Joe Morgan

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Mp3 files create problems in Camtasia at times .The best thing to do is convert the mp3 to a .wav file u sing these settings.


You can use a program like Audacity to convert the audio.

You can also use Camtasia to convert the file following the steps shown below.
Click image to enlarge it.

Regards,Joe


(Edited)
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Ben Krefta

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I will keep fingers crossed that the next version after August's 8.6 release will resolve the video-audio sync issues.

Love the software, but does not work with lengthy web cam + audio recordings :(

Until it's fixed, if anyone knows of alternative software which records web cam, audio and screen capture without issue, please let me know.
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dkoos

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Hi,

I had contact with Techsmith support and they told me they know all these issues on sync problems and won't have a fix for that in the near future. I tested a lot of recording tools and the one which was working fine was Bandicam. I did not try webcam recordings but it is supported and guess it should work fine.

Best
David
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Adam McBride

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splitting my video doesn't always fix the sync issue
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kayakman, Champion

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have you tried separating audio from video, and applying clip speed adjustment to the video clip, to change its duration to match the audio?
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Adam McBride

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I have had to manually adjust the audio to match the video in the editor.  
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Bob Pearson

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I have two solutions that consistently resolve my audio/video sync issues.  I work with converted Canon files (to mp4) almost exclusively:

1)  If I am working with one set of files (from one camera only), separating audio from video and inserting simple audio splits every 5 minutes does the trick.  Takes about 2 minutes to do this for a 2 hour video.

2) If I am working with 2 sets of files (from two cameras), I need to line the two audio tracks up at the beginning, and progress through to ensure that they are synced throughout the full duration.  Frequently this involves making <15frame cuts to both audio and video every now and then.  Sacrifices nothing in terms of quality, assuming my camera edits are done strategically.

Works every time.

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Christian King

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Unfortunately this doesn't work for me. I'm editing a 40min webcam video and there are lots of splits, I separated the audio and video and it plays back fine when I put the playhead at a particular part in the video (i.e. whilst I am editing). But as soon as I try and playback the whole video edit or export it glitches the A/V sync every time it hits a spit.  My PC should be more than up to the task and I frequently use Adobe Premiere on this PC without issue. It looks like a problem with camtasia syncing frames correctly.  I don't recall having this problem last year, very frustrating as it is making Camtasia useless..thinking of moving to Office Mix instead.
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Christian King

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I was thinking about this and tried a few computer to see if the problem was my computer running Camtasia 8.6. I still had the problem when rendering the file as an mp4, but playback of the edits seemed fine within Camtasia Studio 8.5 on another computer, so it seems my problem is a rendering issue. Anyway on a whim I decided to Camtasia record the playback of the edited video within the Camtasia Studio Editor. Lo and behold no issues with audio/video sync. A bit of a ridiculous solution, but it worked.
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pterpelu

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Any update on when a solution will be rolled out?  I'm having the same problem.  I'm recording using Camtasia Studio Recorder, pausing often, and some of my videos have been 30 minutes long.  The problem is definitely worse the longer the video is.  Since this is one file only (.trec), is there any way to split the video and audio as some have suggested?
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kayakman, Champion

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best resolution would be to keep your captures [recordings] short, and assemble them on timeline as a single project; I keep mine to about 2 minutes each

you can set Recorder to not preview the capture, but instead, put each capture on timeline when you finish it

I also set Recorder to pause at start; I do not use the countdown either

using this approach, I do not have any issues with audio/video sync
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pterpelu

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Kayakman, great ideas on how to be more efficient with my longer captures.  
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Adam McBride

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or, it could just work the way it's supposed to for non-free software.  I just switched to screencast o matic and have had zero problems.  
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Tamara

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Jan 2018 still happening :(