Audio Drift when Rendering (19.0.2) - Camtasia 2019

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Preview window audio out of sync with rendered audio. (Maddening.)

OK, maybe my video is too long (48 min), but when I get it perfectly in sync in the Preview, it ends up out of sync in the Rendered video the longer I go in the final.

To get it perfectly in sync in the Preview, I have to put a split in every 10 to 15 min, and take out the equivalent of a few frames of audio and then the audio/video are in sync again in the Preview.

******

I have exported the audio only, it's a 44.1K WAV file. I'm processing in RX 7 Advanced.

Should I convert to a 48K file after exporting before bringing it back to Camtasia?


Why is it in sync in the Preview window, but out of sync after rendering, and what can I do to mitigate this?

All best practices welcomed! (I have another 3 hour of video to edit/render soon, so all input welcomed.)

PS:  I am also having issues with the new "Auto-normalization" where it's clipping way too many times. I turned that off as it's not ready for prime time. I'll post a seperate thread about that later... after I solve my drift issue.


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DBaarns

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Posted 2 months ago

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Joe Morgan

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Try ignoring the out of sync audio in the editor and leaving it alone. Don't change anything or try to correct it.
Export the video and see if the audio is Okay.

Let us know how it works out.

Regards, Joe
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Joe Morgan

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If this is audio from another source other than a Camtasia recording.

Convert it to 44,100 Hz .wav 16 bit That's still Camtasia favorite audio format and settings.
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DBaarns

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A couple details:

If rendered out without doing anything, it's out of sync, which is how I started learning that I had to go in and cut things to get it all back in sync on longer videos. This happened in Camtasia 2018 too...

It's originally recorded in Camtasia, with both screen capture, and system audio being captured. Then a WAV is exported, to do some processing on the WAV file, saved as WAV (from RX 7 Advanced), keeping the same 44.1 format (no conversions in that loop).

It's imported back in, zoomed in to the closest possible to verify audio alignment is the same as original (Original audio track frozen after export). Is in sync with the video at first... later in the video it's out of sync.

File sizes after export, then import are identical down to the byte.

Audio is out of sync with the camera after 10-20 minutes. Cut and then take out a few frames, back in sync, 10-20 min later, slightly out again.

I'm above average in terms of audio expertise, and using above average mic/interface/processing software.

Captured with input set to 44.1 k from the Interface... 

Doesn't ruin my day, I've learned to hack around it. Just wastes time as sometimes I have to render 20-40 min of video a few times if I don't pay attention and compensate at some intervals.

I was hoping 2019 would be better, but it's the same as 2018.

I can use OBS to film next time this happens, and when I use it to do screen recording, it doesn't drift with all the same equipment...
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DBaarns

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PS: I installed 19.0.3, but I hadn't figured out the auto-normalization stuff. That is probably great for the average user, but was clipping my audio, and has a display bug that I haven't figured out how to reproduce regularly. 

(If I drag the line up/down, it doesn't change the values in "Properties".)

I reverted to 19.0.2 but that didn't help.

Maybe that is a design feature, but there is no visual indicator that that feature is turned on, and if you manually have audio perfect before importing, it's absolutely messed up until I figured out the issues with that turned on...

Whoever decided it should be on by default for legacy users, with no visual in the Properties missed the boat from my POV. You simply don't know it's on... and you end up fighting with the audio IF you knew how it all worked in 2018 or earlier.


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DBaarns

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PS: Sorry to be complaining. Overall I really like Camtasia, although I see it's designed for the casual user primarily. Makes sense as the rest of us can figure out how to work around issues if needed.
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Brooks, Camtasia Technical Product Manager

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Auto-LUFS normailization can be turned off per project in the Project Settings. It can also be toggled as a default in the Camtasia preferences. Give that a try. If there's a reproducible bug with sync issues then we want to know about it. Please open a ticket with our Tech Support team. Bugs they find are triaged as part of our normal engineering process.

Brooks
Camtasia Technical Product Manager
Mobile Technical Product Manager
TechSmith
(Edited)
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Fred Grover, Champion

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You beat me to that about the setting on Auto-LUFS Normalization Brooks. Thanks for sharing that information as many new users and some Veteran users do not know where that setting is unless told or showed. You have to admit though for the Pro Audio Users there is a lot of room for improvement on the audio features in Camtasia and SnagIt. Just IMHO.

For example it would be nice to have more than just the typical 44.1 Khz 16 Bit Settings and if it would be more compatible with using Pro Audio Daw Software for creating training videos. Just my suggestions and opinion. I know others have also wanted to see more audio features for the Pro Audio Equipment and DAW Software Users now for many years. Hope something is being looked at for this request and others. Thanks and have a great day.

Regards,

Fred
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Fred Grover, Champion

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Brooks, can you say if they are working on any audio upgrades for Pro Audio Users and for users who have contacted Support and they tell them to post it back here in the Community what is up with that ? Just wondering as some have told me that is what they were told. Cannot TechSmith get their project and diagnostics and take a look into this issue ? Let us know and thanks Brooks.
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DBaarns

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Right with the Auto-normalization, you CAN turn it off although I found it for the project level first, and didn't find it in the global level until the next project. It surprised me it was turned on the next project, but then I realized it was part of the project not a global setting.  (Later I found the global setting in Preferences...)

If someone is a legacy user, it's turned on by default and is a MAJOR change over the way it worked in the past.  (In my mind it shouldn't be automatically on for legacy users -OR- it should have an interface element to tell you something has changed... It's far from obvious.)

I thought I had accidentally changed something on my interface, or that the new version was just much louder. When I added a music track that was already at the proper volume to be BEHIND the voice, it was way too loud. 

I turned down my interface, but it didn't make any visual diff... That put me on a hunt to figure it out.

I spent quite a bit of time trying different things with my sound, since I had it all dialed in for the prior versions.

I did figure it out, but it's because I'm not new to Camtasia, and was searching through the options until I found it as it wasn't helpful for my usage case.

I realize I'm not your standard client in terms of audio, so whatever you do is fine by me.

That said, without any visual in the Properties saying it's on/off someone new doesn't understand why changing their input volume (specifically turning it down), doesn't change the track volume.

The Properties for the Audio track needs an indicator from my POV, but it doesn't matter to me now that I figured it out. All good with it off in my usage case.
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DBaarns

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PS: Tomorrow I have another hour of video/audio to edit and prepare for my eLearning project.

I'll report back on the audio drift. I recorded 3.5 hours of raw materials, and have about an hour of it done so far.

I'll report back on what is happening with the drift stuff, AND see if I can repro the visuals that were out of sync.  Could have been user error, I'll see if I can find something I can reproduce.

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Logan854

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In the event that somebody is an inheritance client, it's turned on of course and is a MAJOR change over the manner in which it worked before. (In my mind it shouldn't be consequently on for heritage clients - OR-it ought to have an interface component to disclose to you something has changed... It's a long way from self-evident.
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DBaarns

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I agree...  You can't tell it's on, and I'm still trying to figure out how the Properties window settings interact.

We have the "Green Line", we have the percentage for audio. I thought when I dragged the green line up/down, it changed the percentage in the older versions, but it's like they are now independent.

I can set the Auto-Normalize, then it ignores other settings, but it isn't obvious that it's even on... And it's clipping some of my audio... I'll document some of that later too...

I not a beginning user and it's confusing, although I've figured out enough workarounds I'm finishing my projects before I invest all the time to document the inconsistencies. (I have another 4 hours of recorded material due over the next week or so.)

I'm editing another 1 hour segment today. At the 45 min mark, the preview audio is quite a bit out of sync with the visuals.

All I've done is ripple deletes about a half dozen times, mostly 10-30 second removals, plus on 5 min ripple delete. The audio is way out of sync. On this one I'm going to wait and render the whole hour after I finish my basic "remove a few more sections" and see if the final render stays in sync even though the preview is so out to lunch.

I'll document all this ASAP, as I know unless it's duplicated there, it can't be adjusted. (It's hard for me to believe this isn't already a known issue...)

I work with an above average amount of pro audio software/hardware, but Camtasia appears to target webcam and/or USB mics, rather than the higher quality gear.

I'm just complaining here because it's an ongoing issue, but I realize until I submit well documented bugs, little is likely to happen.

More news after my projects finish.


(Edited)
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DBaarns

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One other comment: While I haven't yet done a good job documenting my audio issues yet, I did have a great interaction after submitting a tech support ticket... 

The person was very professional, and found a resolve to my issue quickly. 

It was obvious she cared about being helpful and finding answers ASAP. If the rest are like her, it's a great team handling tech issues.