Automatically delete silent sections from audio and video

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  • Idea
  • Updated 2 months ago
  • Not Planned
  • (Edited)
I'd like to have the ability to delete a section of silence that I define, example I want to delete any period greater than 300 ms, both from the audio and video.

Along the same lines I'd like to be use a section of audio (example the speaker says "uh" or "and uh") to delete the audio and video where ever it appears.

I'm in the process of editing instructor recordings of powerpoint presentations thus it is important that the video and audio sections be deleted at the same time. In that the powerpoint slide is static nothing that is necessary will be deleted by deleting both.
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jgt1942

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Posted 7 years ago

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Flipped Classroom

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Thank you Gabe! Seems great! Just what the doctor ordered!

Can't wait to try it. I'll write my comments after testing it.
(Edited)
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Kimberli Kisiel

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+1

I record training classes to be converted to e-learning later. The speaker can easily captivate an audience with body language, eye contact, etc in the room, but all of that is just extra time in the video. My learners have requested that I remove the pauses for efficiency.

I tried the Cockos Reaper solution (thanks Gabriel!) but I'm obviously doing something wrong because instead of deleting just the pauses it deletes the whole thing.

I would love to have an option like this in my Camtasia. (Windows 7, 64-bit)
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brucerothwell

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When Techsmith does add this feature, make sure you provide a way to control the following:

1) Threshhold (how silent the gaps need to be)
2) Minimum gap length
3) Pre-gap "pad" (how much space needs to be retained before the gap)
4) Post-gap "pad" (how much space needs to be retained after the gap)

The 3rd and 4th items (especially the 3rd) are crucial to making sure the syllables do not get cut off.

Also, it needs to be "non0destuctive" to the clips, as expected.

Last, the separate clips need to be pulled from the right automatically, but UNDO on the whole process needs to be an option, once the editor reviews how well the execution was performed.
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brucerothwell

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Another comment:

Perhaps Techsmith can integrate a pro audio editing tool (that also can open video files), that can be launched on a project when the basic audio features are not sufficient.

Adobe eLearning Suite did something this with Audition (in fact, they bought Cool Edit Pro and renamed it). I think Captivate users can use Audition, even without having bought the eLearning Suite.
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Robert R., Online Community Admin

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Official Response
Hi and thanks for submitting your idea/feature request!

As outlined in our New Community Processes post, feature requests are open to voting up through the first, where we will then tally the votes and present the findings to our product teams. To ensure we have the most accurate data, on the 1st of the month we will be locking the threads that were listed in the Feature Request Round-up that was posted on the 15th. Once we have reviewed the submitted feature requests, our product team(s) may respond to the request, and if that is the case then that thread will then be unlocked for further discussion.

In the event that your idea is not selected for a response feel free to resubmit the idea and share it with your colleagues to garner as much exposure as possible!

Thank you again for your idea and we look forward to hearing more from you!

-Robert
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Kimberli Kisiel

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Hi Robert,

Thanks for this information. I'm only just seeing this, so too late for the feature request round-up from 3 months ago. Can you let me know if this feature is being considered for development? If not, can we get it in the next feature request round-up so that I can try to garner votes for it and move this along?

Best regards,
Kimberli
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kayakman, Champion

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2 years ago I posted this in response to this "idea"

although an interesting concept, it could have unanticipated consequences ...

Although an interesting feature request, I cannot see how it could be implemented in code in such a way that did not create more editing work and problems than it addressed

many captured silent sections in narration reflect deliberate pauses in speech to allow some screen action to take place [which needs to be in the screencast], or, if there is too much time between spoken words, trimming to almost no space would destroy the natural rhythm of the narration [and no spaces in the narration would sound unnatural]

I do a lot of narrated screencasts, so, like others, I have to do a lot of timeline cuts to adjust, but not eliminate, the duration of the dead spaces

for me, a more useful enhancement would be a keyboard navigation shortcut that would advance the playhead to the beginning of the next dead space, so I could then decide what to do; I find that to get best results, I have to address each dead space on a case by case basis

I personally would not want the app to do my thinking for me
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Matt Pelletier

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There would be parameters to this type of filter to control the amount of silent time that is eliminated and what level of sound qualifies as silence.  Often the natural rhythm of the speaker is too slow anyway.

We use Camtasia all the time to record and produce webinars.  The speaker is expert on their topic, but not at speaking.  They often pause to prepare another part of their presentation, switch applications, read a question, etc.   For this level of recording we cannot justify detail editing.  We take the time to find the major silences only.  A dead space reduction tool would be an easy way to do better than this. 

When I record myself speaking while demonstrating software, I often need to pause to gather my thoughts, then resume.  This results in a number of silent spaces.  I personally almost never leave a dead space in the audio where the only thing happening is a cursor moving.  A reduce silence tool, with adjustable parameters, would remove a lot of my editing work.

I also like the idea of auto-advancing to the next point of detected silence on the timeline.  This could be part of the same tool.  Audio editing software has had both of these features for decades.
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Nick Beser

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Matt, I record lectures for my on line graduate classes at Johns Hopkins University. I use the same approach, talk to the chart, add my comments, think abit to see if I forrgot anything (consult my notes, etc), and then transition to the next chart. There are silences all through the talk that must be edited out.If I can do this automatically, it would speed the process. While I don't want the program to go in and delete, it would be helpful if it could automatically select the region, and give me the option to delete.
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Robert R., Online Community Admin

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Hi all;

While I cannot say with certainty that this function will (or will not) be added to Camtasia, I can say that we are looking into improving how we handle audio editing and a function like this seems like it could be a sure win (though problematic if you include a webcam / 'talking head' or any real motion on screen, as the impact of deleting content could be incredibly jarring). Though this is a bit of a non-answer, and for that I apologize, but I would say "Stay Tuned" as we are looking to provide a better experience when it comes to the audio editing in Camtasia.

-Robert
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ygranja

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Hello TechSmith, I have been thinking about this audio effect, which is the opposite of the currently Noise Removal in Camtasia Audio Effects. Why don't you add this new audio effect, to automatically and precisely remove unnecessary silence at the beginning and end of an audio track? This effect would be useful especially when recording music.
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jgt1942

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If you like this idea, please click on the Vote button at the top right side.

BTW - I could not sign-in using Chrome, I had to use Opera
(Edited)
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Flipped Classroom

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How many votes are needed for the feature to be added to Camtasia?
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jgt1942

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I highly suspect it depends on how many votes it receives and how huge the effort is. Example let's say that suggestion number 73 receives 100 votes and this suggestion receives 99. If the waiting factor is based only on the number of votes then suggestion number 73 would win. When I managed teams a lot of other factors as well as the voting played a big role in determining was was going to be in the next release. I suspect that TechSmith uses what we call traditional  waterfall development rather than Agile development. IMHO Agile is much better and you get more and better output for the same dollars.
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Margarita Sheshukova

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It would be extremely useful!
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jill

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I need this feature, too! If other software companies can do it--so can YOU Camtasia!!! 
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leipzig

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Time to implement this
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Doug Wulff

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I had the same problem. So I built a software to delete dead air with a couple clicks. 

TimeBolt automatically removes silence from video and audio files. Look at a graph, set audio level and split-time, hit run. The cuts are automated, and recompiled back into a single MP4 or MP3 file.

Simple as that. Get for both Mac and PC. TimeBolt Silence Trimmer


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davemillman

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Doug,
I edit dozens of audio interviews per year, so I absolutely understand the issue you designed TimeBolt to solve.

However, when we spend 5 hours to edit an hour of audio, we invariably cut it down to maybe 10-20 minutes. This means deleting all the false starts, ums, repetitive content, and usually the interviewer as well.

So cutting the dead air is a good start, but maybe not a complete answer for the 5 hour folks. Your thoughts?
(Edited)
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Doug Wulff

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Dave,
I agree TimeBolt is not a complete click a couple buttons AI editor (yet ha). It takes me 4-5 hrs to delete just silence by hand for every one hour of show. I think of TimeBolt as a pre-processor to trim the fat, before you cut the steak. 

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Matt Pelletier

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Will TimeBolt take a native camtasia TREC file or would I have to produce it as MP4 first?
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Doug Wulff

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Matt, it requires an MP4 
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paulwilliamengle

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Doug, your MP4 answer was clear, but for folks willing to open the .TREC file to abandon the cursor data and just get the AVI, any plans to work with AVI files.
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Doug Wulff

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Hi Paul, I will put AVI into a future roadmap but we do not support yet. Thx for question / suggestion. 
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Matt Pelletier

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Doug, I purchased and used it.  It was successful but I have questions.
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Doug Wulff

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Matt, 
Excellent...thx for your support :) 
How can I help?
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Matt Pelletier

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Well I didn't want to get into it too much on the forum, but I will.   What is the strategy for adjusting the levels?  The help leads to a page on "electron" https://github.com/electron/electron/tree/v6.0.10/docs#readme so essential there is no help.  There are only 2 settings but no indication on how to adjust them.  I tried many settings using a short clip from my video.  With the time 0.3 I adjust the level up a little from default and it does a good job of removing short silences.  But it leaves long silences.  I can get rid of the long silences with other setting combinations but not both short and long.  Setting the level high enough to get rid of short and long silence clips off the end of spoken words.

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Doug Wulff

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Matt, please let me know if this tutorial video helps. I believe the issue is volume threshold. I've never used anything above a .014 or below .008. My personal email is doug at clickyet dot com.

(Edited)
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jy

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Following this as well. Would be a really useful feature for Camtasia.