Openshot-qt: Audio popping & crackling in exported video with overlaid audio tracks.

[supercarl620]

Windows XP
Openshot version 2.4.1

I made a video of a motorcycle race that I'm trying to overlay an audio file on of race commentary. I have it all setup in openshot and it previews fine. However when I try to export the video, the audio gets really terrible whenever there are two audio tracks overlaid on top of each other. for instance, at the start of the video when there is just the commentating audio track, it sounds great. But when the race starts and there is commentating audio on top of the race audio of the bikes, it starts popping and cracking really bad. The audio is all distorted. I've tried to export the video in different formats to no success. At first the exported video had no sound at all, but I fixed that by changing the audio codec from ac3 to aac. but both codecs deliver the same terrible audio popping/cracking. can anyone help please??

[basklein]

I'm having the exact same issue on Windows 7, Openshot version 2.4.1 and version 2.4.0 before that.

[osve001]

Windows 7
Openshot 2.4.1

I'm afraid I'm suffering the same problem. The video recording is perfect (no crackling at all). No other audio track but the one in the original video (video game recording with comments on the go from Android tablet). When playing back the project, the sound crackles and, what's worse, the crackling remains in the exported video. I think that the problem begins when importing the video.
Any ideas? Thanks in advance.

[supercarl620]

Thats different than my problem. I would agree it probably arises when
importing or converting the video. My audio issue happened when overlaying
two audio tracks and I fixed it by reducing the audio volume of each track
to 50%. then when I exported the video it sounded great. Good luck!

On Tue, Jan 9, 2018 at 12:42 PM, osve001 [e-mail] wrote:

Windows 7
Openshot 2.4.1

I'm afraid I'm suffering the same problem. The video recording is perfect
(no crackling at all). No other audio track but the one in the original
video (video game recording with comments on the go from Android tablet).
When playing back the project, the sound crackles and, what's worse, the
crackling remains in the exported video. I think that the problem begins
when importing the video.
Any ideas? Thanks in advance.

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[osve001]

I've tried Windows 10 and Ubuntu 16.04. The same problem. Then, I extracted the audio (soundtrack) from the video (that's to convert it to mp3) and added it to the Openshot project. I muted the video and ... It works fine, the audio is perfect (no crackling, as in the original recording).
So my conclusion is that there could be a problem with the audio when importing the video.
I hope this helps.
Thank you.

[DylanC]

@supercarl620 - Does the popping happen in the latest daily build? I think a fix was added for audio popping.

[DylanC]

@supercarl620 - Oh I just saw this was as a result of the volume levels.

[cptX]

I can verify that this issue is still present in the following configuration:

i7 6700k 32GB RAM
Linux Mint 18.3
OpenShot Version: 2.4.1-dev1

Cracking is audible both in playback inside the program and in the exported file.
Volume value has no effect on the result (tried values from 0,5 to 4)

[peanutbutterandcrackers]

A Linux user also having an issue with OpenShot. We are in deep waters here...

Perhaps I should also try to see if I can recreate this...

[cptX]

Update: I used another Camera which probably encodes differently and I didn't notice any cracks this time... Looks like cracks depend on the format. Or is something like buffer dependent in the program ...

[DylanC]

@cptX - Do you have details on the video format that does cause the cracks?

[cptX]

Hi guys, the video format that caused the cracks is:
Video Codec: H264 - MPEG-4 AVC (part 10) , Resolution: 1280x720, Frame rate: 20
Audio Codec: MPEG AAC Audio (mp4a) Stereo, Sample rate: 48000 Hz

It was recorded with a mobile phone but the original video has no cracks. in Openshot cracks are audible both in preview and in extracted video.

[peanutbutterandcrackers]

@cptX - There was a recent commit that had something to do with fixing audio pops. So, could you please try out the latest daily build and see if that works, please?

[DylanC]

@supercarl620 - Can you give a daily build a try? @peanutbutterandcrackers has the link above.

[cptX]

Cracks in sound happened again in latest development version in Linux Mint 18.3.
Unfortunately openshot crashed completely and cannot start again, even after a restart (see issue https://github.com/OpenShot/libopenshot/issues/81)

I think the problem started when I shifted the video and the sound from one track to another. The sound started having cracks untill the whole application crashed forever...

Going back to openshot 1, as it is the only stable.

By the way, in the latest dev. version looks like autoaligning of the clips is not working...

[peanutbutterandcrackers]

@cptX - could you please follow this guide and attach the logs so that the devs can help you, good sir? Thanks! [And sorry for the inconvenience, too.]

[fabrixx]

Same issue for me in daily build & flatpak version with Arch Linux

[Neubivljiv]

Just to confirm...i have same issue. Audio is crackling every time.
I am using the latest version on W10.

[synogen]

Can confirm this issue, OpenShot 2.4.1 64 Bit on Windows 7 x64.
The audio becomes slightly scratchy in parts as if oversteering the volume, but the only actual audio effect I'm using is a standard slow fadeout for one of the tracks.
Output audio codec does not seem to matter, and I checked that the input files are fine as well, My guess is that it is the way OpenShot mixes several overlaying audio tracks together.

[synogen]

As far as I can tell switching to OpenShot-v2.4.2-rc1 from the Daily section of https://www.openshot.org/download/ fixed it for me. I can not hear any more distortion even at higher volumes in the videos reencoded with that version.
Thanks for the hard work devs and sorry for spamming your issue tracker with an unneeded bug report from my side :-).

[DylanC]

@synogen - Yep, it should be fixed now. Thanks for confirming. @supercarl620 - Can you try the same build for us too?

[fabrixx]

OpenShot-v2.4.2-rc1: from a continous popping sound now i have low level popping only for 4_5 seconds rapidly decreasing and finally fixed preview and usability on Linux.

[peanutbutterandcrackers]

@fabrixx - Awesome! The code/formula used to remove the pops is still quite simple (according to the commit message); perhaps a new formula would soon be found that will fix this completely, soon. :+1:

[steinybot]

Just tried 2.4.2 RC5 on Windows 10 and the cracking has gone! ... but now it crashes when fading out one audio clip and into the next on the same track.

[steinybot]

It actually hasn't gone completely. There are still cases where there is a single "pop" just after going from one video to the next. Both video clips have audio set to 0 and the only coming from the separate audio track.

[steinybot]

@peanutbutterandcrackers can you please point me to the commit that fixed this? I may take a look to see if I can improve it.

[peanutbutterandcrackers]

@steinybot - Here is the latest commit with regards to this issue. It does need some more polishing up. Perhaps some new mathematical formulae? This was the first attempt, that I am aware of, to deal with this sort of issue. Glad you're going to help out! Welcome to the team, good sir! And all the very best!

[Grayswandir]

Hello, I have the same issue, few crackling sound only when audio track is mixe with audio from a clip video. Not all the video, but only when you have the two audio source activated.
Openshot version: appimage (linux/debian/64bits), 2.4.2 (should I test the daily version?)
Audio track: Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 143 kb/s
Audio video (gopro): Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
++

[DylanC]

@Grayswandir - I would recommend to try the daily.

[Grayswandir]

Ok, same issue (maybe less crackling noise) with this version:
OpenShot-v2.4.2-dev1-1533381027-d28a7ef8-554d9f2f-x86_64.AppImage
I will try another one

[fabrixx]

You are working at 60fps?

Il mar 7 ago 2018, 09:16 Grays [e-mail] ha scritto:

Ok, same issue (maybe less crackling noise) with this version:
OpenShot-v2.4.2-dev1-1533381027-d28a7ef8-554d9f2f-x86_64.AppImage
I will try another one

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[Grayswandir]

No, 23.98 fps, but if needed, I can test with different fps.
hd720 for the output.

[supercarl620]

Reduce sound level on both clips to 50% and crackling will go away

On Tue, Aug 7, 2018 at 4:02 AM, Grays [e-mail] wrote:

No, 23.98 fps, but if needed, I can test with different fps.
hd720 for the output.

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[Grayswandir]

Ho yes :) Mixed sound is fine now. But sound need to be reduce on the 2 clips. I will test with different lvl, but 50% is fine. Do you have an explanation? Just to understand why it works with 50% and not with 100%.
On debian/openshot 1.4.3 version, mixed sound worked fine.

[supercarl620]

No explanation. Just a fix I was told by the openshot developer team for
the same issue when I had it a while back.

On Wed, Aug 8, 2018 at 7:13 AM, Grays [e-mail] wrote:

Ho yes :) Mixed sound is fine now. But sound need to be reduce on the 2
clips. I will test with different lvl, but 50% is fine. Do you have an
explanation? Just to understand why it works with 50% and not with 100%.
On debian/openshot 1.4.3 version, mixed sound worked fine.

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[Grayswandir]

My tests:
70%|70%: sound is fine
80%|80%: sound is crackling
Ok, so if it's a fix, and as it's not the same behavior than the last version, we will need to add this tips in the user guide :)
thanks for your help ;)

[nigels-com]

So 50%/50% is "safe" (never clips) but 70%/70% might be fine, depending on the clips, but you only know if you listen carefully in ideal conditions? (No kids squabbling in the next room at the wrong time)

For three layers of audio we go to 33%/33%/33% to be safe?

[teenagechef]

I just started using openshot and loved it at first. Edited my video no problem. Just making a fan video with clips from a show i like. I then tried to export it and i get this weird almost robotic and scratchy sounding audio in several parts both during preview and after exporting. Tried adjusting the volume level on the clips like someone suggested. Still no good. Any suggestions?

[acal]

For me this happens even with a single mp4 with it's own audio (not a separate track). It also can be heard in the preview, not just the exported version. The original roll is clean.

[The-Game-Sage]

This for me is more like all audio is scrambled and sounds more like someone holding a vacumme hose to your ear and running something along the coils in the hose.

I have windows 10 and using version 2.4.3 Basically I cannot use any sound what so ever. Is there a way to roll back to a version where sound worked?

[The-Game-Sage]

I have this issue when after exporting a video, for the next 7 days the sound is nothing but static on all tracks. This is both in preview and the exported product.

[SubsidedLemon]

I tried literally everything here in this topic. I tested with this version as mentioned:
https://github.com/OpenShot/openshot-qt/releases/download/daily/OpenShot-v2.4.2-rc1-x86_64.exe

The issue persists. I have zero clue how to fix this.

[brysont]

Just adding into this.

Windows 10 Home 64-bit
AMD Ryzen 7 2700X (8 core, 4.00GHz)
32GB DDR5 RAM
NVIDIA GeForce GTX 750 Ti
OpenShot v2.4.3

Videos are 1080p action camera footage, all of which preview with crackling and popping. Actually, had the profile set to 1080p @ 60fps and the audio was skippy, video smooth on preview. Export was pristine. Then I read an old issue on here recommending 720p @ 30fps; audio got less skippy, more crackly, and the video got skippy too in preview. Exporting that last setup right now to YouTube-HD profile ... video came out mostly smooth, but has several spots where the editor introduced choppy and even frozen video (audio is good throughout).

[dadkins1]

I had a similar problem where the imported audio would cut out repeatedly in the timeline and exported video. To work around it, I exported the video without audio and then added the output to a new project; the audio sounded fine. (In the new project, I imported the audio first. Not sure it makes a difference, but that's what I did!)

[fabrixx]

But with double exporting there is not a double quality loss?

Il giorno lun 21 gen 2019, 04:15 dadkins1 [e-mail] ha
scritto:

I had a similar problem where the imported audio would cut out repeatedly
in the timeline and exported video. To work around it, I exported the video
without audio and then added the output to a new project; the audio sounded
fine. (In the new project, I imported the audio first. Not sure it makes a
difference, but that's what I did!)

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[dadkins1]

I didn’t notice any degradation of quality.
Even if there was, it was still better than having crackling audio. :)

On Jan 21, 2019, at 1:39 AM, fabrixx <[email protected][e-mail]> wrote:

But with double exporting there is not a double quality loss?

Il giorno lun 21 gen 2019, 04:15 dadkins1 <[email protected][e-mail]> ha
scritto:

I had a similar problem where the imported audio would cut out repeatedly
in the timeline and exported video. To work around it, I exported the video
without audio and then added the output to a new project; the audio sounded
fine. (In the new project, I imported the audio first. Not sure it makes a
difference, but that's what I did!)

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[raupes]

Any fix or workaround yet?
flac audio files combined with flv video files. just crapy sound given ;(
Version 2.4.3 on Win10

[LetsGoDude]

still have the same problem :( pls fix it finally. i can´t publish videos with that crackle. :-1:

[The-Game-Sage]

The thing that seemed to fix it for me was unplugging my headphones when
the program opens and leaving them out when using the program.

On Sat, Jan 12, 2019 at 1:00 AM SubsidedLemon [e-mail]
wrote:

I tried literally everything here in this topic. I tested with this
version as mentioned:

https://github.com/OpenShot/openshot-qt/releases/download/daily/OpenShot-v2.4.2-rc1-x86_64.exe

The issue persists. I have zero clue how to fix this.

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[ReinierPlezier]

After reading all suggestions I converted my MP3 music files to AAC format and the cracking in my final videos were gone! Thanks

[Polda18]

I can confirm this issue with OpenShot on Windows 10 64bit, too. It's super annoying and I can't do anything about it, except perhaps decrease the volume of each tracks before exporting in order to avoid crackling of the audio. The issue is that the source videos have quite loud audio (but not loud enough to crackle), but I guess that the export ignores any level beyond 0 dB, so it mutes these portions - that makes crackling sound, because it distorts the exported waveform. Not to mention unbeliveably bad performance of preview playback when there are multiple of tracks and multiple of layers. Makes the editing especially painful.

[JosefJ]

Thanks @Polda18 - lowering down volume of the sample to 50% actually helped

[BsdbabdsaBOp]

I need help have this issue too. The crackling sound has gotten onto all of my video files on my hard drive.

[ferdnyc]

I need help have this issue too. The crackling sound has gotten onto all of my video files on my hard drive.

@BsdbabdsaBOp That sounds like a hardware/driver issue, nothing to do with OpenShot. It doesn't make any changes to any of your existing video files, only the ones you create by using the Export feature.

[sWoifal]

Can confirm the problem exists on Ubuntu too (tried on 18.04, 18.10, 19.04) and on different underlying hardware (multiple systems).

[stolk]

Latest dev build still pops for me:

OpenShot-v2.4.4-dev2-1568687222-f8c180c1-f17a7ed4-x86_64.AppImage | Sept. 16, 2019, 4:28 p.m.

I mix a music track and videos with sound track.

UPDATE
Crackles go away if I lower the clip volumes. I now use 0.7 for my music track, and 0.5 for my video tracks.

[toonjoey]

Just recently started editing a video, and it seems the problem both still exists and can happen in the editor. I can upload the sound that causes the issue if needed.

Edit: Going to upload it here anyway, just in case someone needs it. https://ufile.io/r6yv198t
Edit 2: Exported it and now the audio seems to clip even more, even without the sound effect.

[mpupovac]

I have the same issue. Just started using it, but the exported video is terrible. Not much of a product if you ask me.

[Grayswandir]

Hello, do you try the tips lowering down the voume to 50%? Works fine for me and some users.

[sWoifal]

I tried different volume mixes and even (from another thread about this topic I think) to make multiple video channels not overlap. Sometimes it works but sometimes not. As you can see only after exporting - which takes quite long - this is very frustrating.

I love the editor but had to switch to another editor for now. Will happily come back and try again as soon as those issues are resolved.

If there is any way I can help in resolving this issue I am very happy to help!

PS: The main reason why the mentioned workaround - even if it would consistently work all the time - is a no-go in my videos for me is, because if you set 50% volume on both video and audio channel, the resulting overall audio volume of the final clip is 50%

PPS: I am also following https://github.com/OpenShot/openshot-qt/issues/1911 which is a duplicate but still in active discussion.

[mathieugoodman]

Any updates on this? I've had this issue for every video I edit in OpenShot so far. It's incredibly frustrating as there doesn't seem to be a consistent solution for it.

[DaveM11]

There is no solution for this. Switch to DaVinci Resolve.

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On Mon, Oct 14, 2019 at 2:11 PM mathieugoodman [e-mail]
wrote:

Any updates on this? I've had this issue for every video I edit in
OpenShot so far. It's incredibly frustrating as there doesn't seem to be a
consistent solution for it.

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[toonjoey]

There is no solution _currently_. That doesn't mean the solution will never exist. The bug is known, and from what I've seen it has many issues created specifically for it.

[stolk]

Any updates on this? I've had this issue for every video I edit in OpenShot so far. It's incredibly frustrating as there doesn't seem to be a consistent solution for it.

There is a work around: lower the volume for the audio tracks.
The issue is caused by exceeding the max value when adding channels together.

[DaveM11]

There are issues created for this bug going back over a year+. Take what
you will from that.

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On Thu, Oct 17, 2019 at 9:19 PM Bram Stolk [e-mail] wrote:

Any updates on this? I've had this issue for every video I edit in
OpenShot so far. It's incredibly frustrating as there doesn't seem to be a
consistent solution for it.

There is a work around: lower the volume for the audio tracks.
The issue is caused by exceeding the max value when adding channels
together.

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[masonmaeder]

This is still an issue today, two years after this was brought up. It is easy to lower the volume of the tracks, but it doesn't seem too hard to patch and would be a nice quality-of-life thing. Please fix.

[mikelacsa]

The same issue was raised in 1911

[GMartigny]

Check this video if you still have a weird crackling sound on preview.
This is due to your profile not matching your speaker options.

[mkarg]

Check this video if you still have a weird crackling sound on preview.
This is due to your profile not matching your speaker options.

That video solves a different issue (original audio tracks crackling in preview).

What this issue is about is overlaid tracks crackling where the preview of each track does not crackle.

[toonjoey]

Actually, I _did_ have crackling issues in preview as well (did I mention that? I don't think I did). It was much less pronounced than the crackling in the final rendered video too.

[mkarg]

I noticed that the popping and cricklying happens for my overlaid audio only when the video is "RAW AVI". It is completely gone after converting all footage from "RAW AVI" to "H.264 MP4". While the audio is perfect then, this unfortunately implies small compression artifacts in the video.

-     "vcodec": "rawvideo",
-     "video_bit_rate": 745756750,
+     "vcodec": "h264",
+     "video_bit_rate": 9531029,

It would be great if someone of the core team could chime in to fix it, as it is a real pain to "double-render" gigabytes of footage.

[toonjoey]

I remember the issue I had affected _all_ formats, actually.

[mkarg]

I remember the issue I had affected _all_ formats, actually.

Did you have that in 2.4.4 really? Can only reproduce with AVI RAW.

[toonjoey]

I don't remember. I haven't used this software in a while so my memory is hazy.

[DavidAhlers]

I shot an hours worth of video using the 1920x1080 60fps settings on a GoPro Hero Black 7. I wanted to fade from one clip to another. Wherever the clips overlap, there is crackling and popping on the audio both in preview and final render.

I also have popping in random spots in the clip on preview that is not present in the source audio or the rendered version. And whenever I first start playing a clip in preview there are often 1-3 pops as the audio starts up.

I reduced the volume to 50%, and the problem is less noticeable, but clearly still present. I also tried a quick fade down/up between clips, no help. I tried separating the audio into it's own track. Note that when I separated the audio, both video and audio playback was much worse with more popping, presumably because of CPU limitations. So difficult to test whether a separate audio track would have helped on final render as I didn't want to do another render when the editor was unusable with the separate audio track.

I'm running 2.5.1 on a dual core I7 proc with 16gb of RAM. I have not found a workaround, and have spent hours on it already. I'm going to have to switch to other software.

[nigels-com]

@DavidAhlers Could you mention the OS and the sound hardware and interface being used?

[supercub]

I had the same crackling issue when overlaying two audiofiles and could almost get rid of this by setting the 'volume mixing' property of both files to 'Reduce'.
Btw. i use Openshot 2.4.2 (Linux)

[SuslikV]

Fix is pending: https://github.com/OpenShot/libopenshot/pull/466

[sangaman]

I'm using Openshot 2.5.1-dev2 on PopOS 19.10. I get several short, very loud pops and crackles when having one clip at volume 3.0 over a background music cli with volume 0.1. The pops seem to happen most when the 3.0 track is playing relatively louder, every 15-20 seconds or so. Dropping the volume from 3.0 to 2.0 makes all pops seemingly go away.

[mkarg]

I'm using Openshot 2.5.1-dev2 on PopOS 19.10. I get several short, very loud pops and crackles when having one clip at volume 3.0 over a background music cli with volume 0.1. The pops seem to happen most when the 3.0 track is playing relatively louder, every 15-20 seconds or so. Dropping the volume from 3.0 to 2.0 makes all pops seemingly go away.

Did you use the dev build containing fix #466?

[DarrellJonsson]

Initially I had problems with audio crackles & pops -- rendering with Openshot 2.5.1.
I'm using Linux/Ubuntu, removal of Pulseaudio and other tweaks did not make a difference.

Loading the original clips into Audacity though could see tiny spikes in the clips that were inaudible in the previous listening environments I'd played them back in. Using Audacity there are various easy methods of normalizing/limiting/equalizing/cleaning spikes up. At first used Audacity Amplify to drop the levels to somewhere below -5 to -6 along with Audacity click removal -- reloaded the clean clips and from there was able to get clean output with Openshot.

These source clips admittedly had a wide dynamic range in an challenging mix that included acoustic [marimba] and electronic [analogue Radio Shack Moog and digital piano].

The highest cleanest dynamic range I was able to get was using was by using a trial version of T-Racks 5 which like other 'mastering' software has an agenda to pump up audio as loud as digital CD quality audio can go.

It seems now though prep by normalizing/limiting/equalizing/cleaning audio (using Audacity or other audio editing/"Mastering" software ) is getting clean sound out of OpenShot, I'll need a few more experiments to though to fully qualify this.

I'm not a professional digital audio technician, and haven't drilled into the backend of Openshot to see what components its made of. - Perhaps others can comment similar experiences.

[fabrixx]

The bug in my case concerns a constant noise that seems independent of the
volume and occurs only after transitions, apparently randomly.

Luke in thus my video at 3:55
https://youtu.be/FoMvpeb8hJk

This at 03:40
https://youtu.be/55OPM62Dj0Q

This at 01:46
https://youtu.be/OKtSMsM-BYM

This at 01:14
https://youtu.be/PrW9BWRc9Ko

Unfortunately, I realized it too late and it was impossible to re-edit them
with other software. In the playlist the sounds appear continuously I have
chosen only a few random examples.

Il lun 11 mag 2020, 14:04 mwiz17 [e-mail] ha scritto:

Check this video
https://youtu.be/OiqnT8CPDUA http://url

Hopefully can help

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[SuslikV]

@fabrixx the fix available for daily builds, the v2.5.1 has no this fix included.

[fabrixx]

And what is the fixed version?

Il mar 12 mag 2020, 19:39 SuslikV [e-mail] ha scritto:

@fabrixx https://github.com/fabrixx the fix available for daily builds,
the v2.5.1 has no this fix included.

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[mwiz17]

https://youtu.be/OiqnT8CPDUA

Hopefully can help. I recommend the second step on that video tutorial

[SuslikV]

@fabrixx

And what is the fixed version?..

any build that is based on _develop_ branch but not earlier than 27 Mar 2020.

[ctsdownloads]

Just a reminder, I personally set my project audio sample rate to match the source video audio sample rate. So if your source video is 48000, I'd try setting your OpenShot profile to match that sample rate. Should help with some of the audio issues. Usually helps a lot with keeping audio in sync for example.

Additional things to remember is when you record your source video (Webcam, OBS, whatever), don't have your mic turned all the way up only to reduce volume in post-production. For voice, I generally use my mics at 75% at the highest. This can help prevent clipping, etc.

[Kresh0]

It seems that this problem happens when two audio tracks are overlayed. Easy workaround is to export the video with only one layer of sound and then load it to a new Openshot file and add another layer of sound. Hopefully this makes sense.

[fabrixx]

I think with double rendering there is a quality loss

Il gio 28 mag 2020, 02:00 Kresh0 [e-mail] ha scritto:

It seems that this problem happens when two audio tracks are overlayed.
Easy workaround is to export the video with only one layer of sound and
then load it to a new Openshot file and add another layer of sound.
Hopefully this makes sense.

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[mkarg]

This "easy workaround" might be acceptable for short and simple videos, but when using lots of audio tracks (trailer, mood background, voice over, SFX, ...) and particularly with videos longer than few minutes, this workaround is definitively not feasible.

[martinlabarthe]

my preview goes fine, the output file is a mes, found so far two solutions:
https://youtu.be/cCKWVPOhTyU

will be updateing soon.

[RobertQuickert]

I have the same issue with version 2.5.1 running on Windows 10 Home. Just two tracks: one video track (.mov, audio is encoded with AAC, sample rate 48000, stereo (2 channel); the second track, an audio track (mp3, encoded with mp3float, sample rate 48000, stereo (2 channel). Worked around issue by importing audio from the video into Audacity and mixing there, then adding that as the audio track and reducing the volume of the video track to zero. Problem solved, at the expense slight reduction in quality of the sound of the piano, which was the video recording.

[SuslikV]

@RobertQuickert
_Daily Builds_ of the OpenShot (not recommended for production, just for tests):
https://www.openshot.org/download/#daily

Custom build (not official):
https://github.com/OpenShot/openshot-qt/issues/3383#issuecomment-638020348

[Where44444]

I had the same problem, having video with audio and having background music in a track below, I had crackling in audio in the exported 1920x1080 60fps video mp4 (h.264). I changed Volume Mixing for both to "reduce" and volume for both to 0.5, it drastically minimized the popping.

[john-schnake]

For me, the popping/crackling goes away when I export as mpeg4 instead of h.264. Openshot 2.5.1; Ubuntu 20.04.

[cpu2910]

I had the same problem, having video with audio and having background music in a track below, I had crackling in audio in the exported 1920x1080 60fps video mp4 (h.264). I changed Volume Mixing for both to "reduce" and volume for both to 0.5, it drastically minimized the popping.

Changing the Volume Mixing to 'Reduce' does the trick for me.

[BlinkRyba]

I have been having this issue for a while, and it used to only happen when i edited a song to fade or reduce, once done it would crackle after export but wouldnt ever crackle on preview. i am testing right now as no matter what i did it would crackle, ive reduced a song which is playing over my video's to 40% and we will see if it crackles still. Update: reducing to 40% with no fade reduced the cracking to an comfortable amount, not completely gone but still there in some spots. on latest build on i5 processor 16gb ram and so on win 10.

[captkj]

FYI...I was having this problem when rendering in 1080p (29.97 fps)...which was set as my default. Once I changed it to 1080 (30 fps) it worked w/ little to know popping. I was surprised, but thankful!

[AndreOe]

Changing the Volume Mixing to 'Reduce' fixes the issue when there are 2 tracks providing audio. When there are 3 tracks with audio in parallel the crackling is present. Is this a bug or is selecting 'Reduce' for 3 tracks in parallel not physically meaningful?

[AndreOe]

Probably related to https://github.com/OpenShot/openshot-qt/issues/3256