Bug 381153

Summary: Sound crackle when applying bandpass/highpass/lowpass/equaliser/bandstop
Product: [Applications] kdenlive Reporter: svofski
Component: Video Effects & TransitionsAssignee: Vincent PINON <vpinon>
Status: RESOLVED FIXED    
Severity: normal CC: alex0082, fritzibaby, svofski
Priority: NOR Flags: fritzibaby: Brainstorm+
Version First Reported In: 17.04.0   
Target Milestone: ---   
Platform: Microsoft Windows   
OS: Microsoft Windows   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: highpass filter crackle example
Equalizer.png
audio effect list

Description svofski 2017-06-13 12:33:19 UTC
Created attachment 106072 [details]
highpass filter crackle example

Bandpass, highpass, lowpass, equalizer, bandreject (probably others too). These audio filters applied to track or clip cause audible crackling in the sound output. It sounds very regular, some 4 times per second and I guess the period is related to window/buffer size. This defect is present in rendered video too, so it's not only a preview artefact.

OS: Windows 10. Kdenlive 17.04.0, MLT version 6.5.0, ffmpeg-3.2.4-win64-shared.
Comment 1 emohr 2018-10-13 13:23:39 UTC
Please try with the actual Kdenlive version 18.08.2
Comment 2 Vincent PINON 2021-02-14 20:17:21 UTC
Sorry for huge answer delay.
Since then Kdenlive (MLT actually) evolved a lot.
Many known sound crackle have been solved in the past year, please try again...
Comment 3 Alex 2021-03-13 15:34:15 UTC
With the last version (20.12.3) there is no equalizer available !
Comment 4 emohr 2021-03-13 15:53:49 UTC
Created attachment 136647 [details]
Equalizer.png

Type "equalizer" into the effect search field and you should see it.
Comment 5 Alex 2021-03-13 18:42:04 UTC
Created attachment 136650 [details]
audio effect list

In my version (20.12.3) linux appimage and also on windows there is also 8 effects. Maybe you installed also some addons (plugins)