Contributing to Kdenlive

Vincent Pinon vpinon at
Thu Aug 23 17:17:41 BST 2018

What is your audio source format (container) and codec? If not already the case, try to use WAV audio (pcm_s16le).
You can also export video only at 60fps, audio only switching to 25fps, and then remux together with FFmpeg?

Le jeudi 23 août 2018, 17:18:48 CEST johnar1 a écrit :

Hey guys!

Small update:

Compiling the latest git of ffmpeg did not help unfortunately, also converting the audio to 48khz did not work.

The only way I have been able to get rid of all audio pops in a 5 minute video is by changing the project profile from 59.9FPS to 25FPS or lower.

I am now convinced that it is actually the frame rate of the video that is at fault.

Now I use a lot of slide animations which I would like to be rendered at 60FPS in order for them to appear smooth.

Is there any way I can export the audio with 25FPS pacing, but still be applicable to a 60FPS source?

I am out of ideas, unfortunately.

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On August 22, 2018 10:44 PM, johnar1 <johnar1 at> wrote:

Hey Steve and Harald, thank you for your input!

I typically use up to 30-40 clips for one Youtube Video, which I upload daily.

You can check out the channel if  you'd like, it's "UFC Digest".

Upsampling them to 48khz would be a pain, but I will try a couple upsampled test clips just to check if the pops go away.

Right now I have compiled the latest version of ffmpeg git and I am rendering with different profiles and in different formats. 

I have read on the kdenlive forum that ffmpeg audio thumbnails could be related, seeing as many users have reported the same issue, but a solution was never found.

Since Eugen specifically mentioned ffmpeg as the source of the problem, I will  make sure to test every possible ffmpeg related scenario, before I move to the next workaround.

Thank you all again, for your great insights!

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On August 22, 2018 6:00 PM, Harald Albrecht <harald.albrecht at> wrote:

second the 48kHz suggestion. early on I noticed issues with 44.1kHz, switched to 48kHz and had no audio issues anymore, but then I stick with 25fps. use audacity to upsample.

best regards,


-------- Ursprüngliche Nachricht --------

Von: Steve Brodie <stevebrodie at>

Datum: 22.08.18 17:40 (GMT+01:00)

An: kdenlive at

Betreff: Re: Contributing to Kdenlive

Do you guys have any idea how I can keep exporting the video at 59FPS and still solve the audio/out of synch issue Eugen spoke of?

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