Contributing to Kdenlive

[johnar1]

Mostly mp4 or webm x264 video source with aac or mp3.
I have already unsuccessfully tried that.

When your project profile is 60FPS and you switch two 25FPS mid-project, the audio gets multiple silent/blank portions in between when you render it, missing whole portion of the source. I guess because it pertains to the individual amount of frames, which is obviously only half. So I it's not just that I could simply edit those blank parts out, unfortunately.

Is there a way I could get 60FPS slide transitions while using a 25FPS profile, or export the audio for 25FPS without it completely breaking

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On August 23, 2018 6:17 PM, Vincent Pinon <vpinon at kde.org> wrote:

> 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.
>
> Sent with [ProtonMail](https://protonmail.com) Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>
> On August 22, 2018 10:44 PM, johnar1 <johnar1 at protonmail.com> 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!
>
> Sent with [ProtonMail](https://protonmail.com) Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>
> On August 22, 2018 6:00 PM, Harald Albrecht <harald.albrecht at gmx.net> 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,
>
> Harald
>
> -------- Ursprüngliche Nachricht --------
>
> Von: Steve Brodie <stevebrodie at gmail.com>
>
> Datum: 22.08.18 17:40 (GMT+01:00)
>
> An: kdenlive at kde.org
>
> 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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