Apologies if this has been answered elsewhere - I've had a fair look but can't find the answer. I'm using AppImage 22.04.2 on Ubuntu 22.04LTS and all seems fine and dandy but my question is:

How to I get Kdenlive to NOT adjust the frame rate of a clip of, say, 59.97fps to the project rate of 23.98fps?

In other words, I want Kdenlive to handle each and every frame of the original clip as a frame in the final render so that, in this instance, the clip ends up as playing at about 40% of normal speed.

With thanks to all of the developers of this great bit of software, and to anyone who can give me some useful help on this.

you have to start a project with the original frame rate of the clips.

bartoloni wrote:you have to start a project with the original frame rate of the clips.

Sorry, I didn't make it clear that I'm using a project rate of 23.98fps in order to slow down the 59.94fps clips - the majority of other clips in the project were shot at 23.98fps.

If you import the/a clip with other rate kdenlive askes you to adjust that. Simply not select yes/ok.

zolder wrote:If you import the/a clip with other rate kdenlive askes you to adjust that. Simply not select yes/ok.

I am not sure this solves OP's problem.

I tried it with a 60fps project and added a 30fps 3-seconds clip (and selected Cancel when asked to change the profile). The clip was still 3s in the timeline. This indicates to me that kdenlive adjusts the frame rate of imported clips even if the question to adjust was declined.

For OP's scenario: just slow the clip down in the timeline with right-click on the clip and the select Change Speed. Values below 100% slow the clip down.

berndmj wrote:

zolder wrote:If you import the/a clip with other rate kdenlive askes you to adjust that. Simply not select yes/ok.

I am not sure this solves OP's problem.

I tried it with a 60fps project and added a 30fps 3-seconds clip (and selected Cancel when asked to change the profile). The clip was still 3s in the timeline. This indicates to me that kdenlive adjusts the frame rate of imported clips even if the question to adjust was declined.

For OP's scenario: just slow the clip down in the timeline with right-click on the clip and the select Change Speed. Values below 100% slow the clip down.

Thank you. I was aware of how to Change Speed on the timeline but I wasn't sure that would give the smoothest result. I have since tried it and it does look pretty good actually. I will leave this open for the time being and see what else transpires.

ncukowner wrote:

bartoloni wrote:you have to start a project with the original frame rate of the clips.

Sorry, I didn't make it clear that I'm using a project rate of 23.98fps in order to slow down the 59.94fps clips - the majority of other clips in the project were shot at 23.98fps.

the projects NEEDS to be created to the maximum quality of clips, this BECAUSE the duration of clips is automatically adapted to project and you have just to do your work on timeline (nothing changes using 14fps 30 fps 60 fps ) BUT you are absolutely SURE that there is not quality loss.

also some times ago' i pre-processed a 250fps clips slowing down that clip, redering at 250fps... and after that i reimported it on a 60fps project. this just to be sure to have a nice slowmotion effect...

bartoloni wrote:also some times ago' i pre-processed a 250fps clips slowing down that clip, redering at 250fps...

OMG, 250fps yes? Didn't now that high existed That's seriously high, and demands a lot to work with is i guess.

berndmj wrote:

zolder wrote:If you import the/a clip with other rate kdenlive askes you to adjust that. Simply not select yes/ok.

I am not sure this solves OP's problem.

I think it will be handled like that if done in a project set as Bartoloni said, in a high enough setting ...

bartoloni wrote:the projects NEEDS to be created to the maximum quality of clips, this BECAUSE the duration of clips is automatically adapted to project and you have just to do your work on timeline (nothing changes using 14fps 30 fps 60 fps ) BUT you are absolutely SURE that there is not quality loss.

... because if a lower setting it will be imported/converted into that lower quality (what you don't want, as then unwanted loss).
The question is 'Forcing frame rate'. You first have to mind where your (have to) going to force it into. What you goal is (or will be).

You can't force into / reach higher then the project is set to. Loosing/cutting quality is simple. Gaining (actual/real) quality is impossible. This goes for all digital editing (video, sound, image).
A good start is half the result.

Hmm, how does this work then:

also some times ago' i pre-processed a 250fps clips slowing down that clip, redering at 250fps... and after that i reimported it on a 60fps project. this just to be sure to have a nice slowmotion effect...

As I said, I tested it albeit with more sane fps settings, and kdenlive "ignored" the fps of the incoming clip: three seconds in the 30-fps clip became (or stayed) three seconds in the 60-fps project.

So how was your 250-fps clip "slowed down" in your 30-fps project?