kdenlive export implemented

[guladam]

I have implemented the option to export to kdenlive.
The work is based on the already existing shotcut export version, but the generated MLT file is tailored specifically for the kdenlive project requirements.

What works after testing:

• auto-editing one clip, with either a single or multiple audio and video channels
• all cuts are grouped together across multiple tracks
• sped up clips (tested it with the --silent-speed option)

Specifics of my system:

• OS: Linux Mint 22.1 Cinnamon
• Python version: 3.12
• kdenlive version: 23.08.5

Let me know if there is anything else to do from my side.

[guladam]

Thanks for the cleanup!

[WyattBlue]

This is a fantastic PR for a first time contributor. Granted, there are some things that can be improved.

It's possible to do this in auto-editor:

auto-editor 1.mp4 2.mp4 --export kdenlive

but "2.mp4" doesn't have the right source because you hardcoded src to be always be the first clip.
Also

auto-editor example.mp4 --video-speed 2 --export kdenlive

Should have the pitch be same but it's not.

[guladam]

Hey, thanks for the feedback!

When I have some free time again, I'll try to do the improvements you suggested.

It's possible to do this in auto-editor:

auto-editor 1.mp4 2.mp4 --export kdenlive

I suspected that this might be the case... I have to admit that I started working on this based on the already existing Shotcut export, since both programs use MLT for project architecture. The Shotcut export uses this hardcoded source clip solution. That will be relatively easy to implement.

For the other one:

auto-editor example.mp4 --video-speed 2 --export kdenlive

Should have the pitch be same but it's not.

Can you elaborate a bit? You mean that audio pitch should stay the same but it shifts the pitch up?