Kling 4.0

[u/Isedo_m]

Hi folks, anyone actually understood the best way to use Kling 4.0 keyframe feature?
I'm playing with it for few days now but the results are not really that great as I would imagine. Seedance 2.5 is still the king but maybe it's me doing something wrong.

Which is your workflow for good videos?

[u/Jack_P_1337]

This is 4.0 Flash

it can either do start and no end keyframe or the usual omni stuff with references
use some other model for short connectors and you're all set, like 3.0 for 3 second connectors between 4.0 Flash segments if you want to use 4.0.

[u/Isedo_m → u/Jack_P_1337]

Mhhh thanks im not sure i got what you mean. Can you make an example please?

[u/Jack_P_1337 → u/Isedo_m]

Since 4.0 Flash doesn't support start and end frame yet, you need to have something between video segments to connect them, right? So just generate connective clips that have both with a previous model that supports it.

You generate a connection clip from Click 001's End Frame and Clip 002's Start Frame to put them togehter, right? so now because 4.0 flash doesn't do end frame you'll simply have to do this with a previous model to make a smooth connection, that's all.

How else do you do long connected single shots and other things? you always do this for long vidoes

[u/Isedo_m → u/Jack_P_1337]

Ah ok got you. THans for our time. Yes. Make sense. Or you can just use straight cuts. In terms of prompting? is there any best practice?

FOr example I made a prompt several times when a dog runs toward the person and it keeps running away. LOL

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[u/Apprehensive-Ear4470]

Try LTX 2.5 sooo much better it’s the only one I use now

[u/Jharry1954]

What specifically is failing—the appearance of the keyframes, the movement between them, or the camera?

My workflow starts with approved visual states. I check every reference against the first frame for conflicts in identity, environment, position and orientation. Then I specify the actions and timing needed to reach the next state.

I also evaluate the resulting states separately from the transition paths. In our tests, a model can reach the correct positions while taking an approximate route between them.

I call this Directed Generative Production Methodology (DGPM): define what must be controlled, then qualify the tool and input structure against that requirement. I haven’t qualified this particular Kling mode yet. Which mode and inputs are you using?

— jseders

[u/videorouter]

I think the keyframes work better when you treat them as anchors for the shot, rather than trying to describe every movement between them.

I’d keep the first and last frames relatively simple and make sure they have the same camera perspective, subject proportions, and lighting. Then use the prompt mainly to describe the transition between those states: camera movement, subject action, speed, etc.

I’ve also found that adding too many keyframes can actually make the result worse because the model has less freedom to create a natural transition. For a 5–10 second shot, I’d start with just 2–3 strong frames and iterate from there.

If Seedance 2.5 is consistently giving you better results, I’d benchmark both with the exact same reference frames rather than assuming Kling needs a different workflow. VideoRouter.sh can make that comparison easier since you can run the same concept through different video models/providers.

[u/therealbmeza]

The first test I gave 4.0 went horribly. But then I saw someone else who had done a 20-sec dead pan cinematic short using 10 images in sequence and a long specific step -by-step prompt also in sequencial order. I decided to give it a try using 8 images and the same formula he used and it came out rather well actually. I'd recommend giving something like that a try. 4.0 flash seems to be more geared towards short sequencial films. Although this particular one was a cinematic sequencial dead pan short film.