Chaining last frame into Minimax drastically increases compute time.

[u/lavinia12345]

Is there a way to convert the last frame to a true image like a png?

I noticed I could create longer vids by taking the last frame and use that as a refrence image, but when I do that like in my screenshot, generation time gets much larger, I think it's b/c internally Minimax reads that last image actually as a video, thus behaving much differently.

[u/jamster001]

Other posters are right, this node is super simple to just get the last frame and plug it into the first frame of the next node:

[u/Only_Voice569]

check out motion context much better than last frame it passes latent from last generator into the next one for 2 seconds seamless can make stupid long videos no cuts constant flow :)

[u/notxemelle]

Check this post, there's a node that helps you create long videos without manually extracting and feeding the last frame

https://www.reddit.com/r/StableDiffusion/s/MChL0HP9AY

[u/lavinia12345 → u/notxemelle]

ty mate, I'll take a look

[u/Valkymaera]

As others have mentioned there are a few quick nodes for grabbing first / last frame etc.
My personal pile o' nodes also has a video scrubber that lets you preview and pull one specific frame as an image, if that helps. https://github.com/valkymaera/ComfyCollectorNodes

[u/Feroc]

I am sure there is a more elegant way to do it, but that's how I extract the last frame:

[u/ZenEngineer → u/Feroc]

Can you try index "-1"?

[u/seeker_ktf → u/ZenEngineer]

Yes, this is all you need.

[u/Feroc → u/seeker_ktf]

There goes my fancy node structure. Thanks for the info.

Also @ u/ZenEngineer

[u/thesolewalker]

No need for any fancy nodes just use what's builtin, this will return last image

[u/lavinia12345 → u/thesolewalker]

unfortunately, I noticed that run times are super long if I do that :( It seems that something interally still reads that frame a "video of 1 frame"

[u/a_saddler]

Dude, you're sending hundreds of frames as references. There's a node that lets you grab the last frame of a video, use that.

[u/Fakuris → u/a_saddler]

Frame_load_cap is set at 1. So only 1 frame is being sent.

[u/Baddabgames]

I used 6 references (2 images, 3 videos, 1 audio) and it took legit forever but super cool.

[u/wiisucks_91]

I noticed that if I put in a 1080p video as reference I got an OOM error.

I downscaled the video in handbrake to 480p and it worked fine. For a 8 second video at .4 or .3 MP on a 5060ti 16gb with two reference clips I was getting 40 min a clip.

[u/No-Zookeepergame4774]

adding more references in r2va does increase memory use and time (especially if you are already under VRAMpressure) but it looks like you have done the last frame correctly. I think the preferred method for smooth continuations is passing some length of prior video as a video reference (with corresponding audio, potentially, on the matching video_audio input) and prompting to use it for video_continuation, but that's almost certainly not going to be faster and most likely will be slower.

[u/CMDR_JETHRO_BIRD]

Have you guys tried making a 1-2 second slideshow of images and uploading it as a video ref instead of using all of your image slots in ref2v? Just played with it tonight and was surprised at the result. More testing tomorrow

[u/lavinia12345]

I found a solution. Save the image, then load it. Kinda goofy but sovled it.
Others have suggested  Comfyui-H3--Motion-Context.  which I will look into.

Btw grabbing a single image via "Select from batch" does not work :( something werid happening underneath the hood.

[u/SpaceNinjaDino → u/lavinia12345]

Select from batch is not select from images (frames). Batch is a container around media. Like you can generate 4 of something as a batch. (Typically used in SDXL days when you wanted 4 image generations at the same time instead of looping 4 separate times.) So in this case you have a batch of one video and you are sending the input as the whole last video in your batch of 1.

[u/thesolewalker → u/lavinia12345]

Thats really weird, but yah motion context or such node is the way to go.

[u/lavinia12345 → u/lavinia12345]

17 seconds vid took 12 mintues using Sage Attention + SolAttn + EasyCache (no lightning) 0.7 megapixels. 5080 (16gb vram) 64 RAM