LumaaiEx

---

A client library for the Luma Labs API, providing a simple and intuitive interface for Elixir applications to interact with Luma Labs services.

Installation

Add lumaai_ex to your list of dependencies in mix.exs:

def deps do
  [
    {:lumaai_ex, "~> 0.1.1"}
  ]
end

Usage

To use the Luma Labs API, you need an API key. Sign up for an account on the Luma Labs website to obtain your key.

Authentication

1. Get a key from https://lumalabs.ai/dream-machine/api/keys
2. Pass it to the LumaaiEx client by either:
   1. Setting the LUMAAI_API_KEY environment variable
   2. Passing auth_token to the LumaaiEx.new function

Setting up the lumaai

Using LUMAAI_API_KEY env variable:

lumaai = LumaaiEx.new()

Using auth_token parameter:

lumaai = LumaaiEx.new(auth_token: "your_auth_token")

Making API calls

Create a new text-to-video generation

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "A teddy bear in sunglasses playing electric guitar and dancing"
})

Create a generation with loop and aspect ratio

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "A teddy bear in sunglasses playing electric guitar and dancing",
  loop: true,
  aspect_ratio: "3:4"
})

Create an image-to-video generation with a start frame

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "Low-angle shot of a majestic tiger prowling through a snowy landscape, leaving paw prints on the white blanket",
  keyframes: %{
    frame0: %{
      type: "image",
      url: "https://storage.cdn-luma.com/dream_machine/7e4fe07f-1dfd-4921-bc97-4bcf5adea39a/video_0_thumb.jpg"
    }
  }
})

Extend a video

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "A teddy bear in sunglasses playing electric guitar and dancing",
  keyframes: %{
    frame0: %{
      type: "generation",
      id: "d1968551-6113-4b46-b567-09210c2e79b0"
    }
  }
})

Get a specific generation

{:ok, generation} = LumaaiEx.get_generation(lumaai, "d1968551-6113-4b46-b567-09210c2e79b0")

List all generations

{:ok, generations} = LumaaiEx.list_generations(lumaai, limit: 100, offset: 0)

Delete a generation

{:ok, _} = LumaaiEx.delete_generation(lumaai, "d1968551-6113-4b46-b567-09210c2e79b0")

Get available camera motions

{:ok, supported_camera_motions} = LumaaiEx.get_camera_motions(lumaai)

Create a generation with a callback URL

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "A teddy bear in sunglasses playing electric guitar and dancing",
  callback_url: "https://your-api-endpoint.com/callback"
})

How to get the video for a generation

Right now, the only supported way is via polling. The create endpoint returns an id which is a UUID V4. You can use it to poll for updates (you can see the video at generation[:assets][:video]).

defmodule GenerationPoller do
  def poll_until_completed(lumaai, generation) do
    case LumaaiEx.get_generation(lumaai, generation[:id]) do
      {:ok, %{state: "completed", assets: %{video: video_url}}} ->
        {:ok, video_url}
      {:ok, %{state: "failed", failure_reason: reason}} ->
        {:error, "Generation failed: #{reason}"}
      {:ok, _} ->
        IO.puts("Dreaming...")
        Process.sleep(3000)
        poll_until_completed(lumaai, generation)
      {:error, reason} ->
        {:error, reason}
    end
  end
end

{:ok, generation} = LumaaiEx.create_generation(lumaai, %{
  prompt: "A teddy bear in sunglasses playing electric guitar and dancing"
})

case GenerationPoller.poll_until_completed(lumaai, generation) do
  {:ok, video_url} ->
    # Download the video
    {:ok, %HTTPoison.Response{body: body}} = HTTPoison.get(video_url)
    File.write!(~s(#{generation[:id]}.mp4), body)
    IO.puts(~s(File downloaded as "#{generation[:id]}.mp4"))
  {:error, reason} ->
    IO.puts("Error: " <> reason)
end

For more information on available endpoints and parameters, refer to the Luma Labs API documentation.

Documentation

Please find documentation on the HexDocs.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

Copyright (c) 2024 Vitaly Gorodetsky This project is licensed under the MIT License.