Community Livebooks Thread - Share Yours!

AstonJ · April 17, 2023, 7:00pm

Made a cool Livebook you want to share? Please do so in this thread

akash-akya · April 17, 2023, 4:54pm

Creating rainbow using Vix

Creating Rainbow. Quick introduction to working with complex numbers and its operations, mapim, buildlut.

There is non-interactive blog post version of the same here: Creating Rainbow using Vix 🌈 - *scratch*

I am thinking of writing few livebooks to showcase few core libvips operations that are powerful but lack discoverability or difficult to get the intuition. This is first in the direction. I’m writing as I’m trying to better understand concepts myself, so corrections or any type of feedbacks are welcome.

akash-akya · April 18, 2023, 5:44pm

Auto correct document rotation using Vix

Using image processing techniques such as Fourier Transformation, Complex Planes.

github.com

akash-akya/vix/blob/master/livebooks/auto_correct_rotation.livemd

# Auto Correct Document Rotation

```elixir
Mix.install(
  [
    {:vix, "~> 0.17.0"},
    {:kino, "~> 0.9.2"}
  ],
  # pre-built binaries does not support fourier transform operations
  # since these operations depend on an additional library.
  #
  # Usually the platform/OS provided libvips comes with these additional library
  # so we are telling vix to use the libvips provided by the platform
  # and compile NIF for that. Follow platform specific libvips
  # installation guide
  system_env: [
    {"VIX_COMPILATION_MODE", "PLATFORM_PROVIDED_LIBVIPS"}
  ]
)
```

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akash-akya · November 24, 2023, 6:23pm

Video Streaming Server Using FFmpeg

An example showcasing streaming input and output with external program, which is ffmpeg in this case.

github.com

akash-akya/ex_cmd/blob/master/livebooks/video-streaming-server-using-ffmpeg.livemd

# Video Streaming Server Using FFmpeg

```elixir
Mix.install([
  {:req, "~> 0.4.5"},
  {:ex_cmd, "~> 0.10.0"},
  {:plug, "~> 1.15"},
  {:kino, "~> 0.11.3"},
  {:bandit, "~> 1.1"}
])
```

## Introduction

Elixir and Erlang provide [`Port`](https://hexdocs.pm/elixir/Port.html) a Port for running external programs. However, communicating with these programs over stdio can lead to various issues. [`ExCmd`](https://hexdocs.pm/ex_cmd/readme.html) and [`Exile`](https://hexdocs.pm/exile/readme.html) libraries address these concerns. Along with that they provide beloved streaming capabilities. In otherwords they let you stream input, output _all the way down_.

Let's take an example to illustrate the streaming capabilities. Here, we'll create an HTTP server to watermark a video.

The server should perform the following:

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RemyXRenard · January 20, 2024, 9:01pm

Examples of :io_lib.format in a Livebook

I was doing some number formatting for an Exercism.io exercise (the Ledger refactoring) and was lamenting the lack of printf or strfmt. I looked briefly at :io_lib.format but it didn’t sink in immediately. After a period of darkness, I took a closer look and realized that :io_lib.format was just the ticket.
I didn’t find many examples, so I put together a livebook that covers much of the use of :io_lib.format. It’s fairly straightforward and doesn’t exploit any wild Livebook functionality, but perhaps it will be helpful.

I haven’t published a livebook before, so let me know if it’s not working as expected.

Cheers.

joelpaulkoch · February 22, 2024, 1:35pm

Stable Diffusion with ControlNet in Bumblebee

With ControlNet you can guide the text to image process of Stable Diffusion.
In this livebook you can give Stable Diffusion a scribble image.
Here the bird image that I used as input in the “Scribble bird” section:
scribble_bird

You can use other types of input images as well, the ones listed here should work: lllyasviel/sd-controlnet-scribble · Hugging Face

You need more than 8GB of RAM to run Stable Diffusion and generating images takes some time. For instance, on my CPU it’s around 5 minutes.