Community Livebooks Thread - Share Yours!

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.

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:

This file has been truncated. show original