# Membrane Realtimer plugin
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Membrane plugin for limiting playback speed to realtime, according to buffers' timestamps.
It is a part of [Membrane Multimedia Framework](https://membraneframework.org).
## Installation
The package can be installed by adding `membrane_realtimer_plugin` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:membrane_realtimer_plugin, "~> 0.7.0"}
]
end
```
## Usage
The following pipeline downloads a sample h264 video via HTTP and sends it in realtime via RTP.
It requires [RTP plugin](https://github.com/membraneframework/membrane_rtp_plugin), [RTP H264 plugin](https://github.com/membraneframework/membrane_rtp_h264_plugin) and [UDP plugin](https://github.com/membraneframework/membrane_udp_plugin) to work.
```elixir
defmodule Example.Pipeline do
use Membrane.Pipeline
@ssrc 1234
@impl true
def handle_init(_ctx, _opts) do
structure = [
child(:source, %Membrane.Hackney.Source{
location: "https://membraneframework.github.io/static/samples/ffmpeg-testsrc.h264",
hackney_opts: [follow_redirect: true]
})
|> child(:parser, %Membrane.H264.FFmpeg.Parser{framerate: {30, 1}, alignment: :nal})
|> via_in(Pad.ref(:input, @ssrc), options: [payloader: Membrane.RTP.H264.Payloader])
|> child(:rtp, Membrane.RTP.SessionBin)
|> via_out(Pad.ref(:rtp_output, @ssrc), options: [encoding: :H264])
|> child(:realtimer, Membrane.Realtimer)
|> child(:sink, %Membrane.UDP.Sink{
destination_port_no: 5000,
destination_address: {127, 0, 0, 1}
})
]
{[spec: structure, playback: :playing], %{}}
end
end
```
## Copyright and License
Copyright 2020, [Software Mansion](https://swmansion.com/?utm_source=git&utm_medium=readme&utm_campaign=membrane_realtimer_plugin)
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Licensed under the [Apache License, Version 2.0](LICENSE)