Membrane Realtimer plugin

Membrane plugin for limiting playback speed to realtime, according to buffers' timestamps.

It is a part of Membrane Multimedia Framework.

Installation

The package can be installed by adding membrane_realtimer_plugin to your list of dependencies in mix.exs:

def deps do
  [
    {:membrane_realtimer_plugin, "~> 0.10.1"}
  ]
end

Usage

The following pipeline downloads a sample h264 video via HTTP and sends it in realtime via RTP. It requires RTP plugin, RTP H264 plugin and UDP plugin to work.

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

Licensed under the Apache License, Version 2.0