Membrane FFmpeg SWResample plugin
Plugin performing audio conversion, resampling and channel mixing, using SWResample module of FFmpeg library.
It is a part of Membrane Multimedia Framework.
installation
Installation
Add the following line to your deps
in mix.exs
. Run mix deps.get
.
{:membrane_ffmpeg_swresample_plugin, "~> 0.10.0"}
You also need to have FFmpeg library installed.
For usage on windows, see Using on Windows
section below.
sample-usage
Sample usage
defmodule Resampling.Pipeline do
use Membrane.Pipeline
alias Membrane.Element.File
alias Membrane.FFmpeg.SWResample.Converter
alias Membrane.Caps.Audio.Raw
@doc false
@impl true
def handle_init(_) do
children = [
file_src: %File.Source{location: "/tmp/input.raw"},
converter: %Converter{
input_caps: %Raw{channels: 2, format: :s24le, sample_rate: 48_000},
output_caps: %Raw{channels: 2, format: :f32le, sample_rate: 44_100}
},
file_sink: %File.Sink{location: "/tmp/output.raw"},
]
links = [
link(:file_src)
|> to(:converter)
|> to(:file_sink)
]
{{:ok, spec: %ParentSpec{children: children, links: links}}, %{}}
end
end
using-on-windows
Using on Windows
It is possible to compile and use this plugin on Windows platform. That requires:
- Git-LFS to clone binaries placed in
ext/windows
directory - Visual C++ Build Tools with Windows SDK (tested on build tools 2015 and SDK for Windows 10)
- FFMpeg 3.4.2 DLLs -
avutil-55.dll
andswresample-2.dll
(64-bit version abvailable here, 32-bit here). The DLLs have to be available at runtime. This can be achieved in a couple of ways:- adding directory with DLLs to
PATH
environment variable - placing them in current directory (where you start
mix run
) - placing them in the directory where erlang executable is located
- making them available system-wide by placing in system (
C:\Windows\System32
,C:\Windows\SysWOW64
) or Windows (C:\Windows
) directory
- adding directory with DLLs to
copyright-and-license
Copyright and License
Copyright 2018, Software Mansion
Licensed under the Apache License, Version 2.0