libyuv-node

Node.js bindings for Chromium's libyuv library.



libyuv is an open source project that includes YUV scaling and conversion functionality.

- Scale YUV to prepare content for compression, with point, bilinear or box filter.
- Convert to YUV from webcam formats for compression.
- Convert to RGB formats for rendering/effects.
- Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
- Optimized for SSSE3/AVX2 on x86/x64.
- Optimized for Neon on Arm.
- Optimized for MSA on Mips.

For more information about libyuv, visit Google's site at https://chromium.googlesource.com/libyuv/libyuv/

Installation

First, download and install cmake and make sure it
is available in your PATH.

Then:
``
npm install libyuv
`

You will need cmake available on any system (such as CI) which builds your
project, as there are no prebuilt binaries yet.

Why?

If you are processing video frames in Node.js, you may need to convert the color space
of such frames between a compact YUV chroma-subsampled format (like YUV 4:2:0) and RGB0
and vice versa. You may also need to scale the video frame from one size to another
performantly with various sampling methods. libyuv provides these capabilities,
and using this binding you can very easily perform these conversions.

It works very well with libraries like node-webrtc.

Building

Currently there are no prebuilt binaries available. On a modern system, building
libyuv from scratch takes approximately 30 seconds and requires downloading
about 17MB of source code.

$3

- Make sure to install
Windows 10 SDK
or later or the build may fail. Version 10.0.19041.0` or later is recommended.

Development

$3

#### Windows: Permission Denied ("build" is open in a another process)

The Visual Studio Code C# extension opens OmniSharp with the "build" folder open as the current working directory.
This is not a C# project, so it is safe to find the "C#" extension in your editor's Extensions list and "Disable (Workspace)".
This will only affect this workspace, not any other projects you may have on your machine.

Contributing

PRs are welcome!