CSVideo is a C# Library for writing video files using FFmpeg.

I was searching for a good C# video writing library for a long time, and the only one that could output a modern formats (H264 etc.) was Accord.FFmpeg. The framework however requires a lot of extra libraries, and the video file writer is glitchy and does not work with audio.

This project aims to provide a lightweight and easy-to-use FFmpeg video writing library without any of these problems.

One of the design goals for this library is an easy-to-use API. Part of this is not only a simple set of exposed functions, but also the chosen default configuration. In contrast to libraries like Accord, the default configuration for this library outputs high-quality audio and video in 1920x1080 resolution. However, you can also change the configuration to your liking, if you want something more special.

To use this library, you need the FFmpeg library files. I tested it with the libraries supplied by FFmpeg.AutoGen (v4.2), which you can download from here, but you can also try the latest version from the FFmpeg site. Once you have these libraries, you can use CSVideo as follows:

FFmpegLoader.Load(@"C:\the\ffmpeg\folder");

using (var writer = new VideoWriter(OutputPath))
{
	writer.Open();
	while (true)
	{
		if (writer.WriteVideo)
		{
			// Write a video frame
			writer.WriteVideoFrame(bitmap);
		}
		else
		{
			// Write an audio frame
			writer.WriteAudioFrame(audioData);
		}
	}
}

For a more complete example, see the CSVideo.Example project.

Supports mono and stereo floating-point audio samples, for example from a CSCore stream. The default is stereo, so for mono streams you have to set writer.Channels = 1. It only supports mono and stereo, any different number of channels will lead to an exception

Thanks to FFmpeg.AutoGen by Ruslan-B for the very nice C# FFmpeg wrapper

You can help me make CSVideo the go-to solution for video manipulation in C# by reporting bugs in the GitHub issue tracker, or submitting pull requests. I appreciate every improvement to this repository.