/// <summary>
/// Used for encoding frames into a stream (Requires using a supported format like 'flv' for streaming)
/// </summary>
/// <param name="destinationStream">Output stream</param>
/// <param name="width">Input width of the video in pixels</param>
/// <param name="height">Input height of the video in pixels </param>
/// <param name="framerate">Input framerate of the video in fps</param>
/// <param name="encoderOptions">Extra FFmpeg encoding options that will be passed to FFmpeg</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public VideoWriter(Stream destinationStream, int width, int height, double framerate,
FFmpegVideoEncoderOptions encoderOptions = null, string ffmpegExecutable = "ffmpeg")
{
if (width <= 0 || height <= 0)
{
throw new InvalidDataException("Video frame dimensions have to be bigger than 0 pixels!");
}
if (framerate <= 0)
{
throw new InvalidDataException("Video framerate has to be bigger than 0!");
}
if (destinationStream == null)
{
throw new NullReferenceException("Stream can't be null!");
}
UseFilename = false;
ffmpeg = ffmpegExecutable;
Width = width;
Height = height;
Framerate = framerate;
DestinationStream = destinationStream;
EncoderOptions = encoderOptions ?? new FFmpegVideoEncoderOptions();
}
/// <summary>
/// Used for encoding frames into a new video file
/// </summary>
/// <param name="filename">Output video file name/path</param>
/// <param name="width">Input width of the video in pixels</param>
/// <param name="height">Input height of the video in pixels </param>
/// <param name="framerate">Input framerate of the video in fps</param>
/// <param name="encoderOptions">Extra FFmpeg encoding options that will be passed to FFmpeg</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public VideoWriter(string filename, int width, int height, double framerate,
FFmpegVideoEncoderOptions encoderOptions = null, string ffmpegExecutable = "ffmpeg")
{
if (width <= 0 || height <= 0)
{
throw new InvalidDataException("Video frame dimensions have to be bigger than 0 pixels!");
}
if (framerate <= 0)
{
throw new InvalidDataException("Video framerate has to be bigger than 0!");
}
if (string.IsNullOrEmpty(filename))
{
throw new NullReferenceException("Filename can't be null or empty!");
}
UseFilename = true;
Filename = filename;
ffmpeg = ffmpegExecutable;
Width = width;
Height = height;
Framerate = framerate;
DestinationStream = null;
EncoderOptions = encoderOptions ?? new FFmpegVideoEncoderOptions();
}
/// <summary>
/// Opens output stream for writing and returns both the input and output streams. Make sure to use a streaming format (like flv).
/// </summary>
/// <param name="options">Output options</param>
/// <param name="process">FFmpeg process</param>
/// <param name="inputArguments">Input arguments (such as -f, -v:c, -video_size,...)</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public static (Stream Input, Stream Output) StreamToStream(FFmpegVideoEncoderOptions options, out Process process,
string inputArguments = "", string ffmpegExecutable = "ffmpeg")
{
var(input, output) = FFmpegWrapper.Open(ffmpegExecutable, $"{inputArguments} -i - " +
$"-c:v {options.EncoderName} {options.EncoderArguments} -f {options.Format} -", out process);
return(input, output);
}
/// <summary>
/// Uses input file and returns the output stream. Make sure to use a streaming format (like flv).
/// </summary>
/// <param name="inputFilename">Input video file name/path</param>
/// <param name="options">Output options</param>
/// <param name="process">FFmpeg process</param>
/// <param name="inputArguments">Input arguments (such as -f, -v:c, -video_size,...)</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public static Stream FileToStream(string inputFilename, FFmpegVideoEncoderOptions options, out Process process,
string inputArguments = "", string ffmpegExecutable = "ffmpeg")
{
var output = FFmpegWrapper.OpenOutput(ffmpegExecutable, $"{inputArguments} -i \"{inputFilename}\" " +
$"-c:v {options.EncoderName} {options.EncoderArguments} -f {options.Format} -", out process);
return(output);
}
/// <summary>
/// Opens output file for writing and returns the input stream.
/// </summary>
/// <param name="outputFilename">Output video file name/path</param>
/// <param name="options">Output options</param>
/// <param name="process">FFmpeg process</param>
/// <param name="inputArguments">Input arguments (such as -f, -v:c, -video_size,...)</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public static Stream StreamToFile(string outputFilename, FFmpegVideoEncoderOptions options, out Process process,
string inputArguments = "", bool showOutput = false, string ffmpegExecutable = "ffmpeg")
{
var input = FFmpegWrapper.OpenInput(ffmpegExecutable, $"{inputArguments} -i - " +
$"-c:v {options.EncoderName} {options.EncoderArguments} -f {options.Format} \"{outputFilename}\"", out process, showOutput);
return(input);
}
/// <summary>
/// Converts given input file to output file.
/// </summary>
/// <param name="inputFilename">Input video file name/path</param>
/// <param name="outputFilename">Input video file name/path</param>
/// <param name="options">Output options</param>
/// <param name="process">FFmpeg process</param>
/// <param name="inputArguments">Input arguments (such as -f, -v:c, -video_size,...)</param>
/// <param name="ffmpegExecutable">Name or path to the ffmpeg executable</param>
public static void FileToFile(string inputFilename, string outputFilename, FFmpegVideoEncoderOptions options, out Process process,
string inputArguments = "", bool showOutput = false, string ffmpegExecutable = "ffmpeg")
{
var output = FFmpegWrapper.ExecuteCommand(ffmpegExecutable, $"{inputArguments} -i \"{inputFilename}\" " +
$"-c:v {options.EncoderName} {options.EncoderArguments} -f {options.Format} \"{outputFilename}\"", showOutput);
process = output;
}
