/// <summary>
/// Creates a new instance of <see cref="FFmpegWriter"/>.
/// </summary>
public FFmpegWriter(FFmpegVideoWriterArgs args)
{
var settings = ServiceProvider.Get <FFmpegSettings>();
_videoBuffer = new byte[args.ImageProvider.Width * args.ImageProvider.Height * 4];
Console.WriteLine($"Video Buffer Allocated: {_videoBuffer.Length}");
var videoPipeName = GetPipeName();
var argsBuilder = new FFmpegArgsBuilder();
argsBuilder.AddInputPipe(videoPipeName)
.AddArg("-thread_queue_size 512")
.AddArg($"-framerate {args.FrameRate}")
.SetFormat("rawvideo")
.AddArg("-pix_fmt rgb32")
.SetVideoSize(args.ImageProvider.Width, args.ImageProvider.Height);
var output = argsBuilder.AddOutputFile(args.FileName)
.AddArg(args.VideoArgsProvider(args.VideoQuality))
.SetFrameRate(args.FrameRate);
if (settings.Resize)
{
var width = settings.ResizeWidth;
var height = settings.ResizeHeight;
if (width % 2 == 1)
{
++width;
}
if (height % 2 == 1)
{
++height;
}
output.AddArg($"-vf scale={width}:{height}");
}
if (args.AudioProvider != null)
{
var audioPipeName = GetPipeName();
argsBuilder.AddInputPipe(audioPipeName)
.AddArg("-thread_queue_size 512")
.SetFormat("s16le")
.SetAudioCodec("pcm_s16le")
.SetAudioFrequency(args.Frequency)
.SetAudioChannels(args.Channels);
output.AddArg(args.AudioArgsProvider(args.AudioQuality));
// UpdatePeriod * Frequency * (Bytes per Second) * Channels * 2
var audioBufferSize = (int)((1000.0 / args.FrameRate) * 44.1 * 2 * 2 * 2);
_audioPipe = new NamedPipeServerStream(audioPipeName, PipeDirection.Out, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous, 0, audioBufferSize);
}
_ffmpegIn = new NamedPipeServerStream(videoPipeName, PipeDirection.Out, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous, 0, _videoBuffer.Length);
output.AddArg(args.OutputArgs);
_ffmpegProcess = FFmpegService.StartFFmpeg(argsBuilder.GetArgs(), args.FileName);
}