/// <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];
frameCount = 0;
_keyVector = Args.keyVector;
_keyVector.CreateKeyOutputFile();
Console.WriteLine($"Video Buffer Allocated: {_videoBuffer.Length}");
var audioPipeName = GetPipeName();
var videoPipeName = GetPipeName();
var videoInArgs = $"-thread_queue_size 512 -use_wallclock_as_timestamps 1 -f rawvideo -pix_fmt rgb32 -video_size {Args.ImageProvider.Width}x{Args.ImageProvider.Height} -i {PipePrefix}{videoPipeName}";
var videoOutArgs = $"{Args.VideoArgsProvider(Args.VideoQuality)} -r {Args.FrameRate}";
if (settings.Resize)
{
var width = settings.ResizeWidth;
var height = settings.ResizeHeight;
if (width % 2 == 1)
{
++width;
}
if (height % 2 == 1)
{
++height;
}
videoOutArgs += $" -vf scale={width}:{height}";
}
string audioInArgs = "", audioOutArgs = "";
if (Args.AudioProvider != null)
{
audioInArgs = $"-thread_queue_size 512 -f s16le -acodec pcm_s16le -ar {Args.Frequency} -ac {Args.Channels} -i {PipePrefix}{audioPipeName}";
audioOutArgs = Args.AudioArgsProvider(Args.AudioQuality);
// UpdatePeriod * Frequency * (Bytes per Second) * Channels * 2
var audioBufferSize = (int)((1000.0 / Args.FrameRate) * 44.1 * 2 * 2 * 2);
_audioPipe = new NamedPipeServerStream(audioPipeName, PipeDirection.Out, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous, 0, audioBufferSize);
}
_ffmpegIn = new NamedPipeServerStream(videoPipeName, PipeDirection.Out, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous, 0, _videoBuffer.Length);
_ffmpegProcess = FFmpegService.StartFFmpeg($"{videoInArgs} {audioInArgs} {videoOutArgs} {audioOutArgs} {Args.OutputArgs} \"{Args.FileName}\"", Args.FileName);
}
