unsafe static void ExampleRGB(string filename)
{
var settings = new BasicEncoderSettings();
settings.Video.Width = 640;
settings.Video.Height = 480;
settings.Video.Timebase = new Rational(1, 30);
settings.Video.Bitrate = 2000000;
settings.Audio.SampleRate = 44100;
settings.Audio.SampleFormat = BasicSampleFormat.FLTP;
using (var enc = new BasicEncoder(filename, settings))
using (var vFrameGen = new BasicVideoFrame(1000, 2000, BasicPixelFormat.GBRP))
using (var vFrameEnc = new BasicVideoFrame(settings.Video.Width, settings.Video.Height, BasicPixelFormat.YUV420P))
using (var rescaler = new BasicRescaler(vFrameGen, vFrameEnc, BasicRescalerFlags.Lanczos))
using (var aFrame = new BasicAudioFrame(settings.Audio.FrameSize == 0 ? 10000 : settings.Audio.FrameSize, settings.Audio.SampleFormat, settings.Audio.ChannelLayout))
{
byte * bufR = vFrameGen.GetBuffer(2);
byte * bufG = vFrameGen.GetBuffer(1);
byte * bufB = vFrameGen.GetBuffer(0);
int stride = vFrameGen.GetStride(0); // equal for 1 & 2
float *bufA1 = (float *)aFrame.GetBuffer(0);
float *bufA2 = (float *)aFrame.GetBuffer(1);
float t = 0;
float tInc = (float)(2 * Math.PI * 110.0 / settings.Audio.SampleRate);
float tInc2 = tInc / settings.Audio.SampleRate;
int aSamples = 0;
for (int frameNumber = 0; frameNumber < 5 * settings.Video.Timebase.Den / settings.Video.Timebase.Num; frameNumber++)
{
for (int y = 0; y < vFrameGen.Height; y++)
{
for (int x = 0; x < vFrameGen.Width; x++)
{
bufR[y * stride + x] = (byte)(x + y + frameNumber * 3);
bufG[y * stride + x] = (byte)(128 + y + frameNumber * 2);
bufB[y * stride + x] = (byte)(64 + x + frameNumber * 5);
}
}
rescaler.RescaleFrame(vFrameGen, vFrameEnc);
enc.EncodeFrame(vFrameEnc, frameNumber);
while (aSamples < frameNumber * settings.Audio.SampleRate * settings.Video.Timebase.Num / settings.Video.Timebase.Den)
{
for (int k = 0; k < aFrame.SampleCount; k++)
{
float sample = (float)Math.Sin(t) * 0.5f;
bufA1[k] = sample;
bufA2[k] = sample;
t += tInc;
tInc += tInc2;
}
enc.EncodeFrame(aFrame, aSamples);
aSamples += aFrame.SampleCount;
}
}
}
}
public ThreadedEncoder(string filename, BasicEncoderSettings settings, int sourceWidth, int sourceHeight, BasicPixelFormat sourcePixelFormat)
{
_settings = settings;
_encoder = new BasicEncoder(filename, settings);
_frameRescaled = new BasicVideoFrame(settings.Video.Width, settings.Video.Height, settings.Video.PixelFormat);
for (int i = 0; i < 10; i++)
{
_framesFree.Enqueue(new VideoFrame(sourceWidth, sourceHeight, sourcePixelFormat));
}
_rescaler = new BasicRescaler(sourceWidth, sourceHeight, sourcePixelFormat, settings.Video.Width, settings.Video.Height, settings.Video.PixelFormat, BasicRescalerFlags.FastBilinear);
_thread = new Thread(encodingThread);
_thread.IsBackground = true; // don't prevent program shutting down if the thread is still running
_thread.Start();
}
public static unsafe void Capture(string filename)
{
var settings = new BasicEncoderSettings();
settings.Video.Width = 1920;
settings.Video.Height = 1080;
settings.Video.Timebase = new Rational(1, 2000);
settings.Video.Bitrate = 2000000;
using (var enc = new ThreadedEncoder(filename, settings, 1920, 1080, BasicPixelFormat.BGR24))
{
var start = DateTime.UtcNow;
var fpsStart = DateTime.UtcNow;
var prevFrameTimestamp = DateTime.UtcNow;
var totalFrames = 0;
while ((DateTime.UtcNow - start).TotalSeconds < 25)
{
VideoFrame frame;
while ((frame = enc.GetFreeFrame()) == null)
{
Thread.Yield();
}
if (totalFrames == 9)
{
fpsStart = DateTime.UtcNow;
}
else if (totalFrames > 20)
{
Console.Title = $"{DateTime.Now:HH:mm:ss.fff} [{(totalFrames - 10) / (DateTime.UtcNow - fpsStart).TotalSeconds:0.0}]";
}
frame.Graphics.CopyFromScreen(0, 0, 0, 0, frame.Bitmap.Size, CopyPixelOperation.SourceCopy);
frame.Timestamp = DateTime.UtcNow;
Console.Write($"{1 / (frame.Timestamp - prevFrameTimestamp).TotalSeconds:0.0} ");
prevFrameTimestamp = frame.Timestamp;
totalFrames++;
enc.QueueFrameToEncode(frame);
}
enc.Finish();
}
}
unsafe static void ExampleYUV(string filename)
{
var settings = new BasicEncoderSettings();
settings.Video.Width = 1280;
settings.Video.Height = 720;
settings.Video.Timebase = new Rational(1, 60);
settings.Video.Bitrate = 5000000;
settings.Audio.SampleRate = 44100;
settings.Audio.SampleFormat = BasicSampleFormat.FLTP;
using (var enc = new BasicEncoder(filename, settings))
using (var vFrame = new BasicVideoFrame(settings.Video.Width, settings.Video.Height, BasicPixelFormat.YUV420P))
using (var aFrame = new BasicAudioFrame(settings.Audio.FrameSize == 0 ? 10000 : settings.Audio.FrameSize, settings.Audio.SampleFormat, settings.Audio.ChannelLayout))
{
byte * bufY = vFrame.GetBuffer(0);
byte * bufCb = vFrame.GetBuffer(1);
byte * bufCr = vFrame.GetBuffer(2);
int strideY = vFrame.GetStride(0);
int strideCb = vFrame.GetStride(1);
int strideCr = vFrame.GetStride(2);
float *bufA1 = (float *)aFrame.GetBuffer(0);
float *bufA2 = (float *)aFrame.GetBuffer(1);
float t = 0;
float tInc = (float)(2 * Math.PI * 110.0 / settings.Audio.SampleRate);
float tInc2 = tInc / settings.Audio.SampleRate;
int aSamples = 0;
for (int frameNumber = 0; frameNumber < 5 * settings.Video.Timebase.Den / settings.Video.Timebase.Num; frameNumber++)
{
for (int y = 0; y < settings.Video.Height; y++)
{
for (int x = 0; x < settings.Video.Width; x++)
{
bufY[y * strideY + x] = (byte)(x + y + frameNumber * 3);
}
}
for (int y = 0; y < settings.Video.Height / 2; y++)
{
for (int x = 0; x < settings.Video.Width / 2; x++)
{
bufCb[y * strideCb + x] = (byte)(128 + y + frameNumber * 2);
bufCr[y * strideCr + x] = (byte)(64 + x + frameNumber * 5);
}
}
enc.EncodeFrame(vFrame, frameNumber);
while (aSamples < frameNumber * settings.Audio.SampleRate * settings.Video.Timebase.Num / settings.Video.Timebase.Den)
{
for (int k = 0; k < aFrame.SampleCount; k++)
{
float sample = (float)Math.Sin(t) * 0.5f;
bufA1[k] = sample;
bufA2[k] = sample;
t += tInc;
tInc += tInc2;
}
enc.EncodeFrame(aFrame, aSamples);
aSamples += aFrame.SampleCount;
}
}
}
}
