public void StartVideoStreaming(PictureSize pictureSize, int fps = 20)
{
if (IsVideoStreamOpenned)
{
return;
}
videoStreamFps = fps;
videoFramesInterval = 1000 / videoStreamFps;
videoStreamHandle = RaspberryCamInterop.OpenCameraStream(devicePath,
(uint)pictureSize.Width, (uint)pictureSize.Height, (uint)fps);
}
private static void Main(string[] args)
{
Console.WriteLine("Starting...");
var handle = RaspberryCamInterop.OpenCameraStream("/dev/video0", 640, 480, 20);
var previousSize = 0;
var data = new byte [0];
for (int i = 0; i < 100; i++)
{
var watch = Stopwatch.StartNew();
var pictureBuffer = RaspberryCamInterop.GrabVideoFrame(handle);
watch.Stop();
Console.WriteLine("GrabVideoFrame take: {0} ms", watch.ElapsedMilliseconds);
/*
* if we allocate a new buffer for each frame, the garbadge collector pause the app while collecting.
*/
if (pictureBuffer.Size > previousSize)
{
data = new byte[pictureBuffer.Size];
}
Marshal.Copy(pictureBuffer.Data, data, 0, pictureBuffer.Size);
/*
* if you uncomment this, you will solicit garbage collection and decrease performances
*/
//MemoryStream s = new MemoryStream(data);
//using (var fs = File.Open(string.Format("capture_{0}.raw", i), FileMode.Create))
//{
// s.CopyTo(fs);
// s.Flush();
// fs.Flush();
//}
}
RaspberryCamInterop.CloseCameraStream(handle);
}
