public static void UpdateBitmap(ref Bitmap bitmap, ref VideoFrame frame)
{
var rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
BitmapData data = bitmap.LockBits(rect, ImageLockMode.WriteOnly, bitmap.PixelFormat);
Marshal.Copy(frame.Data, 0, data.Scan0, frame.Data.Length);
bitmap.UnlockBits(data);
}
public unsafe bool TryDecode(ref VideoPacket packet, out VideoFrame frame)
{
if (_videoDecoder == null) _videoDecoder = new VideoDecoder();
fixed (byte* pData = &packet.Data[0])
{
_avPacket.data = pData;
_avPacket.size = packet.Data.Length;
if (_videoDecoder.TryDecode(ref _avPacket, ref _avFrame))
{
if (_videoConverter == null) _videoConverter = new VideoConverter(_pixelFormat.ToAVPixelFormat());
byte[] data = _videoConverter.ConvertFrame(ref _avFrame);
frame = new VideoFrame();
frame.Timestamp = packet.Timestamp;
frame.Number = packet.FrameNumber;
frame.Width = packet.Width;
frame.Height = packet.Height;
frame.Depth = data.Length/(packet.Width*packet.Height);
frame.PixelFormat = _pixelFormat;
frame.Data = data;
return true;
}
}
frame = null;
return false;
}
public static Bitmap CreateBitmap(ref VideoFrame frame)
{
PixelFormat pixelFormat = ConvertPixelFormat(frame.PixelFormat);
var bitmap = new Bitmap(frame.Width, frame.Height, pixelFormat);
if (pixelFormat == PixelFormat.Format8bppIndexed)
{
ColorPalette palette = bitmap.Palette;
for (int i = 0; i < palette.Entries.Length; i++)
{
palette.Entries[i] = Color.FromArgb(i, i, i);
}
bitmap.Palette = palette;
}
UpdateBitmap(ref bitmap, ref frame);
return bitmap;
}
private void OnVideoPacketDecoded(VideoFrame frame)
{
_frame = frame;
}
/// <summary>
/// Stop video processing
/// </summary>
private void StopVideo()
{
timerVideoUpdate.Enabled = false;
videoPacketDecoderWorker.Stop();
videoPacketDecoderWorker.Join();
frame = null;
frameBitmap = null;
}
/// <summary>
/// Determines what happens if a video packet is decoded.
/// </summary>
/// <param name="frame">Frame.</param>
private void OnVideoPacketDecoded(VideoFrame frame)
{
data = frame.Data;
}
private void OnVideoPacketDecoded(VideoFrame videoFrame)
{
frame = videoFrame;
}