public static unsafe Bitmap CreateImageFromFrame(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;
}
Rectangle rect = new Rectangle(0, 0, frame.Width, frame.Height);
BitmapData data = bitmap.LockBits(rect, ImageLockMode.WriteOnly, pixelFormat);
Marshal.Copy(frame.Data, 0, data.Scan0, frame.Data.Length);
bitmap.UnlockBits(data);
return bitmap;
}
public bool TryDecode(ref VideoPacket packet, out VideoFrame frame)
{
if (_videoDecoder == null)
_videoDecoder = new VideoDecoder();
frame = new VideoFrame();
FFmpegNative.AVFrame avFrame;
if (_videoDecoder.TryDecode(ref packet.Data, out avFrame))
{
if (_videoConverter == null)
_videoConverter = new VideoConverter(PixelFormatHelper.ToAVPixelFormat(_pixelFormat));
frame.Timestamp = packet.Timestamp;
frame.FrameNumber = packet.FrameNumber;
frame.PixelFormat = _pixelFormat;
frame.Data = _videoConverter.ConvertFrame(avFrame);
return true;
}
return false;
}
public static unsafe Bitmap CreateImageFromFrame(VideoFrame frame)
{
fixed (void* pData = &frame.Data[0, 0, 0])
{
PixelFormat pixelFormat = ConvertPixelFormat(frame.PixelFormat);
int height = frame.Data.GetLength(0);
int width = frame.Data.GetLength(1);
int depth = frame.Data.GetLength(2);
var bitmap = new Bitmap(width, height, width*depth, pixelFormat, new IntPtr(pData));
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;
}
return bitmap;
}
}
public bool TryDecode(ref VideoPacket packet, out VideoFrame frame)
{
if (_videoDecoder == null)
_videoDecoder = new VideoDecoder();
frame = new VideoFrame();
AVFrame avFrame;
if (_videoDecoder.TryDecode(ref packet.Data, out avFrame))
{
if (_videoConverter == null)
_videoConverter = new VideoConverter(_pixelFormat.ToAVPixelFormat());
frame.Timestamp = packet.Timestamp;
frame.FrameNumber = packet.FrameNumber;
frame.Width = packet.Width;
frame.Height = packet.Height;
frame.PixelFormat = _pixelFormat;
frame.Data = _videoConverter.ConvertFrame(avFrame);
return true;
}
return false;
}
private void OnVideoPacketDecoded(VideoFrame frame)
{
_frameImage = VideoHelper.CreateImageFromFrame(frame);
}
