private static Bitmap BgraToBitmap(VideoFrame frame)
{
int width = frame.Width;
int height = frame.Height;
Bitmap bitmap = new Bitmap(width, height, (AVPixelFormat)frame.AVFrame.format == AVPixelFormat.AV_PIX_FMT_BGRA ? PixelFormat.Format32bppArgb : PixelFormat.Format24bppRgb);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
var bytewidth = Math.Min(bitmapData.Stride, frame.Linesize[0]);
FFmpegHelper.CopyPlane(frame.Data[0], frame.Linesize[0], bitmapData.Scan0, bitmapData.Stride, bytewidth, height);
bitmap.UnlockBits(bitmapData);
return(bitmap);
}
/// <summary>
/// convert <see cref="PixelFormat.Format32bppArgb"/> or <see cref="PixelFormat.Format24bppRgb"/> bitmap to videoframe
/// </summary>
/// <param name="bitmap"></param>
/// <returns></returns>
public static VideoFrame ToVideoFrame(this Bitmap bitmap)
{
if (bitmap.PixelFormat != PixelFormat.Format24bppRgb && bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new FFmpegException(FFmpegException.NotSupportFormat);
}
int width = bitmap.Width;
int height = bitmap.Height;
VideoFrame frame = new VideoFrame(width, height, bitmap.PixelFormat == PixelFormat.Format24bppRgb ? AVPixelFormat.AV_PIX_FMT_BGR24 : AVPixelFormat.AV_PIX_FMT_BGRA);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, bitmap.PixelFormat);
var bytewidth = Math.Min(bitmapData.Stride, frame.Linesize[0]);
FFmpegHelper.CopyPlane(bitmapData.Scan0, bitmapData.Stride, frame.Data[0], frame.Linesize[0], bytewidth, height);
bitmap.UnlockBits(bitmapData);
return(frame);
}