private static unsafe void DecodeAllFramesToImages(AVHWDeviceType HWDevice)
{
// decode all frames from url, please not it might local resorce, e.g. string url = "../../sample_mpeg4.mp4";
var url = "http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"; // be advised this file holds 1440 frames
using (var vsd = new VideoStreamDecoder(url, HWDevice))
{
Console.WriteLine($"codec name: {vsd.CodecName}");
var info = vsd.GetContextInfo();
info.ToList().ForEach(x => Console.WriteLine($"{x.Key} = {x.Value}"));
var sourceSize = vsd.FrameSize;
var sourcePixelFormat = HWDevice == AVHWDeviceType.AV_HWDEVICE_TYPE_NONE ? vsd.PixelFormat : GetHWPixelFormat(HWDevice);
var destinationSize = sourceSize;
var destinationPixelFormat = AVPixelFormat.AV_PIX_FMT_BGR24;
using (var vfc = new VideoFrameConverter(sourceSize, sourcePixelFormat, destinationSize, destinationPixelFormat))
{
var frameNumber = 0;
while (vsd.TryDecodeNextFrame(out var frame))
{
var convertedFrame = vfc.Convert(frame);
using (var bitmap = new Bitmap(convertedFrame.width, convertedFrame.height, convertedFrame.linesize[0], PixelFormat.Format24bppRgb, (IntPtr)convertedFrame.data[0]))
bitmap.Save($"frame.{frameNumber:D8}.jpg", ImageFormat.Jpeg);
Console.WriteLine($"frame: {frameNumber}");
frameNumber++;
}
}
}
}
private static unsafe void DecodeAllFramesToImages(string url)
{
using (var vsd = new VideoStreamDecoder(url))
{
Console.WriteLine($"codec name: {vsd.CodecName}");
var info = vsd.GetContextInfo();
info.ToList().ForEach(x => Console.WriteLine($"{x.Key} = {x.Value}"));
var sourceSize = vsd.FrameSize;
var sourcePixelFormat = vsd.PixelFormat;
var destinationSize = sourceSize;
var destinationPixelFormat = AVPixelFormat.AV_PIX_FMT_BGR24;
using (var vfc = new VideoFrameConverter(sourceSize, sourcePixelFormat, destinationSize, destinationPixelFormat))
{
var frameNumber = 0;
while (vsd.TryDecodeNextFrame(out var frame))
{
var convertedFrame = vfc.Convert(frame);
var length = convertedFrame.width * convertedFrame.height * 3;
var data = ToDataArray(convertedFrame.data[0], length);
using (var image = Image.Load(data))
image.Save($"frame.{frameNumber:D8}.jpg");
//using (var bitmap = new Bitmap(convertedFrame.width, convertedFrame.height, convertedFrame.linesize[0], PixelFormat.Format24bppRgb, (IntPtr)convertedFrame.data[0]))
// bitmap.Save($"frame.{frameNumber:D8}.jpg", ImageFormat.Jpeg);
Console.WriteLine($"frame: {frameNumber}");
frameNumber++;
}
}
}
}
