init commit

desktop_global/VideoReader/SaveVideo.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Runtime.InteropServices;
+using FFmpeg.AutoGen;
+
+namespace VideoReader;
+
+internal class SaveVideo
+{
+	private unsafe AVFormatContext* pFormatContext;
+
+	private unsafe AVStream* st;
+
+	private unsafe void Write_Frame(byte[] buff, long number)
+	{
+		AVPacket aVPacket = default(AVPacket);
+		AVPacket* ptr = &aVPacket;
+		ffmpeg.av_init_packet(ptr);
+		IntPtr intPtr = Marshal.AllocHGlobal(buff.Length);
+		Marshal.Copy(buff, 0, intPtr, buff.Length);
+		ptr->data = (sbyte*)intPtr.ToPointer();
+		ptr->size = buff.Length;
+		ptr->pts = ffmpeg.av_rescale_q(number, st->codec->time_base, st->time_base);
+		int num = ffmpeg.av_interleaved_write_frame(pFormatContext, ptr);
+		Marshal.FreeHGlobal(intPtr);
+		ffmpeg.av_free_packet(ptr);
+	}
+}