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);
		ffmpeg.av_interleaved_write_frame(pFormatContext, ptr);
		Marshal.FreeHGlobal(intPtr);
		ffmpeg.av_free_packet(ptr);
	}
}