C# WinForms，使用FFmpeg库播放视频

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace FFmpegPlayer
{
    public partial class Form1 : Form
    {
        private Process ffmpegProcess;

        public Form1()
        {
            InitializeComponent();
        }

        private void btnPlay_Click(object sender, EventArgs e)
        {
            string videoPath = @"path_to_your_video.mp4";
            PlayVideo(videoPath);
        }

        private void PlayVideo(string videoPath)
        {
            if (ffmpegProcess != null && !ffmpegProcess.HasExited)
            {
                ffmpegProcess.Kill();
            }

            ffmpegProcess = new Process
            {
                StartInfo = new ProcessStartInfo
                {
                    FileName = "ffmpeg",
                    Arguments = $"-i \"{videoPath}\" -f rawvideo -pix_fmt bgr24 -",
                    RedirectStandardOutput = true,
                    UseShellExecute = false,
                    CreateNoWindow = true
                }
            };

            ffmpegProcess.OutputDataReceived += FfmegProcess_OutputDataReceived;
            ffmpegProcess.Start();
            ffmpegProcess.BeginOutputReadLine();
        }

        private void FfmegProcess_OutputDataReceived(object sender, DataReceivedEventArgs e)
        {
            if (!string.IsNullOrEmpty(e.Data))
            {
                // Handle the video frame data here
                // For example, you can use a PictureBox to display the video
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (ffmpegProcess != null && !ffmpegProcess.HasExited)
            {
                ffmpegProcess.Kill();
            }
        }
    }
}

private PictureBox pictureBox;

private void Form1_Load(object sender, EventArgs e)
{
    pictureBox = new PictureBox
    {
        Dock = DockStyle.Fill
    };
    this.Controls.Add(pictureBox);
}

private void FfmegProcess_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
    if (!string.IsNullOrEmpty(e.Data))
    {
        // Convert the raw video data to a Bitmap
        byte[] imageData = Convert.FromBase64String(e.Data);
        using (MemoryStream ms = new MemoryStream(imageData))
        {
            Bitmap bitmap = new Bitmap(ms);
            pictureBox.Image = bitmap;
        }
    }
}