C#利用ffmpeg和opencv进行视频的解码播放

news2024/9/22 19:28:44

说明

效果

项目

代码

下载

说明

利用周杰大佬的开源项目 Sdcb.FFmpeg

项目地址：https://github.com/sdcb/Sdcb.FFmpeg/

效果

C#利用ffmpeg和opencv进行视频的解码播放

项目

代码

using OpenCvSharp;
using Sdcb.FFmpeg.Codecs;
using Sdcb.FFmpeg.Formats;
using Sdcb.FFmpeg.Raw;
using Sdcb.FFmpeg.Toolboxs.Extensions;
using System;
using System.Collections.Concurrent;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Sdcb.FFmpegDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

CancellationTokenSource cts;

ConcurrentQueue<Mat> matQueue = new ConcurrentQueue<Mat>();

/// <summary>
/// 播放
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
cts = new CancellationTokenSource();

//string rtsp_url = "test_car_person_1080P.mp4";
string rtsp_url = "rtsp://192.168.3.62/ch1";

Task.Run(() => DecodeRTSP(rtsp_url, cts.Token));

Task.Run(() =>
{
Mat mat = new Mat();
while (true)
{
if (cts.IsCancellationRequested) break;
//Console.WriteLine("matQueue.Count:" + matQueue.Count);
if (matQueue.TryDequeue(out mat))
{
Cv2.ImShow(rtsp_url, mat);
Cv2.WaitKey(1);
mat.Dispose();
}
}
Cv2.DestroyAllWindows();
});
}

void DecodeRTSP(string url, CancellationToken cancellationToken = default)
{
FormatContext fc = FormatContext.OpenInputUrl(url);
fc.LoadStreamInfo();
MediaStream videoStream = fc.GetVideoStream();

CodecContext videoDecoder = new CodecContext(Codec.FindDecoderByName("h264"));
videoDecoder.FillParameters(videoStream.Codecpar);
videoDecoder.Open();

foreach (Sdcb.FFmpeg.Utils.Frame frame in fc
.ReadPackets(videoStream.Index)
.DecodePackets(videoDecoder)
.ConvertVideoFrames(() => (videoDecoder.Width, videoDecoder.Height), AVPixelFormat.Bgr24))
{
if (cancellationToken.IsCancellationRequested) break;

try
{
byte[] data = new byte[frame.Linesize[0] * frame.Height];
Marshal.Copy(frame.Data._0, data, 0, data.Length);
OpenCvSharp.Mat mat = new OpenCvSharp.Mat(frame.Height, frame.Width, MatType.CV_8UC3, data); ;
matQueue.Enqueue(mat);
}
finally
{
frame.Unref();
}
}
cts.Cancel();
videoDecoder.Dispose();
fc.Dispose();
}

/// <summary>
/// 停止
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
cts.Cancel();
}

private void Form1_Load(object sender, EventArgs e)
{
Sdcb.FFmpeg.Utils.FFmpegLogger.LogWriter = (level, msg) => Console.WriteLine(msg);
}
}

}

using OpenCvSharp;
using Sdcb.FFmpeg.Codecs;
using Sdcb.FFmpeg.Formats;
using Sdcb.FFmpeg.Raw;
using Sdcb.FFmpeg.Toolboxs.Extensions;
using System;
using System.Collections.Concurrent;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Sdcb.FFmpegDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        CancellationTokenSource cts;

        ConcurrentQueue<Mat> matQueue = new ConcurrentQueue<Mat>();

        /// <summary>
        /// 播放
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            cts = new CancellationTokenSource();

            //string rtsp_url = "test_car_person_1080P.mp4";
            string rtsp_url = "rtsp://192.168.3.62/ch1";

            Task.Run(() => DecodeRTSP(rtsp_url, cts.Token));

            Task.Run(() =>
            {
                Mat mat = new Mat();
                while (true)
                {
                    if (cts.IsCancellationRequested) break;
                    //Console.WriteLine("matQueue.Count:" + matQueue.Count);
                    if (matQueue.TryDequeue(out mat))
                    {
                        Cv2.ImShow(rtsp_url, mat);
                        Cv2.WaitKey(1);
                        mat.Dispose();
                    }
                }
                Cv2.DestroyAllWindows();
            });
        }

        void DecodeRTSP(string url, CancellationToken cancellationToken = default)
        {
            FormatContext fc = FormatContext.OpenInputUrl(url);
            fc.LoadStreamInfo();
            MediaStream videoStream = fc.GetVideoStream();

            CodecContext videoDecoder = new CodecContext(Codec.FindDecoderByName("h264"));
            videoDecoder.FillParameters(videoStream.Codecpar);
            videoDecoder.Open();

            foreach (Sdcb.FFmpeg.Utils.Frame frame in fc
                .ReadPackets(videoStream.Index)
                .DecodePackets(videoDecoder)
                .ConvertVideoFrames(() => (videoDecoder.Width, videoDecoder.Height), AVPixelFormat.Bgr24))
            {
                if (cancellationToken.IsCancellationRequested) break;

                try
                {
                    byte[] data = new byte[frame.Linesize[0] * frame.Height];
                    Marshal.Copy(frame.Data._0, data, 0, data.Length);
                    OpenCvSharp.Mat mat = new OpenCvSharp.Mat(frame.Height, frame.Width, MatType.CV_8UC3, data); ;
                    matQueue.Enqueue(mat);
                }
                finally
                {
                    frame.Unref();
                }
            }
            cts.Cancel();
            videoDecoder.Dispose();
            fc.Dispose();
        }


        /// <summary>
        /// 停止
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            cts.Cancel();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Sdcb.FFmpeg.Utils.FFmpegLogger.LogWriter = (level, msg) => Console.WriteLine(msg);
        }
    }

}