目录
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);
- }
- }
- }
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