WPF桌面端开发7-使用FFMpeg进行推流

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WPF桌面端开发

复制FFMpeg到目标目录

项目->属性->生成事件->生成前事件命令行

添加如下

复制目录

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xcopy /Y /i /e $(ProjectDir)\ffmpeg $(TargetDir)\ffmpeg

复制文件

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xcopy  /Y /d $(ProjectDir)\ffmpeg\* $(TargetDir)\ffmpeg\

获取音频输入设备

使用NuGet添加 NAudio

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using NAudio.CoreAudioApi;
using System.Collections.Generic;

namespace ZJClassTool.Utils
{
    public class ZJAudioModel : ZJNotifyModel
    {
        private string _name;

        public string name
        {
            get { return _name; }
            set
            {
                _name = value; OnPropertyChanged("name");
            }
        }

        public string id { get; set; }
        private bool _selected = true;

        public bool selected
        {
            get { return _selected; }
            set { _selected = value; OnPropertyChanged("selected"); }
        }

        public static List<ZJAudioModel> getAudioDevice()
        {
            List<ZJAudioModel> audioList = new List<ZJAudioModel>();
            var enumerator = new NAudio.CoreAudioApi.MMDeviceEnumerator();

            //允许你在某些状态下枚举渲染设备
            var endpoints = enumerator.EnumerateAudioEndPoints(DataFlow.Capture, DeviceState.Active);
            foreach (var endpoint in endpoints)
            {
                ZJAudioModel audioModel = new ZJAudioModel();
                audioModel.name = endpoint.FriendlyName;
                audioModel.id = endpoint.ID;
                audioList.Add(audioModel);
            }
            return audioList;
        }
    }
}

使用FFmpeg推流

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using System;
using System.Diagnostics;
using System.IO;

namespace ZJClassTool.Utils
{
    internal class ZJRtmpPush
    {
        // ffmpeg进程
        public static Process p = new Process();

        // ffmpeg.exe实体文件路径
        private static string ffmpegPath = AppDomain.CurrentDomain.BaseDirectory + "ffmpeg\\ffmpeg.exe";

        /// <summary>
        /// 功能: 开始录制
        /// </summary>
        public static void Start(string audioDevice, string outFilePath)
        {
            if (File.Exists(outFilePath))
            {
                File.Delete(outFilePath);
            }

            /*转码，视频录制设备：gdigrab；录制对象：桌面；
             * 音频录制方式：dshow；
             * 视频编码格式：h.264；*/
            ProcessStartInfo startInfo = new ProcessStartInfo(ffmpegPath);
            startInfo.WindowStyle = ProcessWindowStyle.Hidden;

            var parastr = string.Format("-f gdigrab -framerate 15 -i desktop -f dshow -i audio=\"{0}\" -vcodec libx264 -preset:v ultrafast -tune:v zerolatency -acodec libmp3lame \"{1}\"", audioDevice, outFilePath);
            startInfo.Arguments = parastr;
            p.StartInfo = startInfo;

            p.Start();
        }

        /// <summary>
        /// 功能: 开始推流
        /// </summary>
        public static void StartPush(string audioDevice, string pushUrl)
        {
            /*转码，视频录制设备：gdigrab；录制对象：桌面；
             * 音频录制方式：dshow；
             * 视频编码格式：h.264；*/
            ProcessStartInfo startInfo = new ProcessStartInfo(ffmpegPath);
            startInfo.WindowStyle = ProcessWindowStyle.Hidden;
            var parastr = string.Format("-f gdigrab -framerate 15 -i desktop -f dshow -i audio=\"{0}\" -filter:v scale=w=trunc(oh*a/2)*2:h=720 -vcodec libx264 -preset:v ultrafast -acodec libmp3lame -maxrate 1000k -pix_fmt yuv422p -f flv \"{1}\"", audioDevice, pushUrl);
            startInfo.Arguments = parastr;
            p.StartInfo = startInfo;
            // Console.WriteLine("parastr:" + parastr);
            p.Start();
        }

        /// <summary>
        /// 功能: 停止录制
        /// </summary>
        public static void Stop()
        {
            p.Kill();
            p.StartInfo.Arguments = "";
        }
    }
}

实际上执行的推流命令

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ffmpeg -f gdigrab -framerate 15 -i desktop -f dshow -i audio="Internal Microphone (Cirrus Logic CS8409 (AB 51))" -filter:v scale=w=trunc(oh*a/2)*2:h=720 -vcodec libx264 -preset:v ultrafast -acodec libmp3lame -maxrate 1000k -pix_fmt yuv422p -f flv "rtmp://live.psvmc.cn/test/01"

具体参数根据自己实际情况调整即可