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Qt6 ffmpeg 音频和视频(非同步)推流到nginx-rtmp 2

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main.cpp 

#include <QApplication>
#include "Controller.h"

using namespace std;
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    qDebug() << "main thread:" << QThread::currentThreadId();

    Controller *controller = new Controller();
    emit controller->operate("copy");
    a.exec();
}

Rtmp.h 

#pragma once
#include "XMediaEncode.h"
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>

class Rtmp
{
public:
    int sampleRate = 44100;
    int channels = 2;
    int sampleByte = 2;
    int nbSample = 1024;
    int inWidth = 0;
    int inHeight = 0;
    int inPixSize = 3;
    int fps = 0;

    int vindex = 0;
    int aindex = 0;

    std::string inUrl = "rtsp://test:test@192.168.1.4";
    //nginx-rtmp 直播服务器rtmp推流URL
    std::string outUrl = "rtmp://0.0.0.0/live";

    cv::VideoCapture cam;
    cv::Mat frame;
    
    //工厂生产方法
    static Rtmp *Get(unsigned char index = 0);
    virtual bool rtmp_init() = 0;
    virtual AVFrame* Resample(char *data) = 0;
    virtual AVPacket *EncodeAudio(AVFrame *frame) = 0;
    virtual bool SendFrame(AVPacket *pkt,long long pts, int streamIndex) = 0;

    virtual AVFrame* RGBToYUV(char *rgb,int inPixSize) = 0;
    virtual AVPacket *EncodeVideo(AVFrame* frame) = 0;
    virtual ~Rtmp();

protected:
    Rtmp();
};

Rtmp.cpp 

#include "Rtmp.h"
#include <iostream>
using namespace std;
using namespace cv;

class CRtmp : public Rtmp
{
    bool rtmp_init()
    {
        //编码器和像素格式转换
        mediaEncode =  XMediaEncode::Get(0);

        //初始化XMediaEncode
        mediaEncode->register_ffmpeg();
        mediaEncode->channels = channels;
        mediaEncode->nbSample = 1024;
        mediaEncode->sampleRate = sampleRate;
        mediaEncode->inSampleFmt = XSampleFMT::X_S16;
        mediaEncode->outSampleFmt = XSampleFMT::X_FLATP;


        //cam.open(inUrl);
        //1.使用opencv打开rtsp相机
        cam.open(0);
        if (!cam.isOpened())
        {
            throw logic_error("cam open failed");
        }
        cout << inUrl << "cam open success" << endl;
        inWidth = cam.get(CAP_PROP_FRAME_WIDTH);
        inHeight = cam.get(CAP_PROP_FRAME_HEIGHT);
        fps = cam.get(CAP_PROP_FPS);


        //2.初始化像素格式转换的上下文初始化
        //3.输出的数据结构
        mediaEncode->inWidth = inWidth;
        mediaEncode->inHeight = inHeight;
        mediaEncode->outWidth = inWidth;
        mediaEncode->outHeight = inHeight;
        mediaEncode->InitScale();
        if (!mediaEncode->InitVideoCodec())
        {
            std::cout << "InitVideoCodec failed!" << std::flush;
            return false;
        }

        if (!mediaEncode->InitResample())
        {
            std::cout << "InitResample failed" << flush;
            return false;
        }

        if (!mediaEncode->InitAudioCode())
        {
            std::cout << "InitAudioCode failed" << flush;
            return false;
        }

        //a.创建输出封装器上下文
        if (!mediaEncode->Init(outUrl.c_str()))
        {
            std::cout << "avformat_alloc_output_context2" << flush;
            return false;
        }

        //添加视频或者音频
        vindex = mediaEncode->AddStream(mediaEncode->vc);
        std::cout<<"vindex " <<vindex<<endl;
        if (vindex<0)
        {
            std::cout << "mediaEncode->AddStream  failed" << std::endl;
            return false;
        }

        //b.添加音频流
        aindex = mediaEncode->AddStream(mediaEncode->ac);
        std::cout<<"aindex " <<aindex<<endl;
        if (aindex<0)
        {
            std::cout << "AddStream failed" << flush;
            return false;
        }

        //打开rtmp的网络输出IO
        //写入封装头
        if (!mediaEncode->SendHead())
        {
            std::cout << "SendHead failed" << std::endl;
            return false;
        }
    }

    AVFrame *Resample(char *data)
    {
        mediaEncode->Resample(data);
    }

    AVPacket *EncodeAudio(AVFrame *frame)
    {
        mediaEncode->EncodeAudio(frame);
    }
    bool SendFrame(AVPacket *pkt, long long pts, int streamIndex)
    {
        mediaEncode->SendFrame(pkt, pts, streamIndex);
    }

    AVFrame *RGBToYUV(char *rgb, int inPixSize)
    {
        mediaEncode->RGBToYUV(rgb, inPixSize);
    }

    AVPacket *EncodeVideo(AVFrame *frame)
    {
        mediaEncode->EncodeVideo(frame);
    }
private:
    XMediaEncode *mediaEncode = nullptr;
};

Rtmp::Rtmp()
{

}

Rtmp::~Rtmp()
{
    if (cam.isOpened())
        cam.release();
}


Rtmp *Rtmp::Get(unsigned char index)
{
    static bool isFirst = true;
    if (isFirst)
    {
        isFirst = false;
    }
    static CRtmp crtmp[255];
    return &crtmp[index];
}

Controller.h 

#include <QThread>

class Controller : public QObject
{
    Q_OBJECT
public:
    Controller(QObject *parent = nullptr);
    ~Controller();

public slots:
    void handleResults(const QString &des);

signals:
    void operate(const QString &cmd);

private:
    QThread video_thread;
    QThread audio_thread;
};

Controller.cpp 

#include "Controller.h"
#include "AudioRecordWorker.h"
#include "VideoRecordWorker.h"
#include <QDebug>
#include "Rtmp.h"

Controller::Controller(QObject *parent)
    : QObject(parent)
{

    Rtmp *rtmp = Rtmp::Get(0);
    rtmp->rtmp_init();
#if 1
    //音频推流
    AudioRecordWorker *audioRecord = new AudioRecordWorker();
    audioRecord->moveToThread(&audio_thread);
    connect(&audio_thread, &QThread::finished, audioRecord, &QObject::deleteLater);
    connect(this, &Controller::operate, audioRecord, &AudioRecordWorker::doSomething);
    connect(audioRecord, &AudioRecordWorker::resultNotify, this, &Controller::handleResults);
//#else
    //视频推流
    VideoRecordWorker *videoRecord = new VideoRecordWorker();
    videoRecord->moveToThread(&video_thread);
    connect(videoRecord, &VideoRecordWorker::resultNotify, this, &Controller::handleResults);
    connect(&video_thread, &QThread::finished, videoRecord, &QObject::deleteLater);
    connect(this, &Controller::operate, videoRecord, &VideoRecordWorker::doSomething);
#endif
    audio_thread.start();
    video_thread.start();
}

Controller::~Controller()
{
    video_thread.quit();
    video_thread.wait();
    audio_thread.quit();
    audio_thread.wait();
}

void Controller::handleResults(const QString &des)
{
    qDebug() << "handleResults()" << des << "thread:" << QThread::currentThreadId();
}

VideoRecordWorker.h 

#pragma once
#include <QObject>
#include <string>
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
#include "Rtmp.h"

class XMediaEncode;

class VideoRecordWorker : public QObject
{
    Q_OBJECT
public:
    explicit VideoRecordWorker(QObject *parent = nullptr);
    ~VideoRecordWorker();
    void mediaEncodeInit();
    void startRecord();
    void recordParameter(int sampleRate, int channels, int sampleByte , int nbSample);
public slots:
    void doSomething(const QString &cmd);

signals:
    void resultNotify(const QString &des);
private:
    std::string inUrl = "rtsp://test:test@192.168.1.4";
    //nginx-rtmp 直播服务器rtmp推流URL
    std::string outUrl = "rtmp://0.0.0.0/live";

    Rtmp *rtmp = nullptr;

    int sampleRate = 44100;
    int channels = 2;
    int sampleByte = 2;
    int nbSample = 1024;
    int inWidth = 0;
    int inHeight = 0;
    int fps = 0;
};

VideoRecordWorker.cpp 

#include <stdexcept>        // 1. 更换包含头文件
#include <exception>
#include <iostream>
#include <string>
#include <QDebug>
#include <QThread>
#include "VideoRecordWorker.h"
#include "XMediaEncode.h"

extern "C"
{
#include <libswscale/swscale.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswresample/swresample.h>
}

extern "C"
{
#include <libavutil/time.h>
}

using namespace cv;
using namespace std;

VideoRecordWorker::VideoRecordWorker(QObject *parent)
    : QObject(parent)
{

}


VideoRecordWorker::~VideoRecordWorker()
{
    qDebug() << "~VideoRecordWorker()" << "thread:" << QThread::currentThreadId();
}

void VideoRecordWorker::mediaEncodeInit()
{

}

void VideoRecordWorker::doSomething(const QString &cmd)
{
    qDebug() << "doSomething()" << cmd << "thread:" << QThread::currentThreadId();
    startRecord();
    emit resultNotify("doSomething ok!");
}


void VideoRecordWorker::startRecord()
{
    rtmp = Rtmp::Get(0);
    // rtmp->rtmp_init();
    long long beginTime = av_gettime();
    for (;;)
    {
        //读取rtsp视频帧，解码视频帧
        if (!rtmp->cam.grab())
        {
            continue;
        }
        //yuv转为rgb
        //输入的数据结构
        if (!rtmp->cam.retrieve(rtmp->frame))
        {
            continue;
        }

        //rgb to yuv
        int inPixSize = rtmp->frame.elemSize();
        AVFrame *yuv = rtmp->RGBToYUV((char *)rtmp->frame.data, inPixSize);
        if (!yuv) continue;
        long long pts = av_gettime() - beginTime;
        yuv->pts = pts;
        AVPacket *pkt = rtmp->EncodeVideo(yuv);
        if (!pkt) continue;
        rtmp->SendFrame(pkt, pts, rtmp->vindex);
    }
}

void VideoRecordWorker::recordParameter(int sampleRate, int channels, int sampleByte , int nbSample)
{
    sampleRate = sampleRate;
    channels = channels;
    sampleByte = sampleByte;
    nbSample = nbSample;
}

XMediaEncode.h 

#pragma once

#include <string>
#include <QMutex>
class AVFrame;
class AVPacket;
class AVCodecContext;
class AVFormatContext;
class AVStream;


enum XSampleFMT
{
    X_S16 = 1,
    X_FLATP = 8
};

//音视频编码接口类
class XMediaEncode
{
public:
    //输入参数
    int inWidth = 1280;
    int inHeight = 720;
    int channels = 2;
    int sampleRate = 44100;
    XSampleFMT inSampleFmt = X_S16;

    //输出参数
    int outWidth = 1280;
    int outHeight = 720;
    int bitrate = 4000000;//压缩后每秒视频的bit位大小50KB
    int fps = 25;
    int nbSample = 1024;
    XSampleFMT outSampleFmt = X_FLATP;

    //工厂生产方法
    static XMediaEncode *Get(unsigned char index = 0);

    virtual void register_ffmpeg() = 0;

    //初始化封装器的上下文
    virtual bool Init(const char *url) = 0;

    //初始化像素格式转换的上下文初始化
    virtual bool InitScale() = 0;

    //音频重采样上下文初始化
    virtual bool InitResample() = 0;

    //音频编码器初始化
    virtual bool InitAudioCode() = 0;

    virtual AVFrame *Resample(char *data) = 0;

    virtual AVFrame *RGBToYUV(char *rgb, int inPixSize) = 0;

    //编码器的初始化
    virtual bool InitVideoCodec() = 0;

    //视频编码
    virtual AVPacket *EncodeVideo(AVFrame *frame) = 0;

    //音频编码
    virtual AVPacket *EncodeAudio(AVFrame *frame) = 0;

    //添加视频或者音频
    virtual bool AddStream(AVCodecContext *c) = 0;

    //打开rtmp网络IO，发送封装头
    virtual bool SendHead() = 0;

    //rtmp 帧推流
    //virtual bool SendFrame(AVPacket *pkt) = 0;
    virtual bool SendFrame(AVPacket *pkt, long long pts, int streamIndex) = 0;

    virtual ~XMediaEncode();

    //视频编码器的上下文
    AVCodecContext *vc = 0;

    //音频编码器的上下文
    AVCodecContext *ac = 0; //音频编码器上下文
    AVFormatContext *ic = 0;
protected:
    XMediaEncode();
    //rtmp flv 封装器
    std::string outUrl = "";
    AVStream *vs = 0;
    AVStream *as = 0;
    QMutex mutex;
};

XMediaEncode.cpp 

#include "XMediaEncode.h"
#include <iostream>
#include <QDebug>
#include <QMutex>
#include <QThread>
using namespace std;

extern "C"
{
#include <libswscale/swscale.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswresample/swresample.h>
}

class CXMediaEncode: public XMediaEncode
{
public:
    void close()
    {
        if (vsc)
        {
            sws_freeContext(vsc);
            vsc = NULL;
        }
        if (asc)
        {
            swr_free(&asc);
        }
        if (yuv)
        {
            av_frame_free(&yuv);
        }

        if (vc)
        {
            avcodec_free_context(&vc);
        }

        if (pcm)
        {
            av_frame_free(&pcm);
        }

        if (ic)
        {
            avformat_close_input(&ic);
            vs = NULL;
        }
        vc = NULL;
        outUrl = "";

        vpts = 0;
        av_packet_unref(&vpacket);
        apts = 0;
        av_packet_unref(&apacket);
    }

    void register_ffmpeg()
    {
        //注册所有的编解码器
        avcodec_register_all();

        //注册所有的封装器
        av_register_all();

        //注册所有网络协议
        avformat_network_init();
    }

    bool Init(const char *url)
    {
        ///5 封装器和视频流配置
        //a.创建输出封装器上下文
        int ret = avformat_alloc_output_context2(&ic, 0, "flv", url);
        this->outUrl = url;
        if (ret != 0)
        {
            char buf[1024] = {0};
            av_strerror(ret, buf, sizeof(buf) - 1);
            cout << buf;
            return false;
        }
        return true;
    }


    bool InitAudioCode()
    {
        codec = avcodec_find_encoder(AV_CODEC_ID_AAC);
        if (!CreateAudioCodec(AV_CODEC_ID_AAC))
        {
            std::cout << "CreateAudioCodec failed" << std::endl;
            return false;
        }
        std::cout << "InitAudioCode " << std::endl;
        ac->bit_rate = 40000;
        ac->sample_rate = sampleRate;
        ac->sample_fmt = AV_SAMPLE_FMT_FLTP;
        ac->channels = channels;
        ac->channel_layout = av_get_default_channel_layout(channels);

        return OpenCodec(ac);
    }

    bool InitVideoCodec()
    {

        //4初始化编码上下文
        //a 找到编码器
        codec = avcodec_find_encoder(AV_CODEC_ID_H264);
        if (!CreateVideoCodec(AV_CODEC_ID_H264))
        {
            cout << "Can't find h264 encoder!" << endl;
            return false;
        }
        cout << "InitVideoCodec " << endl;
        vc->bit_rate = 50 * 1024 * 8; //压缩后每秒视频的bit位大小 50kb
        vc->width = outWidth;
        vc->height = outHeight;
        //vc->time_base = {1, fps}; //时间基数
    vc->time_base = { 1,1000000 };
        vc->framerate = {fps, 1};

        //画面组的大小，多少帧一个关键帧
        vc->gop_size = 50;
        vc->max_b_frames = 0;
        vc->pix_fmt = AV_PIX_FMT_YUV420P;

        //d 打开编码器
        return OpenCodec(vc);
    }

    AVPacket *EncodeAudio(AVFrame *frame)
    {
        //pts 运算
        //nb_sample/sample_rate = 一帧音频的秒数
        //timebase pts = sec*timebase.den
        pcm->pts = apts;
        
        if(apts == pcm->pts)
        {
            pcm->pts += 1000;
        }
        apts = pcm->pts;
        /
        //apts += av_rescale_q(pcm->nb_samples, {1, sampleRate}, ac->time_base);
        int ret = avcodec_send_frame(ac, pcm);
        if (ret != 0) return NULL;

        av_packet_unref(&apacket);
        ret = avcodec_receive_packet(ac, &apacket);
        if (ret != 0) return NULL;

        cout << apacket.size << " " << flush;
        return &apacket;
    }

    AVPacket *EncodeVideo(AVFrame *frame)
    {
        av_packet_unref(&vpacket);

        //h264编码
        // frame->pts = vpts;
        // vpts++;
        int ret = avcodec_send_frame(vc, frame);
        if (ret != 0)
            return NULL;
        //每次都会调用av_frame_unref(frame)
        ret = avcodec_receive_packet(vc, &vpacket);
        if (ret != 0 || vpacket.size <= 0)
            return NULL;
        return &vpacket;
    }

    bool InitScale()
    {
        //2.初始化格式转换的上下文
        vsc = sws_getCachedContext(vsc,
                                   inWidth, inHeight, AV_PIX_FMT_BGR24, //原宽度高度
                                   outWidth, outHeight, AV_PIX_FMT_YUV420P, //输出宽，高，像素格式
                                   SWS_BICUBIC,//尺寸变化算法
                                   0, 0, 0
                                  );
        if (!vsc)
        {
            cout << "sws_getCachedContext failed!";
            return false;
        }
        //3.输出的数据结构
        yuv = av_frame_alloc();
        yuv->format = AV_PIX_FMT_YUV420P;
        yuv->width = inWidth;
        yuv->height = inHeight;
        yuv->pts = 0;
        //分配yuv空间
        int ret = av_frame_get_buffer(yuv, 32);
        if (ret != 0)
        {
            char buf[1024] = {0};
            av_strerror(ret, buf, sizeof(buf) - 1);
            throw logic_error(buf);
        }
        return true;
    }

    AVFrame *RGBToYUV(char *rgb, int inPixSize)
    {
        //rgb to yuv
        //输入的数据格式
        uint8_t *indata[AV_NUM_DATA_POINTERS] = {0};
        //bgrbgrbgr
        //plane inData[0]bbbb gggg rrrr
        indata[0] = (uint8_t *)rgb;
        int insize[AV_NUM_DATA_POINTERS] = {0};
        //一行（宽）数据的字节数
        insize[0] = inWidth * inPixSize;

        int h = sws_scale(vsc, indata, insize, 0, inHeight, //输入数据
                          yuv->data, yuv->linesize);
        if (h <= 0)
        {
            return NULL;
        }
        return yuv;
    }

    bool InitResample()
    {
        //音频重采样 上下文初始化
        asc = swr_alloc_set_opts(asc,
                                 av_get_default_channel_layout(channels), (AVSampleFormat)outSampleFmt, sampleRate, //输出格式
                                 av_get_default_channel_layout(channels), (AVSampleFormat)inSampleFmt, sampleRate, //输入格式
                                 0, 0);
        if (!asc)
        {
            cout << "swr_alloc_set_opts failed!";
            return false;
        }
        int ret = swr_init(asc);
        if (ret != 0)
        {
            char err[1024] = {0};
            av_strerror(ret, err, sizeof(err) - 1);
            cout << err << endl;
            return false;
        }
        std::cout << "音频重采样上下文初始化成功" << endl;

        //音频从采样空间的分配
        pcm = av_frame_alloc();
        pcm->format = outSampleFmt;
        pcm->channels = channels;
        pcm->channel_layout = av_get_default_channel_layout(channels);
        pcm->nb_samples = nbSample; //一帧音频一个通道的采样数
        ret = av_frame_get_buffer(pcm, 0); //给pcm分配存储空间
        if (ret != 0)
        {
            char err[1024] = {0};
            av_strerror(ret, err, sizeof(err) - 1);
            cout << err << endl;
            return false;
        }
        return true;
    }


    AVFrame *Resample(char *data)
    {
        const uint8_t *indata[AV_NUM_DATA_POINTERS] = {0};
        indata[0] = (uint8_t *)data;
        int len = swr_convert(
                      asc, pcm->data, pcm->nb_samples, //输出参数，输出存储地址和样本数量
                      indata, pcm->nb_samples);

        //        qDebug()<<"swr_convert = "<<len<<" ";
        if (len <= 0)
        {
            return NULL;
        }
        return pcm;
    }

    bool AddStream(AVCodecContext *c)
    {

        if (!c) return false;

        //b.添加视频流
        AVStream *st = avformat_new_stream(ic, NULL);
        if (!st)
        {
            cout << "avformat_new_stream failed" << endl;
            return false;
        }

        st->codecpar->codec_tag = 0;

        //从编码器复制参数
        avcodec_parameters_from_context(st->codecpar, c);
        av_dump_format(ic, 0, outUrl.c_str(), 1);
        if (c->codec_type == AVMEDIA_TYPE_VIDEO)
        {
            vc = c;
            vs = st;
        }
        else if (c->codec_type == AVMEDIA_TYPE_AUDIO)
        {
            ac = c;
            as = st;
        }

        return st->index;
    }

    bool SendHead()
    {
        std::cout << "start SendHead " << std::endl;
        //打开rtmp的网络输出IO
        int ret = avio_open(&ic->pb, outUrl.c_str(), AVIO_FLAG_WRITE);
        if (ret != 0)
        {

            char buf[1024] = {0};
            av_strerror(ret, buf, sizeof(buf) - 1);
            cout << "avio_open failed " << buf << endl;
            return false;
        }

        //写入封装头
        ret = avformat_write_header(ic, NULL);
        if (ret != 0)
        {
            char buf[1024] = {0};
            av_strerror(ret, buf, sizeof(buf) - 1);
            cout << "avformat_write_header failed " << buf << endl;
            return false;
        }
        return true;
    }

    bool SendFrame(AVPacket *pkt, long long pts, int streamIndex)
    {
        pkt->pts = pts;
        pkt->stream_index = streamIndex;
        if (!pkt || pkt->size <= 0 || !pkt->data)
        {
            std::cout << "pkt is NULL" << flush;
            return false;
        }
        AVRational stime;
        AVRational dtime;
        //判断音视频
        std::cout<<"vc = "<<vc<<"vs = "<<vs<<"pkt->stream_index= "<<pkt->stream_index<<std::endl;
        std::cout<<"ac = "<<ac<<"as = "<<as<<"pkt->stream_index= "<<pkt->stream_index<<std::endl;

        if (vc && vs && pkt->stream_index == vs->index)
        {
            stime = vc->time_base;
            dtime = vs->time_base;
        }
        else if (ac && as && pkt->stream_index == as->index)
        {
            stime = ac->time_base;
            dtime = as->time_base;
        }
        else
        {
            return false;
        }
        //推流
        pkt->pts = av_rescale_q(pkt->pts, stime, dtime);
        pkt->dts = av_rescale_q(pkt->dts, stime, dtime);
        pkt->duration = av_rescale_q(pkt->duration, stime, dtime);
        if (vc && vs && pkt->stream_index == vs->index)
        {
            std::cout << "vpkt->pts = " << pkt->pts << " vpkt->dts = " << pkt->dts << "vpkt->duration = " << pkt->duration << std::endl;
        std::cout << "vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv"<< std::endl;
                        
        }
        else if (ac && as && pkt->stream_index == as->index)
    {
        std::cout << "apkt->pts = " << pkt->pts << " apkt->dts = " << pkt->dts << "apkt->duration = " << pkt->duration << std::endl;
        std::cout << "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"<< std::endl;
    }
       
        int ret = av_interleaved_write_frame(ic, pkt);
        if (ret == 0)
        {
            cout << "#" << flush;
        }
        return true;
    }

private:
    bool OpenCodec(AVCodecContext *c)
    {
        //打开音频编码器
        int ret = avcodec_open2(c, 0, 0);
        if (ret != 0)
        {
            char err[1024] = {0};
            av_strerror(ret, err, sizeof(err) - 1);
            cout << err << endl;
            avcodec_free_context(&c);
            cout << "avcodec_open2 failed!" << endl;
            return false;
        }
        cout << "avcodec_open2 success!" << endl;
        return true;
    }

    bool CreateAudioCodec(AVCodecID cid)
    {
        //一次读取一帧音频的字节数
        ///4 初始化音频编码器
        AVCodec *codec = avcodec_find_encoder(cid);
        if (!codec)
        {
            cout << "avcodec_find_encoder  failed!" << endl;
            return false;
        }
        ac = avcodec_alloc_context3(codec);
        if (!ac)
        {
            cout << "avcodec_alloc_context3 cid failed!" << endl;
            return false;
        }
        cout << "avcodec_alloc_context3 success!" << endl;
        ac->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
        ac->thread_count = 4;

        return true;
    }

    bool CreateVideoCodec(AVCodecID cid)
    {
        //一次读取一帧音频的字节数
        ///4 初始化音频编码器
        AVCodec *codec = avcodec_find_encoder(cid);
        if (!codec)
        {
            cout << "avcodec_find_encoder  failed!" << endl;
            return false;
        }
        vc = avcodec_alloc_context3(codec);
        if (!vc)
        {
            cout << "avcodec_alloc_context3 cid failed!" << endl;
            return false;
        }
        cout << "avcodec_alloc_context3 success!" << endl;
        vc->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
        vc->thread_count = 4;
        return true;
    }

    SwsContext *vsc = NULL; //像素格式上下文
    SwrContext *asc = NULL; //像素格式上下文
    AVFrame *yuv = NULL;
    AVFrame *pcm = NULL;    //输出的pcm
    AVPacket vpacket = {0}; //视频帧
    AVPacket apacket = {0}; //音频帧
    AVCodec *codec = NULL; //音频重采样的上下文
    int vpts = 0;
    int apts = 0;
};


XMediaEncode *XMediaEncode::Get(unsigned char index)
{
    static bool isFirst = true;
    if (isFirst)
    {
        //注册所有的编码器
        avcodec_register_all();
        isFirst = false;
    }
    static CXMediaEncode cxm[255];
    return &cxm[index];
}

XMediaEncode::XMediaEncode()
{

}

XMediaEncode::~XMediaEncode()
{

}

AudioRecordWorker.h 


#include <QObject>
#include <QAudioSource>
#include <QAudioFormat>
#include <QMediaDevices>
#include <QAudioInput>
#include <string>
#include "Rtmp.h"

class AudioRecordWorker : public QObject
{
    Q_OBJECT
public:
    explicit AudioRecordWorker(QObject *parent = nullptr);
    ~AudioRecordWorker();
    void mediaEncodeInit();
    void startRecord();
    void recordParameter(int sampleRate, int channels, int sampleByte , int nbSample);
public slots:
    void doSomething(const QString &cmd);

signals:
    void resultNotify(const QString &des);
private:
    QAudioFormat format;
    QAudioDevice info;
    QAudioSource *audio = nullptr;
    QIODevice *io = nullptr;
    std::string outUrl = "rtmp://0.0.0.0/live";
    Rtmp *rtmp = nullptr;

    int sampleRate = 44100;
    int channels = 2;
    int sampleByte = 2;
    int nbSample = 1024;
};

AudioRecordWorker.cpp 


#include <QDebug>
#include <QThread>
#include <iostream>
#include "AudioRecordWorker.h"
#include "VideoRecordWorker.h"


extern "C"
{
#include <libswscale/swscale.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswresample/swresample.h>
}

extern "C"
{
#include <libavutil/time.h>
}

using namespace std;

AudioRecordWorker::AudioRecordWorker(QObject *parent)
    : QObject(parent)
{
    //1.qt音频开始录制
    format.setSampleRate(sampleRate);
    format.setChannelCount(channels);
    format.setSampleFormat(QAudioFormat::Int16);

    info = QMediaDevices::defaultAudioInput();
    if (!info.isFormatSupported(format))
    {
        qWarning() << "Default format not supported, trying to use the nearest.";
    }
    audio = new QAudioSource(format, this);
    qDebug() << "AudioRecordWorker()" << "thread:" << QThread::currentThreadId();
    //开始录制音频
    io = audio->start();
}


AudioRecordWorker::~AudioRecordWorker()
{
    qDebug() << "~AudioRecordWorker()" << "thread:" << QThread::currentThreadId();
}

void AudioRecordWorker::doSomething(const QString &cmd)
{
    qDebug() << "doSomething()" << cmd << "thread:" << QThread::currentThreadId();
    startRecord();
    emit resultNotify("doSomething ok!");
}

void AudioRecordWorker::startRecord()
{
    rtmp = Rtmp::Get(0);
    // rtmp->rtmp_init();

    int frameSize = rtmp->nbSample * channels * sampleByte;
    char *buf = new char[frameSize];
    qDebug() << "size = " << frameSize;
    int size = 0;
    long long beginTime = av_gettime();
    for (;;)
    {
        qint64 rev_len = io->bytesAvailable();
        //std::cout<<rev_len<<std::endl;
        //一次读取一帧音频
        if (rev_len < frameSize)
        {
            QThread::msleep(1);
            continue;
        }

        int size = 0;
        while (size != frameSize)
        {
            int len = io->read(buf + size, frameSize - size);
            size += len;
        }

        if (size != frameSize) continue;
        //已经读一帧源数据
        //cout << size << " "<<flush;
        //重采样源数据
        AVFrame *pcm = rtmp->Resample(buf);
        if (!pcm)
        {
            std::cout << "pcm == NULL" << flush;
        }
        //pts 运算
        //nb_sample/sample_rate = 一帧音频的秒数
        //timebase pts = sec*timebase.den
        long long pts = av_gettime() - beginTime;
        pcm->pts = pts;
        AVPacket *pkt =  rtmp->EncodeAudio(pcm);
        if (!pkt) continue;
        //cout<<pkt->size<<" "<<flush;

        //推流
        // std::cout<<"SendFrame"<<flush;
        std::cout << "audio_pts = " << pts << std::endl;
        rtmp->SendFrame(pkt, pts, rtmp->aindex);
    }

    delete buf;
}


void AudioRecordWorker::recordParameter(int sampleRate, int channels, int sampleByte , int nbSample)
{
    sampleRate = sampleRate;
    channels = channels;
    sampleByte = sampleByte;
    nbSample = nbSample;
}

CMakeLists.txt 

cmake_minimum_required(VERSION 3.1)
project(opencv_example_project)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)

set(CMAKE_BUILD_TYPE "Debug")
set(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -g2 -ggdb")
set(CMAKE_CXX_FLAGS_RELEASE "$ENV{CXXFLAGS} -O3 -Wall")

find_package(OpenCV REQUIRED)

message(STATUS "OpenCV library status:")
message(STATUS "    config: ${OpenCV_DIR}")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

find_library(AVCODEC_LIBRARY avcodec)
find_library(AVFORMAT_LIBRARY avformat)
find_library(AVUTIL_LIBRARY avutil)
find_library(AVDEVICE_LIBRARY avdevice)

find_package(Qt6 COMPONENTS Core)
find_package(Qt6 COMPONENTS Gui)
find_package(Qt6 COMPONENTS Multimedia)
find_package(Qt6 COMPONENTS Widgets)


add_executable(qt_audio_rtmp Rtmp.cpp VideoRecordWorker.cpp XMediaEncode.cpp Controller.cpp main.cpp AudioRecordWorker.cpp)

target_link_libraries(qt_audio_rtmp PRIVATE 
    ${OpenCV_LIBS} 
    Qt::Core
    Qt::Gui
    Qt::Multimedia
    Qt::Widgets
    pthread 
    swresample 
    m 
    swscale 
    avformat    
    avcodec 
    avutil 
    avfilter 
    avdevice 
    postproc 
    z 
    lzma  
    rt)


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