hdmi视频数据录像保存的qt源代码

以下是保存HDMI视频数据录像的Qt源代码示例：

#include <QCoreApplication>
#include <QThread>
#include <QDateTime>
#include <QFile>
#include <QDataStream>

extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavdevice/avdevice.h>
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // 初始化ffmpeg库
    av_register_all();
    avdevice_register_all();

    AVInputFormat *inputFormat = av_find_input_format("dshow");
    AVDictionary *options = NULL;
    av_dict_set(&options, "video_size", "1920x1080", 0);
    av_dict_set(&options, "pixel_format", "uyvy422", 0);
    av_dict_set(&options, "framerate", "30", 0);
    av_dict_set(&options, "buffer_size", "1048576", 0);

    AVFormatContext *formatContext = NULL;
    int ret = avformat_open_input(&formatContext, "video=HD Webcam:audio=麦克风 (HD Webcam)", inputFormat, &options);
    if (ret != 0) {
        qDebug() << "avformat_open_input error" << av_err2str(ret);
        return 1;
    }

    // 查找视频流
    int videoStreamIndex = -1;
    for (int i = 0; i < formatContext->nb_streams; i++) {
        if (formatContext->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
            videoStreamIndex = i;
            break;
        }
    }

    if (videoStreamIndex == -1) {
        qDebug() << "can't find video stream";
        return 1;
    }

    // 打开视频解码器
    AVCodecParameters *videoCodecpar = formatContext->streams[videoStreamIndex]->codecpar;
    AVCodec *videoCodec = avcodec_find_decoder(videoCodecpar->codec_id);
    AVCodecContext *videoCodecContext = avcodec_alloc_context3(videoCodec);
    ret = avcodec_parameters_to_context(videoCodecContext, videoCodecpar);
    if (ret != 0) {
        qDebug() << "avcodec_parameters_to_context error" << av_err2str(ret);
        return 1;
    }
    ret = avcodec_open2(videoCodecContext, videoCodec, NULL);
    if (ret != 0) {
        qDebug() << "avcodec_open2 error" << av_err2str(ret);
        return 1;
    }

    // 准备视频帧
    AVFrame *videoFrame = av_frame_alloc();
    if (videoFrame == NULL) {
        qDebug() << "av_frame_alloc error";
        return 1;
    }

    // 打开输出文件
    QDateTime currentDateTime = QDateTime::currentDateTime();
    QString fileName = currentDateTime.toString("yyyyMMdd_hhmmss") + ".avi";
    QFile file(fileName);
    if (!file.open(QIODevice::WriteOnly)) {
        qDebug() << "open file error" << fileName;
        return 1;
    }

    // 写入文件头
    AVOutputFormat *outputFormat = av_guess_format("avi", NULL, NULL);
    AVFormatContext *outFormatContext = NULL;
    ret = avformat_alloc_output_context2(&outFormatContext, outputFormat, NULL, fileName.toUtf8().data());
    if (ret != 0) {
        qDebug() << "avformat_alloc_output_context2 error"