qt_ffmpeg_client/mainwindow.cpp

#include "mainwindow.h"
#include "./ui_mainwindow.h"
#include <QFileDialog>
#include <QFileInfo>
#include <iostream>

using namespace std;
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    // 选择修改分辨率
    connect(ui->en_mdf_res, SIGNAL(stateChanged(int)), this, SLOT(en_mdf_res_state_change(int)));
    en_mdf_res_state_change(Qt::Unchecked);
    // bt_browse_press
    connect(ui->bt_browse, SIGNAL(clicked()), this, SLOT(press_bt_browse()));
    // bt_start_change
    connect(ui->bt_start_change, SIGNAL(clicked()), this, SLOT(ffmpeg_run()));
    //ffmpeg_info
    connect(&ffmpeg_process, SIGNAL(readyReadStandardOutput()), this, SLOT(ffmpeg_info_read()));
    // def_cfg
    connect(ui->bt_def_cfg, SIGNAL(clicked()), this, SLOT(def_cfg()));
    // hor_change
    connect(ui->bt_hor_change, SIGNAL(clicked()), this, SLOT(hor_change_event()));
    // ver_change
    connect(ui->bt_ver_change, SIGNAL(clicked()), this, SLOT(ver_change_event()));
}
void MainWindow::hor_change_event()
{
    ui->hor_val->setText("-1");
}
void MainWindow::ver_change_event()
{
    ui->ver_val->setText("-1");
}
void MainWindow::ffmpeg_info_read() 
{
    cout << "ffmpeg_info_read" << endl;
    QString ffmpeg_info = ffmpeg_process.readAllStandardOutput();
    if (ffmpeg_info.isEmpty())
    {
        cout << "No output from ffmpeg" << endl;
    }
    else
    {
        ui->lb_info->setText(ffmpeg_info);
        ui->lb_info->repaint();
        cout << "ffmpeg_info: " << ffmpeg_info.toStdString() << endl;
    }
}
void MainWindow::def_cfg(){
    en_mdf_res_state_change(Qt::Checked);
    ui->en_mdf_res->setChecked(true);
    ui->hor_val->setText("640");
    ui->ver_val->setText("-1");
    ui->cb_fps_change->setChecked(true);
    ui->le_fps_val->setText("5");
}
void MainWindow::ffmpeg_run()
{
    cout << "ffmpeg_run" << endl;
    // deal cmd
    QString cmd = "./ffmpeg.exe -i ";
    if (ui->le_src_file->text().isEmpty())
    {
        cout << "src file is empty" << endl;
        return;
    }
    cmd += ui->le_src_file->text();
    if (ui->cb_fps_change->isChecked())
    {
        cmd += " -r ";
        cmd += ui->le_fps_val->text();
    }
    if (ui->en_mdf_res->isChecked())
    {
        cmd += " -vf scale=";
        cmd += ui->hor_val->text();
        cmd += ":";
        cmd += ui->ver_val->text();
    }
    if (ui->le_dest_file->text().isEmpty())
    {
        cout << "dest file is empty" << endl;
        return;
    }
    cmd += " ";
    cmd += ui->le_dest_file->text();
    cmd += ui->cb_dest_file_end->currentText();
    cout << "cmd: " << cmd.toStdString() << endl;


    ffmpeg_process.setProcessChannelMode(QProcess::MergedChannels);
    ffmpeg_process.start(cmd);
    if (!ffmpeg_process.waitForStarted())
    {
        cout << "ffmpeg_run failed to start" << endl;
        return;
    }


    while (!ffmpeg_process.waitForFinished())
    {
    //    QString ffmpeg_info = ffmpeg_process.readAll();
    //    cout << "ffmpeg_info: " << ffmpeg_info.toStdString() << endl;
    //    ui->lb_info->setText(ffmpeg_info);
    //    _sleep(1);
    }

    QMessageBox::information(this, "提示", "转换完成！");
    // QString ffmpeg_info = ffmpeg_process.readAllStandardOutput();
    // if (ffmpeg_info.isEmpty())
    // {
    //     cout << "No output from ffmpeg" << endl;
    // }
    // else
    // {
    //     ui->lb_info->setText(ffmpeg_info);
    //     cout << "ffmpeg_info: " << ffmpeg_info.toStdString() << endl;
    // }
}
MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::en_mdf_res_state_change(int state)
{
    cout << "en_mdf_res_state_change" << endl;
    if (state == Qt::Checked)
    {
        this->ui->hor_val->setFocusPolicy(Qt::StrongFocus);
        this->ui->hor_val->setEnabled(true);
        this->ui->hor_val->setStyleSheet("background-color: white;");
        this->ui->ver_val->setFocusPolicy(Qt::StrongFocus);
        this->ui->ver_val->setEnabled(true);
        this->ui->ver_val->setStyleSheet("background-color: white;");
    }
    else
    {
        this->ui->hor_val->setFocusPolicy(Qt::NoFocus);
        this->ui->hor_val->setEnabled(false);
        this->ui->hor_val->setText("");
        this->ui->hor_val->setStyleSheet("background-color: gray;");
        this->ui->ver_val->setFocusPolicy(Qt::NoFocus);
        this->ui->ver_val->setEnabled(false);
        this->ui->ver_val->setText("");
        this->ui->ver_val->setStyleSheet("background-color: gray;");
    }
}

void MainWindow::press_bt_browse()
{
    QString select_file = QFileDialog::getOpenFileName(this, tr("选择一个目录"), tr("*.*"));

    if (!select_file.isEmpty())
    {
        // 用户选择了一个目录，处理选择的路径
        // 这里可以是输出到控制台或其他操作
        ui->le_src_file->setText(select_file);
        QFileInfo file_info(select_file);
        QString baseName = file_info.completeBaseName(); // 获取不带扩展名的文件名
        ui->le_dest_file->setText(file_info.path()+tr("/")+baseName);
    }
}