Quote Originally Posted by ChristianEhrlicher View Post
Can you please show us your code?
Yes, of course.

mainwindow.h
Qt Code: 
  1. #ifndef MAINWINDOW_H
  2. #define MAINWINDOW_H
  3.  
  4. #include <QWidget>
  5. #include <QProcess>
  6. #include <QString>
  7. #include <QLabel>
  8.  
  9. class mainWindow : public QWidget
  10. {
  11.     Q_OBJECT
  12.  
  13.  public:
  14.     mainWindow(QWidget *parent = nullptr);
  15.     ~mainWindow();
  16.     void createUI();
  17.     void process();
  18.     QProcess *process1 = new QProcess(this);
  19.     QString processStdout;
  20.     QLabel *label;
  21.  
  22. private slots:
  23.     void ReadOutput(int, QProcess::ExitStatus);
  24.  
  25. };
  26. #endif // MAINWINDOW_H
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mainwindow.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2. #include <QPushButton>
  3. #include <QtDebug>
  4. #include <QTextCodec>
  5.  
  6. mainWindow::mainWindow(QWidget *parent) : QWidget(parent)
  7. {
  8.     createUI();
  9.     connect(process1, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(ReadOutput(int, QProcess::ExitStatus)));
  10. }
  11.  
  12. mainWindow::~mainWindow()
  13. {
  14.  
  15. }
  16. void mainWindow::createUI(){
  17.      label = new QLabel(this);
  18.      label->setGeometry(100, 200, 100, 30);
  19.  
  20.      QPushButton *buttonsearch = new QPushButton("Start process", this);
  21.      buttonsearch->setToolTip("Start process");
  22.      buttonsearch->setGeometry(200, 290, 100, 30);
  23.      connect(buttonsearch, &QPushButton::clicked, [this]() {process(); });
  24. }
  25.  
  26. void mainWindow::process(){
  27.     process1->setProcessChannelMode(QProcess::MergedChannels);
  28.     process1->start("\"D:\\YTDownloader\\youtube-dl.exe\" -e --no-playlist https://www.youtube.com/watch?v=6V-wwfuxZxw");
  29. }
  30.  
  31. void mainWindow::ReadOutput(int exitCode, QProcess::ExitStatus exitStatus){
  32.     qDebug() << exitCode;
  33.     qDebug() << exitStatus;
  34.     QByteArray a = process1->readAllStandardOutput();
  35.     qDebug() << a; 
  36.     QTextCodec* utfCodec = QTextCodec::codecForName("UTF-8");
  37.     processStdout = utfCodec->toUnicode(a);
  38.     qDebug() << processStdout;
  39.     label->setText(processStdout);
  40. }
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main.cpp
Qt Code: 
  1. #include <QApplication>
  2. #include "mainwindow.h"
  3.  
  4. int main(int argl,char *argv[])
  5. {
  6.     QApplication app(argl,argv);
  7.  
  8.     mainWindow *window = new mainWindow();
  9.     window->setWindowTitle("Test");
  10.     window->setFixedSize(700, 335);
  11.     window->show();
  12.  
  13.     return app.exec();
  14. }
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