lime_qt: Added -d option for dumping video

src/lime_qt/main.cpp

@@ -296,6 +296,21 @@ GMainWindow::GMainWindow(Core::System& system_)
             break;
         }
 
+        // Dump video
+        if (args[i] == QStringLiteral("-d")) {
+            if (i >= args.size() - 1 || args[i + 1].startsWith(QChar::fromLatin1('-'))) {
+                continue;
+            }
+            if (!DynamicLibrary::FFmpeg::LoadFFmpeg()) {
+                ShowFFmpegErrorMessage();
+                continue;
+            }
+            video_dumping_path = args[++i];
+            video_dumping_on_start = true;
+            ui->action_Dump_Video->setChecked(true);
+            continue;
+        }
+
         // Launch game in fullscreen mode
         if (args[i] == QStringLiteral("-f")) {
             ui->action_Fullscreen->setChecked(true);
@@ -2797,16 +2812,7 @@ void GMainWindow::OnCaptureScreenshot() {
     OnStartGame();
 }
 
-void GMainWindow::OnDumpVideo() {
+void GMainWindow::ShowFFmpegErrorMessage() {
-    if (DynamicLibrary::FFmpeg::LoadFFmpeg()) {
-        if (ui->action_Dump_Video->isChecked()) {
-            OnStartVideoDumping();
-        } else {
-            OnStopVideoDumping();
-        }
-    } else {
-        ui->action_Dump_Video->setChecked(false);
-
     QMessageBox message_box;
     message_box.setWindowTitle(tr("Could not load video dumper"));
     message_box.setText(
@@ -2830,6 +2836,18 @@ void GMainWindow::OnDumpVideo() {
         OnOpenFFmpeg();
 #endif
     }
+}
+
+void GMainWindow::OnDumpVideo() {
+    if (DynamicLibrary::FFmpeg::LoadFFmpeg()) {
+        if (ui->action_Dump_Video->isChecked()) {
+            OnStartVideoDumping();
+        } else {
+            OnStopVideoDumping();
+        }
+    } else {
+        ui->action_Dump_Video->setChecked(false);
+        ShowFFmpegErrorMessage();
     }
 }
 
@@ -2914,7 +2932,8 @@ void GMainWindow::StartVideoDumping(const QString& path) {
     } else {
         QMessageBox::critical(
             this, tr("Lime3DS"),
-            tr("Could not start video dumping.<br>Refer to the log for details."));
+            tr("Could not start video dumping.<br>Please ensure that the video encoder is "
+               "configured correctly.<br>Refer to the log for details."));
         ui->action_Dump_Video->setChecked(false);
     }
 }
@@ -3629,6 +3648,7 @@ static Qt::HighDpiScaleFactorRoundingPolicy GetHighDpiRoundingPolicy() {
 static void PrintHelp(const char* argv0) {
     std::cout << "Usage: " << argv0
               << " [options] <filename>\n"
+                 "-d [path]    Dump video recording of emulator playback to the given file path\n"
                  "-f           Start in fullscreen mode\n"
                  "-g [path]    Start a game file located at the given path\n"
                  "-h           Display this help and exit\n"
@@ -3644,7 +3664,7 @@ static void PrintVersion() {
 
 int main(int argc, char* argv[]) {
     while (optind < argc) {
-        int arg = getopt(argc, argv, "fg:hi:r:v");
+        int arg = getopt(argc, argv, "d:fg:hi:p:r:v");
         if (arg != -1) {
             switch (static_cast<char>(arg)) {
             case 'h':

src/lime_qt/main.h

@@ -222,6 +222,8 @@ private:
                             const std::string& keywords, const std::string& name,
                             const bool& skip_tryexec);
 
+    void ShowFFmpegErrorMessage();
+
 private slots:
     void OnStartGame();
     void OnRestartGame();