Inicial, descargar y conversion basicas

utils/converter.py

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+import os
+import subprocess
+import re
+from PyQt6.QtCore import QThread, pyqtSignal
+
+class MediaConverter(QThread):
+    progress_signal = pyqtSignal(str)       # Mensaje de estado
+    finished_signal = pyqtSignal(bool, str) # (Éxito?, Mensaje final)
+
+    def __init__(self, input_file, output_file, preset_key, bin_dir="bin"):
+        super().__init__()
+        self.input_file = input_file
+        self.output_file = output_file
+        self.preset_key = preset_key
+        self.bin_dir = os.path.abspath(bin_dir)
+
+    def run(self):
+        ffmpeg_exe = os.path.join(self.bin_dir, "ffmpeg.exe")
+
+        if not os.path.exists(ffmpeg_exe):
+            self.finished_signal.emit(False, "No se encontró ffmpeg.exe en la carpeta bin.")
+            return
+
+        if not os.path.exists(self.input_file):
+            self.finished_signal.emit(False, "El archivo de entrada no existe.")
+            return
+
+        # Configuración de argumentos según el preset
+        if self.preset_key == "mp4_std":
+            # MP4 Estándar sin reescalado
+            codec_args = ["-c:v", "libx264", "-c:a", "aac"]
+
+        elif self.preset_key == "mp4_1080p":
+            # MP4 Max 1080p Verticales (mantiene aspecto, no escala si es <= 1080)
+            codec_args = ["-vf", "scale=-2:'min(1080,ih)'", "-c:v", "libx264", "-c:a", "aac"]
+            
+        elif self.preset_key == "mp3_192k":
+            # Estéreo completo a MP3 192 kbps
+            codec_args = ["-vn", "-c:a", "libmp3lame", "-b:a", "192k"]
+            
+        elif self.preset_key == "mp3_ch1":
+            # Solo Canal 1 (Izquierdo / Left) -> Mono MP3 192 kbps
+            codec_args = ["-vn", "-af", "pan=mono|c0=c0", "-c:a", "libmp3lame", "-b:a", "192k"]
+            
+        elif self.preset_key == "mp3_ch2":
+            # Solo Canal 2 (Derecho / Right) -> Mono MP3 192 kbps
+            codec_args = ["-vn", "-af", "pan=mono|c0=c1", "-c:a", "libmp3lame", "-b:a", "192k"]
+            
+        else:
+            self.finished_signal.emit(False, "Preset no reconocido.")
+            return
+
+        # Sobrescribir archivo de salida si ya existe (-y)
+        command = [ffmpeg_exe, "-y", "-i", self.input_file] + codec_args + [self.output_file]
+
+        try:
+            startupinfo = None
+            if os.name == 'nt':
+                startupinfo = subprocess.STARTUPINFO()
+                startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+
+            process = subprocess.Popen(
+                command,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.STDOUT,
+                text=True,
+                startupinfo=startupinfo,
+                encoding='utf-8',
+                errors='replace'
+            )
+
+            for line in process.stdout:
+                line_str = line.strip()
+                if line_str:
+                    if "time=" in line_str:
+                        match = re.search(r'time=(\d{2}:\d{2}:\d{2}\.\d{2})', line_str)
+                        if match:
+                            self.progress_signal.emit(f"Procesando... Tiempo: {match.group(1)}")
+
+            process.wait()
+
+            if process.returncode == 0:
+                self.finished_signal.emit(True, "¡Conversión completada con éxito!")
+            else:
+                self.finished_signal.emit(False, "Ocurrió un error durante la conversión con FFmpeg.")
+
+        except Exception as e:
+            self.finished_signal.emit(False, f"Error de ejecución: {str(e)}")