fix: restaurada musica de bak6 con correccion de bucle

app.py

@@ -368,18 +368,16 @@ def montar_video(guion, archivos, subs=None, efecto="ninguno", material_escenas=
     if _os.path.exists("musica.mp3"):
         try:
             from moviepy.editor import CompositeAudioClip, AudioFileClip as _AC
-            musica = _AC("musica.mp3").volumex(0.22)
-            dur = getattr(clip, "duration", None) or voz.duration
-            if voz.duration and voz.duration > dur:
-                dur = voz.duration
+            musica = _AC("musica.mp3").volumex(0.18)
+            dur = voz.duration
             if musica.duration > dur:
                 musica = musica.subclip(0, dur)
             elif musica.duration < dur:
                 import math
                 reps = math.ceil(dur / musica.duration)
                 from moviepy.editor import concatenate_audioclips
-                musica = concatenate_audioclips([musica] * reps).subclip(0, dur)
-            audio_final = CompositeAudioClip([voz.volumex(1.0), musica]).set_duration(dur)
+                musica = concatenate_audioclips([_AC("musica.mp3").volumex(0.18) for _ in range(reps)]).subclip(0, dur)
+            audio_final = CompositeAudioClip([voz.volumex(1.0), musica])
         except Exception as _em:
             log(f"Error mezcla musica: {_em}")
             audio_final = voz