Update src/capsule_builder.py

src/capsule_builder.py

@@ -225,3 +225,21 @@ def export_project_zip():
     except Exception as e:
         print(f"[Export] ❌ Erreur ZIP : {e}")
         return None
+
+def assemble_final_fast():
+    """Concaténation instantanée sans réencodage (FFmpeg direct)."""
+    import subprocess, os
+    if not capsules:
+        return None, "❌ Aucune capsule."
+    list_path = os.path.join(OUT_DIR, "concat_list.txt")
+    with open(list_path, "w", encoding="utf-8") as f:
+        for c in capsules:
+            f.write(f"file '{c['file']}'\n")
+    out_path = os.path.join(OUT_DIR, "VIDEO_COMPLETE_FAST.mp4")
+    cmd = [
+        "ffmpeg", "-f", "concat", "-safe", "0", "-i", list_path,
+        "-c", "copy", out_path
+    ]
+    subprocess.run(cmd, check=True)
+    return out_path, "🎉 Vidéo finale assemblée instantanément (sans réencodage)"
+