Update intro.py

intro.py

@@ -7,15 +7,28 @@ def prepend_intro(
     main_video,
     output_video
 ):
+    """
+    Intro boleh:
+    - tanpa audio
+    - dengan audio
+    - codec apa saja
+    - resolusi apa saja
+
+    Akan dinormalisasi dulu lalu digabung
+    dengan video Quran utama.
+    """
 
     if not intro_video:
         return main_video
 
-    normalized_intro = os.path.abspath(
-    "temp/intro_normalized.mp4"
-    )
+    os.makedirs("temp", exist_ok=True)
+
+    normalized_intro = "temp/intro_normalized.mp4"
+
+    print("=" * 60)
+    print("NORMALIZING INTRO")
+    print("=" * 60)
 
-    # NORMALIZE INTRO
     subprocess.run(
         [
             "ffmpeg",
@@ -24,9 +37,21 @@ def prepend_intro(
             "-i",
             intro_video,
 
+            # tambahkan audio silent
+            "-f",
+            "lavfi",
+
+            "-i",
+            "anullsrc=r=48000:cl=stereo",
+
+            "-shortest",
+
             "-vf",
-            "scale=1920:1080:force_original_aspect_ratio=decrease,"
-            "pad=1920:1080:(ow-iw)/2:(oh-ih)/2",
+            (
+                "scale=1920:1080:"
+                "force_original_aspect_ratio=decrease,"
+                "pad=1920:1080:(ow-iw)/2:(oh-ih)/2"
+            ),
 
             "-r",
             "30",
@@ -43,6 +68,12 @@ def prepend_intro(
             "-c:a",
             "aac",
 
+            "-ar",
+            "48000",
+
+            "-ac",
+            "2",
+
             "-b:a",
             "192k",
 
@@ -51,38 +82,52 @@ def prepend_intro(
         check=True
     )
 
-    list_file = "temp/concat.txt"
-
-    with open(list_file, "w") as f:
-
-        f.write(
-            f"file '{os.path.abspath(normalized_intro)}'\n"
-        )
-
-        f.write(
-            f"file '{os.path.abspath(main_video)}'\n"
-        )
+    print("=" * 60)
+    print("CONCAT INTRO + MAIN")
+    print("=" * 60)
 
     subprocess.run(
         [
             "ffmpeg",
             "-y",
 
-            "-f",
-            "concat",
-
-            "-safe",
-            "0",
+            "-i",
+            normalized_intro,
 
             "-i",
-            list_file,
+            main_video,
+
+            "-filter_complex",
+            "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]",
 
-            "-c",
-            "copy",
+            "-map",
+            "[v]",
+
+            "-map",
+            "[a]",
+
+            "-c:v",
+            "libx264",
+
+            "-preset",
+            "veryfast",
+
+            "-crf",
+            "22",
+
+            "-c:a",
+            "aac",
+
+            "-b:a",
+            "192k",
 
             output_video
         ],
         check=True
     )
 
+    print("=" * 60)
+    print("INTRO CONCAT SUCCESS")
+    print("=" * 60)
+
     return output_video