Updated "frame_count" messuare for faster calculation

anime_audio_helper.py

@@ -161,7 +161,7 @@ def convert_video(source_file_base, source_file_full, is_vfr, target_cfr_fps_for
 
     # --- SVT-AV1 ENCODING (ffmpeg pipe to SvtAv1EncApp) ---
     print("    - Starting AV1 encode with ffmpeg -> SvtAv1EncApp pipe (this will take a long time)...")
-    # Probe UTVideo file for width, height, and frame count
+    # Probe UTVideo file for width, height (ffprobe) and frame count (mediainfo, fallback to ffprobe)
     ffprobe_dim_cmd = [
         "ffprobe", "-v", "error", "-select_streams", "v:0",
         "-show_entries", "stream=width,height", "-of", "json", ut_video_full_path
@@ -171,6 +171,19 @@ def convert_video(source_file_base, source_file_full, is_vfr, target_cfr_fps_for
     width = ffprobe_dim['streams'][0]['width']
     height = ffprobe_dim['streams'][0]['height']
 
+    # Try to get frame count from mediainfo (faster)
+    mediainfo_json = run_cmd([
+        "mediainfo", "--Output=JSON", "-f", ut_video_full_path
+    ], capture_output=True)
+    media_info = json.loads(mediainfo_json)
+    frame_count = None
+    for track in media_info.get("media", {}).get("track", []):
+        if track.get("@type") == "Video":
+            frame_count = int(track.get("FrameCount", 0))
+            break
+
+    # Fallback to ffprobe if mediainfo fails
+    if not frame_count:
         ffprobe_framecount_cmd = [
             "ffprobe", "-v", "error", "-select_streams", "v:0",
             "-count_frames", "-show_entries", "stream=nb_read_frames",