diff --git a/anime_audio_helper.py b/anime_audio_helper.py
index c2750bc..39394c5 100644
--- a/anime_audio_helper.py
+++ b/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 and height
+    # Probe UTVideo file for width, height, and frame count
     ffprobe_dim_cmd = [
         "ffprobe", "-v", "error", "-select_streams", "v:0",
         "-show_entries", "stream=width,height", "-of", "json", ut_video_full_path
@@ -171,10 +171,20 @@ 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']
 
+    ffprobe_framecount_cmd = [
+        "ffprobe", "-v", "error", "-select_streams", "v:0",
+        "-count_frames", "-show_entries", "stream=nb_read_frames",
+        "-of", "json", ut_video_full_path
+    ]
+    ffprobe_framecount_json = run_cmd(ffprobe_framecount_cmd, capture_output=True)
+    ffprobe_framecount = json.loads(ffprobe_framecount_json)
+    frame_count = int(ffprobe_framecount['streams'][0].get('nb_read_frames', 0))
+
     svtav1_param_list = [
         "--input-depth", "10",
         "--width", str(width),
-        "--height", str(height)
+        "--height", str(height),
+        "--frames", str(frame_count)
     ]
     for k, v in SVT_AV1_PARAMS.items():
         if isinstance(v, bool):