diff --git a/workflow/video.py b/workflow/video.py
index cbb88f1..4aea26e 100644
--- a/workflow/video.py
+++ b/workflow/video.py
@@ -112,7 +112,7 @@ def get_encode_hevc_process_use_nvenc(orig_filename: str, subtitles: list[str],
     encode_process = subprocess.Popen([
         FFMPEG_EXEC, *_common_ffmpeg_setting(),
         "-i", orig_filename, "-vf",
-        "".join("subtitles=%s," % i for i in subtitles) + ",hwupload_cuda",
+        "".join("subtitles=%s," % i for i in subtitles) + "hwupload_cuda",
         "-c:v", "hevc_nvenc",
         *_common_ffmpeg_params(),
         # "-t", "10",