diff --git a/facefusion/core.py b/facefusion/core.py
index a5aedf76..4f4bc0cb 100755
--- a/facefusion/core.py
+++ b/facefusion/core.py
@@ -288,7 +288,7 @@ def process_video(start_time : float) -> None:
 		return
 	# merge video
 	logger.info(wording.get('merging_video_fps').format(video_fps = facefusion.globals.output_video_fps), __name__.upper())
-	if not merge_video(facefusion.globals.target_path, facefusion.globals.output_video_fps):
+	if not merge_video(facefusion.globals.target_path, facefusion.globals.output_video_resolution, facefusion.globals.output_video_fps):
 		logger.error(wording.get('merging_video_failed'), __name__.upper())
 		return
 	# handle audio
diff --git a/facefusion/ffmpeg.py b/facefusion/ffmpeg.py
index aee3239d..e585f9cd 100644
--- a/facefusion/ffmpeg.py
+++ b/facefusion/ffmpeg.py
@@ -48,10 +48,10 @@ def compress_image(output_path : str) -> bool:
 	return run_ffmpeg(commands)
 
 
-def merge_video(target_path : str, video_fps : Fps) -> bool:
+def merge_video(target_path : str, video_resolution : str, video_fps : Fps) -> bool:
 	temp_output_video_path = get_temp_output_video_path(target_path)
 	temp_frames_pattern = get_temp_frames_pattern(target_path, '%04d')
-	commands = [ '-hwaccel', 'auto', '-r', str(video_fps), '-i', temp_frames_pattern, '-c:v', facefusion.globals.output_video_encoder ]
+	commands = [ '-hwaccel', 'auto', '-i', temp_frames_pattern, '-s', str(video_resolution), '-r', str(video_fps), '-c:v', facefusion.globals.output_video_encoder ]
 	if facefusion.globals.output_video_encoder in [ 'libx264', 'libx265' ]:
 		output_video_compression = round(51 - (facefusion.globals.output_video_quality * 0.51))
 		commands.extend([ '-crf', str(output_video_compression), '-preset', facefusion.globals.output_video_preset ])