diff --git a/scripts/animatediff.py b/scripts/animatediff.py
index 5267421..439a011 100644
--- a/scripts/animatediff.py
+++ b/scripts/animatediff.py
@@ -127,6 +127,45 @@ def on_ui_settings():
             section=section
         )
     )
+    shared.opts.add_option(
+        key="animatediff_mp4_crf",
+        info=shared.OptionInfo(
+            default=23,
+            label="MP4 Quality (CRF)",
+            component=gr.Slider,
+            component_args={
+                "minimum": 0,
+                "maximum": 51,
+                "step": 1},
+            section=section
+        )
+        .link("docs", "https://trac.ffmpeg.org/wiki/Encode/H.264#crf")
+        .info("17 for best quality, up to 28 for smaller size")
+    )
+    shared.opts.add_option(
+        key="animatediff_mp4_preset",
+        info=shared.OptionInfo(
+            default="",
+            label="MP4 Encoding Preset",
+            component=gr.Dropdown,
+            component_args={"choices": ["", 'veryslow', 'slower', 'slow', 'medium', 'fast', 'faster', 'veryfast', 'superfast', 'ultrafast']},
+            section=section,
+        )
+        .link("docs", "https://trac.ffmpeg.org/wiki/Encode/H.264#Preset")
+        .info("encoding speed, use the slowest you can tolerate")
+    )
+    shared.opts.add_option(
+        key="animatediff_mp4_tune",
+        info=shared.OptionInfo(
+            default="",
+            label="MP4 Tune encoding for content type",
+            component=gr.Dropdown,
+            component_args={"choices": ["", "film", "animation", "grain"]},
+            section=section
+        )
+        .link("docs", "https://trac.ffmpeg.org/wiki/Encode/H.264#Tune")
+        .info("optimize for specific content types")
+    )
     shared.opts.add_option(
         "animatediff_webp_quality",
         shared.OptionInfo(
diff --git a/scripts/animatediff_output.py b/scripts/animatediff_output.py
index 061fc31..f759717 100644
--- a/scripts/animatediff_output.py
+++ b/scripts/animatediff_output.py
@@ -233,14 +233,31 @@ class AnimateDiffOutput:
             except ImportError:
                 from launch import run_pip
                 run_pip(
-                    "install imageio[pyav]",
-                    "sd-webui-animatediff MP4 save requirement: imageio[pyav]",
+                    "install pyav",
+                    "sd-webui-animatediff MP4 save requirement: PyAV",
                 )
-            with imageio.imopen(video_path_mp4, 'w', plugin='pyav') as file:
-                if use_infotext:
-                    file.container_metadata["Comment"] = infotext
-                logger.info(f"Saving {video_path_mp4}")
-                file.write(video_array, codec='h264', fps=params.fps)
+                import av
+            options = {
+                "crf": str(shared.opts.data.get("animatediff_mp4_crf", 23))
+            }
+            preset = shared.opts.data.get("animatediff_mp4_preset", "")
+            if preset != "": options["preset"] = preset
+            tune = shared.opts.data.get("animatediff_mp4_tune", "")
+            if tune != "": options["tune"] = tune
+            output = av.open(video_path_mp4, "w")
+            logger.info(f"Saving {video_path_mp4}")
+            if use_infotext:
+                output.metadata["Comment"] = infotext
+            stream = output.add_stream('libx264', params.fps, options=options)
+            stream.width = frame_list[0].width
+            stream.height = frame_list[0].height
+            for img in video_array:
+                frame = av.VideoFrame.from_ndarray(img)
+                packet = stream.encode(frame)
+                output.mux(packet)
+            packet = stream.encode(None)
+            output.mux(packet)
+            output.close()
 
         if "TXT" in params.format and res.images[index].info is not None:
             video_path_txt = str(video_path_prefix) + ".txt"