Add film grain parameter to video encoding with configurable amount

src/app.py

@@ -30,7 +30,8 @@ def main(
     nosubtitles: bool = typer.Option(False, "-ns", "--nosubtitles", help="Remove subtitles"),
     preset: int = typer.Option(2, "-p", "--preset", help="Encoding preset"),
     crf: int = typer.Option(30, "-c", "--crf", help="CRF value"),
-    original_media_type: str = typer.Option("DVD", "-o", "--original-media-type", help="Set the ORIGINAL_MEDIA_TYPE metadata")
+    original_media_type: str = typer.Option("DVD", "-o", "--original-media-type", help="Set the ORIGINAL_MEDIA_TYPE metadata"),
+    film_grain: int = typer.Option(20, "-fg", "--film-grain", help="Film grain amount (default: 20)")
 ):
     video_details = VideoFile(
         imdb=imdb, video_path=filename, allow_subtitle=not nosubtitles
@@ -53,6 +54,7 @@ def main(
         stream.preset = preset
         stream.crf = crf
         stream.original_media_type = original_media_type
+        stream.film_grain = film_grain
     export_data = " ".join(data.cmd())
     export_path = Path(filename).parent / "encode.sh"
     write_shell_script(export_data, export_path)

src/models/streams.py

@@ -28,6 +28,7 @@ class VideoStream(BaseModel):
     preset: int = Field(2)
     crf: int = Field(30)
     original_media_type: str = Field(None)
+    film_grain: int = Field(20)
 
     @cached_property
     def fps(self) -> float:
@@ -45,7 +46,7 @@ class VideoStream(BaseModel):
             "-preset",
             str(self.preset),
             "-svtav1-params",
-            "tune=0:film-grain=20:scd=1",
+            f"tune=0:film-grain={self.film_grain}:scd=1",
             "-vf",
             "'scale=iw*sar:ih,setsar=1,scale=-2:ih:lanczos'",
             "-g",