Add ffmpeg_path CLI option and pass to downloader

gamdl/cli/cli.py

@@ -176,6 +176,7 @@ async def main(config: CliConfig):
         output_path=config.output_path,
         temp_path=config.temp_path,
         nm3u8dlre_path=config.nm3u8dlre_path,
+        ffmpeg_path=config.ffmpeg_path,
         download_mode=config.download_mode,
         album_folder_template=config.album_folder_template,
         compilation_folder_template=config.compilation_folder_template,

gamdl/cli/cli_config.py

@@ -313,6 +313,14 @@ class CliConfig:
             default=base_downloader_sig.parameters["nm3u8dlre_path"].default,
         ),
     ]
+    ffmpeg_path: Annotated[
+        str,
+        option(
+            "--ffmpeg-path",
+            help="FFmpeg executable path",
+            default=base_downloader_sig.parameters["ffmpeg_path"].default,
+        ),
+    ]
     download_mode: Annotated[
         DownloadMode,
         option(