diff --git a/src/streamlink/stream/ffmpegmux.py b/src/streamlink/stream/ffmpegmux.py
index 136c0b81..2dd00a20 100644
--- a/src/streamlink/stream/ffmpegmux.py
+++ b/src/streamlink/stream/ffmpegmux.py
@@ -83,7 +83,7 @@ class MuxedStream(Stream, Generic[TSubstreams]):
 
 
 class FFMPEGMuxer(StreamIO):
-    __commands__: ClassVar[list[str]] = ["ffmpeg"]
+    __commands__: ClassVar[list[str]] = ["@ffmpeg@"]
 
     DEFAULT_LOGLEVEL = "info"
     DEFAULT_OUTPUT_FORMAT = "matroska"