fix(format/stream): adjust for removed stream codec, removed in 5.0

src/format/stream/stream.rs

@@ -31,6 +31,7 @@ impl<'a> Stream<'a> {
 		unsafe { (*self.as_ptr()).id }
 	}
 
+	#[cfg(not(feature = "ffmpeg_5_0"))]
 	pub fn codec(&self) -> codec::Context {
 		unsafe { codec::Context::wrap((*self.as_ptr()).codec, Some(self.context.destructor())) }
 	}