Add auto configuration option for example

examples/stdin.rs

@@ -13,8 +13,8 @@ struct Args {
     #[clap(long)]
     height: u32,
 
-    #[clap(long, default_value = "8")]
-    skip: u32,
+    #[clap(long)]
+    skip: Option<u32>,
 }
 
 // Example usage:
@@ -28,11 +28,16 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         height,
         skip,
     } = Args::parse();
-    let mut encoder = Encoder::new(
-        Components { x: 4, y: 3 },
-        ImageBounds { width, height },
-        skip,
-    )?;
+
+    let mut encoder = if let Some(skip) = skip {
+        Encoder::new(
+            Components { x: 4, y: 3 },
+            ImageBounds { width, height },
+            skip,
+        )?
+    } else {
+        Encoder::auto(ImageBounds { width, height })
+    };
 
     let mut stdin = std::io::stdin().lock();
     let mut buf = [0u8; 1024];