Add error.rs

src/error.rs

@@ -0,0 +1,21 @@
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum ProbeError {
+    #[error("Video file not found: {0}")]
+    FileNotFound(String),
+    
+    #[error("Failed to execute ffprobe: {0}")]
+    FfprobeExecution(#[from] std::io::Error),
+    
+    #[error("Failed to parse ffprobe output: {0}")]
+    ParseError(#[from] serde_json::Error),
+    
+    #[error("ffprobe returned non-zero exit code: {0}")]
+    FfprobeFailed(String),
+    
+    #[error("No video stream found")]
+    NoVideoStream,
+}
+
+pub type Result<T> = std::result::Result<T, ProbeError>;