diff --git a/Sources/PlayerBridge.swift b/Sources/PlayerBridge.swift
index 1c2805c..09df647 100644
--- a/Sources/PlayerBridge.swift
+++ b/Sources/PlayerBridge.swift
@@ -255,6 +255,9 @@ final class PlayerBridge: ObservableObject {
         }
     }
     
+    // 播放器报错的诊断消息（存在这里，和错误一起显示）
+    private var lastDiagMsg = ""
+    
     func playIndex(_ index: Int) {
         guard index >= 0 && index < queue.count else { return }
         
@@ -280,6 +283,7 @@ final class PlayerBridge: ObservableObject {
                 try? fh.close()
             }
             diagLog("Local file check: exists=\(exists) readable=\(readable) size=\(fileSize) magic=\(String(format:"%08X", magic))")
+            lastDiagMsg = "file: exists=\(exists) readable=\(readable)\nsize=\(fileSize) magic=\(String(format:"%08X", magic))"
         }
         
         // 先清除旧的 KVO，避免野指针
@@ -358,7 +362,7 @@ final class PlayerBridge: ObservableObject {
                     let errMsg = err?.localizedDescription ?? "Unknown error"
                     let errCode = (err as NSError?)?.code ?? 0
                     let errDomain = (err as NSError?)?.domain ?? "none"
-                    let fullMsg = "\(errMsg)\n[code:\(errCode) domain:\(errDomain)]\n\(item.url.lastPathComponent)"
+                    let fullMsg = "\(errMsg)\n[code:\(errCode) domain:\(errDomain)]\n\(self?.lastDiagMsg ?? "")\n\(item.url.lastPathComponent)"
                     self?.diagLog("AVPlayerItem FAILED: \(errMsg) code=\(errCode) domain=\(errDomain)")
                     self?.playerStatus = .error(fullMsg)
                     self?.loadingTimer?.invalidate()