update

etl-core/src/main/java/com/tzld/crawler/etl/util/FileUtils.java

@@ -219,7 +219,7 @@ public class FileUtils {
                 "-y",
                 "-i", fileUrl,
                 "-c", "copy",
-                filePath
+                filePath+".mp4"
         );
         processBuilder.redirectErrorStream(false);
         Process process = processBuilder.start();