diff --git a/src/main/java/com/ycwl/basic/task/VideoPieceGetter.java b/src/main/java/com/ycwl/basic/task/VideoPieceGetter.java
index 09448641..2fd4da1a 100644
--- a/src/main/java/com/ycwl/basic/task/VideoPieceGetter.java
+++ b/src/main/java/com/ycwl/basic/task/VideoPieceGetter.java
@@ -299,7 +299,9 @@ public class VideoPieceGetter {
                 ffmpegTask.setFileList(listByDtRange);
                 ffmpegTask.setDuration(duration);
                 ffmpegTask.setOffsetStart(BigDecimal.valueOf(offset, 3));
-                File outFile = new File(deviceId.toString() + "_" + faceSampleId + ".mp4");
+                // 使用时间戳和线程ID确保输出文件名唯一性，避免并发冲突
+                String uniqueSuffix = System.currentTimeMillis() + "_" + Thread.currentThread().getId();
+                File outFile = new File(deviceId.toString() + "_" + faceSampleId + "_" + uniqueSuffix + ".mp4");
                 ffmpegTask.setOutputFile(outFile.getAbsolutePath());
                 boolean result = startFfmpegTask(ffmpegTask);
                 if (!result) {
@@ -437,7 +439,9 @@ public class VideoPieceGetter {
         boolean notOk = task.getFileList().stream().map(file -> {
             try {
                 if (file.isNeedDownload() || (!file.getName().endsWith(".ts"))) {
-                    String tmpFile = file.getName() + ".ts";
+                    // 使用时间戳和线程ID确保临时文件名唯一性，避免并发冲突
+                    String uniqueSuffix = System.currentTimeMillis() + "_" + Thread.currentThread().getId();
+                    String tmpFile = file.getName() + "_" + uniqueSuffix + ".ts";
                     boolean result = convertMp4ToTs(file, tmpFile);
                     // 因为是并行转换，没法保证顺序，就直接存里面
                     if (result) {