修改

entity/ffmpeg.py

@@ -213,6 +213,12 @@ class FfmpegTask(object):
                 output_args.append(f"-map")
                 output_args.append(audio_output_str)
             return args + input_args + ["-filter_complex", ";".join(filter_args)] +  output_args + [self.get_output_file()]
+        elif self.task_type == 'copy':
+            if len(self.input_file) == 1:
+                if type(self.input_file[0]) is str:
+                    if self.input_file[0] == self.get_output_file():
+                        return None
+            return args + ["-i", self.input_file[0]] + ["-c", "copy", self.get_output_file()]
 
     def set_output_file(self, file=None):
         if file is None: