1.优化ffmpeg命令，适配各种类型视频

@@ -407,6 +407,7 @@ class AdminMakeImmerse implements ShouldQueue
                         foreach ($contents as $key => $content){
                             $DS = $key * $round;
                             $DE = $DS + $round;
+                            Log::debug("round:$round, DS:$DS, DE:$DE");
                             $text_file = $this->getAbsolutePath($this->getTempPath('.txt','text'));
                             file_put_contents($text_file, $content);
                             $sub_text .= 'drawtext="'.