diff --git a/src/N_m3u8DL-RE.Parser/Extractor/IExtractor.cs b/src/N_m3u8DL-RE.Parser/Extractor/IExtractor.cs
index 25c0c5f..e44bbf7 100644
--- a/src/N_m3u8DL-RE.Parser/Extractor/IExtractor.cs
+++ b/src/N_m3u8DL-RE.Parser/Extractor/IExtractor.cs
@@ -9,7 +9,7 @@ using N_m3u8DL_RE.Common.Enum;
 
 namespace N_m3u8DL_RE.Parser.Extractor
 {
-    internal interface IExtractor
+    public interface IExtractor
     {
         ExtractorType ExtractorType { get; }
 
diff --git a/src/N_m3u8DL-RE.Parser/StreamExtractor.cs b/src/N_m3u8DL-RE.Parser/StreamExtractor.cs
index dfc333d..f8f4c76 100644
--- a/src/N_m3u8DL-RE.Parser/StreamExtractor.cs
+++ b/src/N_m3u8DL-RE.Parser/StreamExtractor.cs
@@ -10,7 +10,7 @@ namespace N_m3u8DL_RE.Parser
 {
     public class StreamExtractor
     {
-        private IExtractor extractor;
+        public IExtractor Extractor { get; private set; }
         private ParserConfig parserConfig = new ParserConfig();
         private string rawText;
         private static SemaphoreSlim semaphore = new SemaphoreSlim(1, 1);
@@ -56,13 +56,13 @@ namespace N_m3u8DL_RE.Parser
             if (rawText.StartsWith(HLSTags.ext_m3u))
             {
                 Logger.InfoMarkUp(ResString.matchHLS);
-                extractor = new HLSExtractor(parserConfig);
+                Extractor = new HLSExtractor(parserConfig);
             }
             else if (rawText.Contains("</MPD>") && rawText.Contains("<MPD"))
             {
                 Logger.InfoMarkUp(ResString.matchDASH);
                 //extractor = new DASHExtractor(parserConfig);
-                extractor = new DASHExtractor2(parserConfig);
+                Extractor = new DASHExtractor2(parserConfig);
             }
             else
             {
@@ -80,7 +80,7 @@ namespace N_m3u8DL_RE.Parser
             {
                 await semaphore.WaitAsync();
                 Logger.Info(ResString.parsingStream);
-                return await extractor.ExtractStreamsAsync(rawText);
+                return await Extractor.ExtractStreamsAsync(rawText);
             }
             finally
             {
@@ -98,7 +98,7 @@ namespace N_m3u8DL_RE.Parser
             {
                 await semaphore.WaitAsync();
                 Logger.Info(ResString.parsingStream);
-                await extractor.FetchPlayListAsync(streamSpecs);
+                await Extractor.FetchPlayListAsync(streamSpecs);
             }
             finally
             {
diff --git a/src/N_m3u8DL-RE/Program.cs b/src/N_m3u8DL-RE/Program.cs
index 58bbe64..c1db9c0 100644
--- a/src/N_m3u8DL-RE/Program.cs
+++ b/src/N_m3u8DL-RE/Program.cs
@@ -246,8 +246,9 @@ namespace N_m3u8DL_RE
                 if (!selectedStreams.Any())
                     throw new Exception(ResString.noStreamsToDownload);
 
-                //选中流中若有没加载出playlist的，加载playlist
-                if (selectedStreams.Any(s => s.Playlist == null))
+                //HLS: 选中流中若有没加载出playlist的，加载playlist
+                //DASH: 加载playlist (调用url预处理器)
+                if (selectedStreams.Any(s => s.Playlist == null) || extractor.Extractor.ExtractorType == ExtractorType.MPEG_DASH)
                     await extractor.FetchPlayListAsync(selectedStreams);
 
                 //无法识别的加密方式，自动开启二进制合并