diff --git a/BBDown.Core/Parser.cs b/BBDown.Core/Parser.cs
index bb57bb3d3..97276e30e 100644
--- a/BBDown.Core/Parser.cs
+++ b/BBDown.Core/Parser.cs
@@ -113,7 +113,8 @@ private static async Task<string> GetPlayJsonAsync(string aid, string cid, strin
                                 dfn = Config.qualitys[videoId],
                                 bandwith = Convert.ToInt64(dashVideo.GetProperty("bandwidth").ToString()) / 1000,
                                 baseUrl = dashVideo.GetProperty("base_url").ToString(),
-                                codecs = GetVideoCodec(dashVideo.GetProperty("codecid").ToString())
+                                codecs = GetVideoCodec(dashVideo.GetProperty("codecid").ToString()),
+                                size = dashVideo.TryGetProperty("size", out var sizeNode) ? Convert.ToDouble(sizeNode.ToString()) : 0
                             };
                             if (!videoTracks.Contains(v)) videoTracks.Add(v);
                         }
@@ -217,7 +218,8 @@ private static async Task<string> GetPlayJsonAsync(string aid, string cid, strin
                             dfn = Config.qualitys[videoId],
                             bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
                             baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
-                            codecs = GetVideoCodec(node.GetProperty("codecid").ToString())
+                            codecs = GetVideoCodec(node.GetProperty("codecid").ToString()),
+                            size = node.TryGetProperty("size", out var sizeNode) ? Convert.ToDouble(sizeNode.ToString()) : 0
                         };
                         if (!tvApi && !appApi)
                         {
diff --git a/BBDown/Program.cs b/BBDown/Program.cs
index 3f3c30c79..07ee5196f 100644
--- a/BBDown/Program.cs
+++ b/BBDown/Program.cs
@@ -572,7 +572,8 @@ private static async Task DoWorkAsync(MyOption myOption)
                                     foreach (var v in videoTracks)
                                     {
                                         int pDur = p.dur == 0 ? v.dur : p.dur;
-                                        LogColor($"{index++}. [{v.dfn}] [{v.res}] [{v.codecs}] [{v.fps}] [{v.bandwith} kbps] [~{FormatFileSize(pDur * v.bandwith * 1024 / 8)}]".Replace("[] ", ""), false);
+                                        var size = v.size > 0 ? v.size : pDur * v.bandwith * 1024 / 8;
+                                        LogColor($"{index++}. [{v.dfn}] [{v.res}] [{v.codecs}] [{v.fps}] [{v.bandwith} kbps] [~{FormatFileSize(size)}]".Replace("[] ", ""), false);
                                         if (infoMode) Console.WriteLine(v.baseUrl);
                                     }
                                 }
@@ -612,7 +613,10 @@ private static async Task DoWorkAsync(MyOption myOption)
 
                             Log($"已选择的流:");
                             if (videoTracks.Count > 0)
-                                LogColor($"[视频] [{videoTracks[vIndex].dfn}] [{videoTracks[vIndex].res}] [{videoTracks[vIndex].codecs}] [{videoTracks[vIndex].fps}] [{videoTracks[vIndex].bandwith} kbps] [~{FormatFileSize(videoTracks[vIndex].dur * videoTracks[vIndex].bandwith * 1024 / 8)}]".Replace("[] ", ""), false);
+                            {
+                                var size = videoTracks[vIndex].size > 0 ? videoTracks[vIndex].size : videoTracks[vIndex].dur * videoTracks[vIndex].bandwith * 1024 / 8;
+                                LogColor($"[视频] [{videoTracks[vIndex].dfn}] [{videoTracks[vIndex].res}] [{videoTracks[vIndex].codecs}] [{videoTracks[vIndex].fps}] [{videoTracks[vIndex].bandwith} kbps] [~{FormatFileSize(size)}]".Replace("[] ", ""), false);
+                            }
                             if (audioTracks.Count > 0)
                                 LogColor($"[音频] [{audioTracks[aIndex].codecs}] [{audioTracks[aIndex].bandwith} kbps] [~{FormatFileSize(audioTracks[aIndex].dur * audioTracks[aIndex].bandwith * 1024 / 8)}]", false);