diff --git a/src/tracklist.cpp b/src/tracklist.cpp
index 9dfbfab..454186b 100644
--- a/src/tracklist.cpp
+++ b/src/tracklist.cpp
@@ -64,6 +64,9 @@ void BestTrackList::OpenFile(const std::filesystem::path &SourceFile, const std:
 
         TrackList.push_back(TI);
     }
+
+    File.ContainerStartTime = FormatContext->start_time;
+    File.ContainerStartTimeBase = AV_TIME_BASE;
 }
 
 BestTrackList::BestTrackList(const std::filesystem::path &SourceFile, const std::map<std::string, std::string> *LAVFOpts) {
@@ -120,3 +123,7 @@ std::map<std::string, std::string> BestTrackList::GetTrackMetadata(int Track) co
 
     return Result;
 }
+
+const BestTrackList::FileInfo &BestTrackList::GetFileInfo() const {
+    return File;
+}
diff --git a/src/tracklist.h b/src/tracklist.h
index 795e50b..9ba4a30 100644
--- a/src/tracklist.h
+++ b/src/tracklist.h
@@ -38,10 +38,16 @@ struct BestTrackList {
         int Disposition;
         std::string DispositionString;
     };
+    struct FileInfo {
+        // Warning, ContainerStartTime may be equal to AV_NOPTS_VALUE.
+        int64_t ContainerStartTime;
+        int ContainerStartTimeBase;
+    };
 private:
     AVFormatContext *FormatContext = nullptr;
 
     std::vector<TrackInfo> TrackList;
+    FileInfo File;
 
     void OpenFile(const std::filesystem::path &SourceFile, const std::map<std::string, std::string> &LAVFOpts);
     void Free();
@@ -52,6 +58,7 @@ struct BestTrackList {
     [[nodiscard]] const TrackInfo &GetTrackInfo(int Track) const;
     [[nodiscard]] std::map<std::string, std::string> GetFileMetadata() const;
     [[nodiscard]] std::map<std::string, std::string> GetTrackMetadata(int Track) const;
+    [[nodiscard]] const FileInfo &GetFileInfo() const;
 };
 
 #endif