diff --git a/src/videosource.cpp b/src/videosource.cpp
index a8174dc..744b769 100644
--- a/src/videosource.cpp
+++ b/src/videosource.cpp
@@ -1541,7 +1541,6 @@ bool BestVideoSource::WriteVideoTrackIndex(bool AbsolutePath, const std::filesys
     WriteBSHeader(F, true);
     WriteInt64(F, FileSize);
     WriteInt(F, VideoTrack);
-    WriteInt(F, VariableFormat);
     WriteString(F, HWDevice);
     WriteInt(F, ExtraHWFrames);
 
@@ -1624,8 +1623,6 @@ bool BestVideoSource::ReadVideoTrackIndex(bool AbsolutePath, const std::filesyst
         return false;
     if (!ReadCompareInt(F, VideoTrack))
         return false;
-    if (!ReadCompareInt(F, VariableFormat))
-        return false;
     if (!ReadCompareString(F, HWDevice))
         return false;
     if (!ReadCompareInt(F, ExtraHWFrames))
diff --git a/src/videosource.h b/src/videosource.h
index 441ae9e..6dec657 100644
--- a/src/videosource.h
+++ b/src/videosource.h
@@ -272,7 +272,7 @@ class BestVideoSource {
     std::string HWDevice;
     int ExtraHWFrames;
     int VideoTrack;
-    int VariableFormat;
+    int VariableFormat = -1;
     int Threads;
     bool LinearMode = false;
     uint64_t DecoderSequenceNum = 0;