diff --git a/LFLiveKit/coder/LFHardwareVideoEncoder.m b/LFLiveKit/coder/LFHardwareVideoEncoder.m
index 6c3d20fe..3d98837f 100755
--- a/LFLiveKit/coder/LFHardwareVideoEncoder.m
+++ b/LFLiveKit/coder/LFHardwareVideoEncoder.m
@@ -66,7 +66,10 @@ - (void)resetCompressionSession {
     VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_DataRateLimits, (__bridge CFArrayRef)limit);
     VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_RealTime, kCFBooleanTrue);
     VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_ProfileLevel, kVTProfileLevel_H264_Main_AutoLevel);
-    VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_AllowFrameReordering, kCFBooleanTrue);
+    if([[UIDevice currentDevice].systemVersion floatValue] >= 15.4f)
+                         { VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_AllowFrameReordering, kCFBooleanFalse); } 
+                         else { VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_AllowFrameReordering, kCFBooleanTrue); }, 
+                         kCFBooleanTrue);
     VTSessionSetProperty(compressionSession, kVTCompressionPropertyKey_H264EntropyMode, kVTH264EntropyMode_CABAC);
     VTCompressionSessionPrepareToEncodeFrames(compressionSession);