Something

Index: libs/libmythtv/avformatdecoder.cpp
===================================================================
--- libs/libmythtv/avformatdecoder.cpp	(revision 25760)
+++ libs/libmythtv/avformatdecoder.cpp	(working copy)
@@ -70,7 +70,7 @@
 
 #define MAX_AC3_FRAME_SIZE 6144
 
-static const bool use_reordered_opaque = false;
+static const bool force_reordered_opaque = false;
 
 static const float eps = 1E-5;
 
@@ -259,6 +259,10 @@
       start_code_state(0xffffffff),
       lastvpts(0),                  lastapts(0),
       lastccptsu(0),
+      faulty_pts(0),                faulty_dts(0),
+      pts_detected(false),
+      last_dts_for_fault_detection(0),
+      last_pts_for_fault_detection(0),
       using_null_videoout(use_null_videoout),
       video_codec_id(kCodec_NONE),
       no_hardware_decoders(no_hardware_decode),
@@ -647,6 +651,11 @@
         lastapts = 0;
         lastvpts = 0;
         lastccptsu = 0;
+        faulty_pts = faulty_dts = 0;
+        last_dts_for_fault_detection = 0;
+        last_pts_for_fault_detection = 0;
+        pts_detected = false;
+
         av_read_frame_flush(ic);
 
         // Only reset the internal state if we're using our seeking,
@@ -2717,6 +2726,10 @@
                 gopset = false;
                 prevgoppos = 0;
                 lastapts = lastvpts = lastccptsu = 0;
+                faulty_pts = faulty_dts = 0;
+                last_dts_for_fault_detection = 0;
+                last_pts_for_fault_detection = 0;
+                pts_detected = false;
 
                 // fps debugging info
                 float avFPS = normalized_fps(stream, context);
@@ -2819,6 +2832,10 @@
             gopset = false;
             prevgoppos = 0;
             lastapts = lastvpts = lastccptsu = 0;
+            faulty_pts = faulty_dts = 0;
+            last_dts_for_fault_detection = 0;
+            last_pts_for_fault_detection = 0;
+            pts_detected = false;
 
             // fps debugging info
             float avFPS = normalized_fps(stream, context);
@@ -2991,12 +3008,28 @@
         return false;
     }
 
-    if ((use_reordered_opaque || pkt->dts == (int64_t)AV_NOPTS_VALUE) &&
+    if(pkt->dts != (int64_t)AV_NOPTS_VALUE){
+        faulty_dts += pkt->dts <= last_dts_for_fault_detection;
+        last_dts_for_fault_detection = pkt->dts;
+    }
+    if(mpa_pic.reordered_opaque != (int64_t)AV_NOPTS_VALUE){
+        faulty_pts += mpa_pic.reordered_opaque <= last_pts_for_fault_detection;
+        last_pts_for_fault_detection = mpa_pic.reordered_opaque;
+        pts_detected = true;
+    }
+
+    // Prefer reordered_opaque (PTS) timestamps if they are not faulty and exist,
+    // also use fixups for missing PTS instead of selecting DTS to avoid
+    // oscillating between PTS and DTS.
+    // Select DTS timestamps if PTS is more faulty or never detected
+    if ((force_reordered_opaque || faulty_pts <= faulty_dts ||
+        pkt->dts == (int64_t)AV_NOPTS_VALUE) &&
         mpa_pic.reordered_opaque != (int64_t)AV_NOPTS_VALUE)
     {
         pts = (long long)mpa_pic.reordered_opaque;
     }
-    else if (pkt->dts != (int64_t)AV_NOPTS_VALUE)
+    else if ((faulty_dts < faulty_pts || !pts_detected) &&
+             pkt->dts != (int64_t)AV_NOPTS_VALUE)
     {
         pts = (long long)pkt->dts;
     }
Index: libs/libmythtv/avformatdecoder.h
===================================================================
--- libs/libmythtv/avformatdecoder.h	(revision 25760)
+++ libs/libmythtv/avformatdecoder.h	(working copy)
@@ -270,6 +270,12 @@
     long long lastapts;
     long long lastccptsu;
 
+    int64_t faulty_pts;
+    int64_t faulty_dts;
+    int64_t last_dts_for_fault_detection;
+    int64_t last_pts_for_fault_detection;
+    bool pts_detected;
+
     bool using_null_videoout;
     MythCodecID video_codec_id;
     bool no_hardware_decoders;