Fix lossless transcode artifacts

Fixes #11044 Signed-off-by: Gavin Hurlbut <ghurlbut@mythtv.org>
MythTV · Aug 28, 2012 · 9ed48cb · 9ed48cb
1 parent 456e356
commit 9ed48cb
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/mythtv/programs/mythtranscode/mpeg2fix.cpp b/mythtv/programs/mythtranscode/mpeg2fix.cpp
@@ -1530,7 +1530,7 @@ MPEG2frame *MPEG2fixup::FindFrameNum(int frameNum)
 
 void MPEG2fixup::RenumberFrames(int start_pos, int delta)
 {
-    int maxPos = vFrame.count();
+    int maxPos = vFrame.count() - 1;
 
     for (int pos = start_pos; pos < maxPos; pos++)
     {
@@ -1736,8 +1736,8 @@ int MPEG2fixup::InsertFrame(int frameNum, int64_t deltaPTS,
 
     inc2x33(&pkt.pts, ptsIncrement * GetNbFields(spare) / 2 + initPTS);
 
-    index = vFrame.indexOf(spare);
-    while (index < vFrame.count() - 1 &&
+    index = vFrame.indexOf(spare) + 1;
+    while (index < vFrame.count() &&
            GetFrameTypeT(vFrame.at(index)) == 'B')
         spare = vFrame.at(index++);
 
@@ -1762,7 +1762,8 @@ int MPEG2fixup::InsertFrame(int frameNum, int64_t deltaPTS,
 
     av_free(pkt.data);
 
-    // update frame # for all frames in this group
+    // update frame # for all later frames in this group
+    index++;
     RenumberFrames(index, increment);
 
     return increment;