From 5b0e7dacd83580a9a4faf0535606fcf47844ee1d Mon Sep 17 00:00:00 2001
From: Michael Niedermayer
Date: Sun, 25 May 2008 14:07:35 +0000
Subject: Fix MB skipping with droppable frames. Fixes issue323.

Originally committed as revision 13378 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpegvideo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libavcodec/mpegvideo.c')

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 4faf85f206..7a2deae72a 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -236,7 +236,7 @@ int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
     /* It might be nicer if the application would keep track of these
      * but it would require an API change. */
     memmove(s->prev_pict_types+1, s->prev_pict_types, PREV_PICT_TYPES_BUFFER_SIZE-1);
-    s->prev_pict_types[0]= s->pict_type;
+    s->prev_pict_types[0]= s->dropable ? FF_B_TYPE : s->pict_type;
     if(pic->age < PREV_PICT_TYPES_BUFFER_SIZE && s->prev_pict_types[pic->age] == FF_B_TYPE)
         pic->age= INT_MAX; // Skipped MBs in B-frames are quite rare in MPEG-1/2 and it is a bit tricky to skip them anyway.
 
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