Provide a simpler way for the user to reorder her timestamps.

Originally committed as revision 14871 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/utils.c

@@ -285,6 +285,8 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
     }
     s->internal_buffer_count++;
 
+    pic->reordered_opaque= s->reordered_opaque;
+
     if(s->debug&FF_DEBUG_BUFFERS)
         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);