Support PARSER_FLAG_COMPLETE_FRAMES for h261 and h263 parsers.
diff --git a/libavcodec/h261_parser.c b/libavcodec/h261_parser.c
index defc1cb..4d20afe 100644
--- a/libavcodec/h261_parser.c
+++ b/libavcodec/h261_parser.c
@@ -70,12 +70,16 @@
     ParseContext *pc = s->priv_data;
     int next;
 
+    if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+        next = buf_size;
+    } else {
     next= h261_find_frame_end(pc,avctx, buf, buf_size);
     if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
         *poutbuf = NULL;
         *poutbuf_size = 0;
         return buf_size;
     }
+    }
     *poutbuf = buf;
     *poutbuf_size = buf_size;
     return next;