@@ -197,11 +197,16 @@ AVStream *add_video_stream(AVFormatContext *oc, int codec_id)

     c->frame_rate = STREAM_FRAME_RATE;  

     c->frame_rate_base = 1;

     c->gop_size = 12; /* emit one intra frame every twelve frames at most */

-    if (c->codec_id == CODEC_ID_MPEG1VIDEO ||

-        c->codec_id == CODEC_ID_MPEG2VIDEO) {

+    if (c->codec_id == CODEC_ID_MPEG2VIDEO) {

         /* just for testing, we also add B frames */

         c->max_b_frames = 2;

     }

+    if (c->codec_id == CODEC_ID_MPEG1VIDEO){

+        /* needed to avoid using macroblocks in which some coeffs overflow 

+           this doesnt happen with normal video, it just happens here as the 

+           motion of the chroma plane doesnt match the luma plane */

+        c->mb_decision=2;

+    }

     // some formats want stream headers to be seperate

     if(!strcmp(oc->oformat->name, "mp4") || !strcmp(oc->oformat->name, "mov") || !strcmp(oc->oformat->name, "3gp"))

         c->flags |= CODEC_FLAG_GLOBAL_HEADER;