+ if(s->codec_id != CODEC_ID_H264){
+ if((s->last_picture_ptr==NULL || s->last_picture_ptr->data[0]==NULL) && s->pict_type!=FF_I_TYPE){
+ av_log(avctx, AV_LOG_ERROR, "warning: first frame is no keyframe\n");
+ /* Allocate a dummy frame */
+ i= ff_find_unused_picture(s, 0);
+ s->last_picture_ptr= &s->picture[i];
+ if(ff_alloc_picture(s, s->last_picture_ptr, 0) < 0)
+ return -1;
+ }
+ if((s->next_picture_ptr==NULL || s->next_picture_ptr->data[0]==NULL) && s->pict_type==FF_B_TYPE){
+ /* Allocate a dummy frame */
+ i= ff_find_unused_picture(s, 0);
+ s->next_picture_ptr= &s->picture[i];
+ if(ff_alloc_picture(s, s->next_picture_ptr, 0) < 0)
+ return -1;
+ }
+ }
+