jpeg2k is intra only codec

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@16663 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/utils.c

@@ -713,6 +713,7 @@ static int is_intra_only(AVCodecContext *enc){
         case CODEC_ID_ASV2:
         case CODEC_ID_VCR1:
         case CODEC_ID_DNXHD:
+        case CODEC_ID_JPEG2000:
             return 1;
         default: break;
         }