libavformat/img2.c:269: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

libavformat/img2.c:245:1: <LHS trace>
243. }
244. 
245. static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
     ^
246. {
247.     VideoData *s = s1->priv_data;

libavformat/img2.c:245:1: Array declaration
243. }
244. 
245. static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
     ^
246. {
247.     VideoData *s = s1->priv_data;

libavformat/img2.c:269:13: Binary operation: ([0, +oo] - 1):unsigned64
267.             if(codec->codec_id != CODEC_ID_RAWVIDEO)
268.                 break;
269.             filename[ strlen(filename) - 1 ]= 'U' + i;
                 ^
270.         }
271. 
