libavformat/img2dec.c:252: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

libavformat/img2dec.c:220:1: <LHS trace>
218. }
219. 
220. static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
     ^
221. {
222.     VideoDemuxData *s = s1->priv_data;

libavformat/img2dec.c:220:1: Array declaration
218. }
219. 
220. static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
     ^
221. {
222.     VideoDemuxData *s = s1->priv_data;

libavformat/img2dec.c:252:13: Binary operation: ([0, +oo] - 1):unsigned64
250.             if (codec->codec_id != AV_CODEC_ID_RAWVIDEO)
251.                 break;
252.             filename[strlen(filename) - 1] = 'U' + i;
                 ^
253.         }
254. 
