libavformat/img2enc.c:82: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

libavformat/img2enc.c:56:1: <LHS trace>
54. }
55. 
56. static int write_packet(AVFormatContext *s, AVPacket *pkt)
    ^
57. {
58.     VideoMuxData *img = s->priv_data;

libavformat/img2enc.c:56:1: Array declaration
54. }
55. 
56. static int write_packet(AVFormatContext *s, AVPacket *pkt)
    ^
57. {
58.     VideoMuxData *img = s->priv_data;

libavformat/img2enc.c:82:13: Binary operation: ([0, +oo] - 1):unsigned64
80.             if (codec->codec_id != AV_CODEC_ID_RAWVIDEO)
81.                 break;
82.             filename[strlen(filename) - 1] = 'U' + i;
                ^
83.         }
84.     } else {
