libavformat/img2.c:349: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

libavformat/img2.c:331:1: <LHS trace>
329. }
330. 
331. static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
     ^
332. {
333.     VideoData *img = s->priv_data;

libavformat/img2.c:331:1: Array declaration
329. }
330. 
331. static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
     ^
332. {
333.     VideoData *img = s->priv_data;

libavformat/img2.c:349:13: Binary operation: ([0, +oo] - 1):unsigned64
347.             if(codec->codec_id != CODEC_ID_RAWVIDEO)
348.                 break;
349.             filename[ strlen(filename) - 1 ]= 'U' + i;
                 ^
350.         }
351.     } else {
