libavformat/rtsp.c:1663: error: Null Dereference
  pointer `content` last assigned on line 1657 could be null and is dereferenced at line 1663, column 5.

libavformat/rtsp.c:1646:1: start of procedure sdp_read_header()
1644. #define SDP_MAX_SIZE 8192
1645. 
1646. static int sdp_read_header(AVFormatContext *s,
      ^
1647.                            AVFormatParameters *ap)
1648. {

libavformat/rtsp.c:1649:5: 
1647.                            AVFormatParameters *ap)
1648. {
1649.     RTSPState *rt = s->priv_data;
          ^
1650.     RTSPStream *rtsp_st;
1651.     int size, i, err;

libavformat/rtsp.c:1657:5: 
1655.     /* read the whole sdp file */
1656.     /* XXX: better loading */
1657.     content = av_malloc(SDP_MAX_SIZE);
          ^
1658.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1659.     if (size <= 0) {

libavutil/mem.c:47:1: start of procedure av_malloc()
  45.    linker will do it automatically. */
  46. 
  47. void *av_malloc(unsigned int size)
      ^
  48. {
  49.     void *ptr = NULL;

libavutil/mem.c:49:5: 
  47. void *av_malloc(unsigned int size)
  48. {
  49.     void *ptr = NULL;
          ^
  50. #if CONFIG_MEMALIGN_HACK
  51.     long diff;

libavutil/mem.c:55:8: Taking false branch
  53. 
  54.     /* let's disallow possible ambiguous cases */
  55.     if(size > (INT_MAX-16) )
             ^
  56.         return NULL;
  57. 

libavutil/mem.c:66:9: Taking true branch
  64.     ((char*)ptr)[-1]= diff;
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
              ^
  67.         ptr = NULL;
  68. #elif HAVE_MEMALIGN

libavutil/mem.c:67:9: 
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
  67.         ptr = NULL;
              ^
  68. #elif HAVE_MEMALIGN
  69.     ptr = memalign(16,size);

libavutil/mem.c:99:5: 
   97.     ptr = malloc(size);
   98. #endif
   99.     return ptr;
           ^
  100. }
  101. 

libavutil/mem.c:100:1: return from a call to av_malloc
   98. #endif
   99.     return ptr;
  100. }
       ^
  101. 
  102. void *av_realloc(void *ptr, unsigned int size)

libavformat/rtsp.c:1658:5: Skipping get_buffer(): empty list of specs
1656.     /* XXX: better loading */
1657.     content = av_malloc(SDP_MAX_SIZE);
1658.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
          ^
1659.     if (size <= 0) {
1660.         av_free(content);

libavformat/rtsp.c:1659:9: Taking false branch
1657.     content = av_malloc(SDP_MAX_SIZE);
1658.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1659.     if (size <= 0) {
              ^
1660.         av_free(content);
1661.         return AVERROR_INVALIDDATA;

libavformat/rtsp.c:1663:5: 
1661.         return AVERROR_INVALIDDATA;
1662.     }
1663.     content[size] ='\0';
          ^
1664. 
1665.     sdp_parse(s, content);
