libavformat/matroskadec.c:834: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 834, column 24 is not reachable after line 834, column 13.

libavformat/matroskadec.c:817:1: start of procedure matroska_decode_buffer()
815. }
816. 
817. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
818.                                   MatroskaTrack *track)
819. {

libavformat/matroskadec.c:820:5: 
818.                                   MatroskaTrack *track)
819. {
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;

libavformat/matroskadec.c:821:5: 
819. {
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
821.     uint8_t* data = *buf;
         ^
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:822:5: 
820.     MatroskaTrackEncoding *encodings = track->encodings.elem;
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;
         ^
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;

libavformat/matroskadec.c:823:5: 
821.     uint8_t* data = *buf;
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;
         ^
824.     int pkt_size = isize;
825.     int result = 0;

libavformat/matroskadec.c:824:5: 
822.     int isize = *buf_size;
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;
         ^
825.     int result = 0;
826.     int olen;

libavformat/matroskadec.c:825:5: 
823.     uint8_t* pkt_data = NULL;
824.     int pkt_size = isize;
825.     int result = 0;
         ^
826.     int olen;
827. 

libavformat/matroskadec.c:828:5: 
826.     int olen;
827. 
828.     switch (encodings[0].compression.algo) {
         ^
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
830.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:829:5: Switch condition is false. Skipping switch case
827. 
828.     switch (encodings[0].compression.algo) {
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
830.         return encodings[0].compression.settings.size;
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:831:5: Switch condition is true. Entering switch case
829.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
830.         return encodings[0].compression.settings.size;
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
832.         do {
833.             olen = pkt_size *= 3;

libavformat/matroskadec.c:833:13: 
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
832.         do {
833.             olen = pkt_size *= 3;
                 ^
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);

libavformat/matroskadec.c:834:13: 
832.         do {
833.             olen = pkt_size *= 3;
834.             pkt_data = av_realloc(pkt_data,
                 ^
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);

libavutil/mem.c:94:1: start of procedure av_realloc()
  92. }
  93. 
  94. void *av_realloc(void *ptr, unsigned int size)
      ^
  95. {
  96. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:101:8: Taking false branch
   99. 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
              ^
  102.         return NULL;
  103. 

libavutil/mem.c:110:5: 
  108.     return (char*)realloc((char*)ptr - diff, size + diff) + diff;
  109. #else
  110.     return realloc(ptr, size);
           ^
  111. #endif
  112. }

libavutil/mem.c:112:1: return from a call to av_realloc
  110.     return realloc(ptr, size);
  111. #endif
  112. }
       ^
  113. 
  114. void av_free(void *ptr)

libavformat/matroskadec.c:836:13: Skipping lzo1x_decode(): empty list of specs
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
                 ^
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
838.         if (result)

libavformat/matroskadec.c:837:18: Loop condition is true. Entering loop body
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
                      ^
838.         if (result)
839.             goto failed;

libavformat/matroskadec.c:837:45: Loop condition is true. Entering loop body
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);
837.         } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
                                                 ^
838.         if (result)
839.             goto failed;

libavformat/matroskadec.c:833:13: 
831.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
832.         do {
833.             olen = pkt_size *= 3;
                 ^
834.             pkt_data = av_realloc(pkt_data,
835.                                   pkt_size+LZO_OUTPUT_PADDING);

libavformat/matroskadec.c:834:13: 
832.         do {
833.             olen = pkt_size *= 3;
834.             pkt_data = av_realloc(pkt_data,
                 ^
835.                                   pkt_size+LZO_OUTPUT_PADDING);
836.             result = lzo1x_decode(pkt_data, &olen, data, &isize);

libavutil/mem.c:94:1: start of procedure av_realloc()
  92. }
  93. 
  94. void *av_realloc(void *ptr, unsigned int size)
      ^
  95. {
  96. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:101:8: Taking true branch
   99. 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
              ^
  102.         return NULL;
  103. 

libavutil/mem.c:102:9: 
  100.     /* let's disallow possible ambiguous cases */
  101.     if(size > (INT_MAX-16) )
  102.         return NULL;
               ^
  103. 
  104. #ifdef CONFIG_MEMALIGN_HACK

libavutil/mem.c:112:1: return from a call to av_realloc
  110.     return realloc(ptr, size);
  111. #endif
  112. }
       ^
  113. 
  114. void av_free(void *ptr)
