libavutil/buffer.c:194: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 154, column 25 is not reachable after line 194, column 1.

libavutil/buffer.c:146:1: start of procedure av_buffer_realloc()
144. }
145. 
146. int av_buffer_realloc(AVBufferRef **pbuf, int size)
     ^
147. {
148.     AVBufferRef *buf = *pbuf;

libavutil/buffer.c:148:5: 
146. int av_buffer_realloc(AVBufferRef **pbuf, int size)
147. {
148.     AVBufferRef *buf = *pbuf;
         ^
149.     uint8_t *tmp;
150. 

libavutil/buffer.c:151:10: Taking true branch
149.     uint8_t *tmp;
150. 
151.     if (!buf) {
              ^
152.         /* allocate a new buffer with av_realloc(), so it will be reallocatable
153.          * later */

libavutil/buffer.c:154:9: 
152.         /* allocate a new buffer with av_realloc(), so it will be reallocatable
153.          * later */
154.         uint8_t *data = av_realloc(NULL, size);
             ^
155.         if (!data)
156.             return AVERROR(ENOMEM);

libavutil/mem.c:116:1: start of procedure av_realloc()
  114. }
  115. 
  116. void *av_realloc(void *ptr, size_t size)
       ^
  117. {
  118. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:123:9: Taking false branch
  121. 
  122.     /* let's disallow possibly ambiguous cases */
  123.     if (size > (INT_MAX - 16))
               ^
  124.         return NULL;
  125. 

libavutil/mem.c:135:5: 
  133.     return _aligned_realloc(ptr, size, 32);
  134. #else
  135.     return realloc(ptr, size);
           ^
  136. #endif
  137. }

libavutil/mem.c:137:1: return from a call to av_realloc
  135.     return realloc(ptr, size);
  136. #endif
  137. }
       ^
  138. 
  139. void *av_realloc_array(void *ptr, size_t nmemb, size_t size)

libavutil/buffer.c:155:14: Taking false branch
153.          * later */
154.         uint8_t *data = av_realloc(NULL, size);
155.         if (!data)
                  ^
156.             return AVERROR(ENOMEM);
157. 

libavutil/buffer.c:158:9: Skipping av_buffer_create(): empty list of specs
156.             return AVERROR(ENOMEM);
157. 
158.         buf = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);
             ^
159.         if (!buf) {
160.             av_freep(&data);

libavutil/buffer.c:159:14: Taking false branch
157. 
158.         buf = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);
159.         if (!buf) {
                  ^
160.             av_freep(&data);
161.             return AVERROR(ENOMEM);

libavutil/buffer.c:164:9: 
162.         }
163. 
164.         buf->buffer->flags |= BUFFER_FLAG_REALLOCATABLE;
             ^
165.         *pbuf = buf;
166. 

libavutil/buffer.c:165:9: 
163. 
164.         buf->buffer->flags |= BUFFER_FLAG_REALLOCATABLE;
165.         *pbuf = buf;
             ^
166. 
167.         return 0;

libavutil/buffer.c:167:9: 
165.         *pbuf = buf;
166. 
167.         return 0;
             ^
168.     } else if (buf->size == size)
169.         return 0;

libavutil/buffer.c:194:1: return from a call to av_buffer_realloc
192.     buf->buffer->size = buf->size = size;
193.     return 0;
194. }
     ^
195. 
196. AVBufferPool *av_buffer_pool_init(int size, AVBufferRef* (*alloc)(int size))

int av_buffer_realloc(AVBufferRef **pbuf, int size)
{
    AVBufferRef *buf = *pbuf;
    uint8_t *tmp;
    if (!buf) {
        uint8_t *data = av_realloc(NULL, size);
        if (!data)
            return AVERROR(ENOMEM);
        buf = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);
        if (!buf) {
            av_freep(&data);
            return AVERROR(ENOMEM);
        }
        buf->buffer->flags |= BUFFER_FLAG_REALLOCATABLE;
        *pbuf = buf;
        return 0;
    } else if (buf->size == size)
        return 0;
    if (!(buf->buffer->flags & BUFFER_FLAG_REALLOCATABLE) ||
        !av_buffer_is_writable(buf)) {
        AVBufferRef *new = NULL;
        av_buffer_realloc(&new, size);
        if (!new)
            return AVERROR(ENOMEM);
        memcpy(new->data, buf->data, FFMIN(size, buf->size));
        av_buffer_unref(pbuf);
        *pbuf = new;
        return 0;
    }
    tmp = av_realloc(buf->buffer->data, size);
    if (!tmp)
        return AVERROR(ENOMEM);
    buf->buffer->data = buf->data = tmp;
    buf->buffer->size = buf->size = size;
    return 0;
}
['int av_buffer_realloc(AVBufferRef **pbuf, int size)\n{\n    AVBufferRef *buf = *pbuf;\n    uint8_t *tmp;\n    if (!buf) {\n        uint8_t *data = av_realloc(NULL, size);\n        if (!data)\n            return AVERROR(ENOMEM);\n        buf = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);\n        if (!buf) {\n            av_freep(&data);\n            return AVERROR(ENOMEM);\n        }\n        buf->buffer->flags |= BUFFER_FLAG_REALLOCATABLE;\n        *pbuf = buf;\n        return 0;\n    } else if (buf->size == size)\n        return 0;\n    if (!(buf->buffer->flags & BUFFER_FLAG_REALLOCATABLE) ||\n        !av_buffer_is_writable(buf)) {\n        AVBufferRef *new = NULL;\n        av_buffer_realloc(&new, size);\n        if (!new)\n            return AVERROR(ENOMEM);\n        memcpy(new->data, buf->data, FFMIN(size, buf->size));\n        av_buffer_unref(pbuf);\n        *pbuf = new;\n        return 0;\n    }\n    tmp = av_realloc(buf->buffer->data, size);\n    if (!tmp)\n        return AVERROR(ENOMEM);\n    buf->buffer->data = buf->data = tmp;\n    buf->buffer->size = buf->size = size;\n    return 0;\n}', 'void *av_realloc(void *ptr, size_t size)\n{\n#if CONFIG_MEMALIGN_HACK\n    int diff;\n#endif\n    if (size > (INT_MAX - 16))\n        return NULL;\n#if CONFIG_MEMALIGN_HACK\n    if (!ptr)\n        return av_malloc(size);\n    diff = ((char *)ptr)[-1];\n    return (char *)realloc((char *)ptr - diff, size + diff) + diff;\n#elif HAVE_ALIGNED_MALLOC\n    return _aligned_realloc(ptr, size, 32);\n#else\n    return realloc(ptr, size);\n#endif\n}']