avconv.c:3367: error: Null Dereference
  pointer `oc` last assigned on line 3346 could be null and is dereferenced at line 3367, column 5.

avconv.c:3334:1: start of procedure opt_output_file()
3332. }
3333. 
3334. static void opt_output_file(void *optctx, const char *filename)
      ^
3335. {
3336.     OptionsContext *o = optctx;

avconv.c:3336:5: 
3334. static void opt_output_file(void *optctx, const char *filename)
3335. {
3336.     OptionsContext *o = optctx;
          ^
3337.     AVFormatContext *oc;
3338.     int i, err;

avconv.c:3343:10: Taking true branch
3341.     InputStream  *ist;
3342. 
3343.     if (!strcmp(filename, "-"))
               ^
3344.         filename = "pipe:";
3345. 

avconv.c:3344:9: 
3342. 
3343.     if (!strcmp(filename, "-"))
3344.         filename = "pipe:";
              ^
3345. 
3346.     oc = avformat_alloc_context();

avconv.c:3346:5: 
3344.         filename = "pipe:";
3345. 
3346.     oc = avformat_alloc_context();
          ^
3347.     if (!oc) {
3348.         print_error(filename, AVERROR(ENOMEM));

libavformat/options.c:118:1: start of procedure avformat_alloc_context()
  116. }
  117. 
  118. AVFormatContext *avformat_alloc_context(void)
       ^
  119. {
  120.     AVFormatContext *ic;

libavformat/options.c:121:5: 
  119. {
  120.     AVFormatContext *ic;
  121.     ic = av_malloc(sizeof(AVFormatContext));
           ^
  122.     if (!ic) return ic;
  123.     avformat_get_context_defaults(ic);

libavutil/mem.c:64:1: start of procedure av_malloc()
    62.    linker will do it automatically. */
    63. 
    64. void *av_malloc(size_t size)
        ^
    65. {
    66.     void *ptr = NULL;

libavutil/mem.c:66:5: 
    64. void *av_malloc(size_t size)
    65. {
    66.     void *ptr = NULL;
            ^
    67. #if CONFIG_MEMALIGN_HACK
    68.     long diff;

libavutil/mem.c:72:8: Taking false branch
    70. 
    71.     /* let's disallow possible ambiguous cases */
    72.     if(size > (INT_MAX-32) )
               ^
    73.         return NULL;
    74. 

libavutil/mem.c:83:9: Taking false branch
    81.     ((char*)ptr)[-1]= diff;
    82. #elif HAVE_POSIX_MEMALIGN
    83.     if (posix_memalign(&ptr,32,size))
                ^
    84.         ptr = NULL;
    85. #elif HAVE_MEMALIGN

libavutil/mem.c:114:5: 
    112.     ptr = malloc(size);
    113. #endif
    114.     return ptr;
             ^
    115. }
    116. 

libavutil/mem.c:115:1: return from a call to av_malloc
    113. #endif
    114.     return ptr;
    115. }
         ^
    116. 
    117. void *av_realloc(void *ptr, size_t size)

libavformat/options.c:122:10: Taking true branch
  120.     AVFormatContext *ic;
  121.     ic = av_malloc(sizeof(AVFormatContext));
  122.     if (!ic) return ic;
                ^
  123.     avformat_get_context_defaults(ic);
  124.     return ic;

libavformat/options.c:122:14: 
  120.     AVFormatContext *ic;
  121.     ic = av_malloc(sizeof(AVFormatContext));
  122.     if (!ic) return ic;
                    ^
  123.     avformat_get_context_defaults(ic);
  124.     return ic;

libavformat/options.c:125:1: return from a call to avformat_alloc_context
  123.     avformat_get_context_defaults(ic);
  124.     return ic;
  125. }
       ^
  126. 
  127. const AVClass *avformat_get_class(void)

avconv.c:3347:10: Taking true branch
3345. 
3346.     oc = avformat_alloc_context();
3347.     if (!oc) {
               ^
3348.         print_error(filename, AVERROR(ENOMEM));
3349.         exit_program(1);

avconv.c:3348:9: 
3346.     oc = avformat_alloc_context();
3347.     if (!oc) {
3348.         print_error(filename, AVERROR(ENOMEM));
              ^
3349.         exit_program(1);
3350.     }

cmdutils.c:425:1: start of procedure print_error()
  423. }
  424. 
  425. void print_error(const char *filename, int err)
       ^
  426. {
  427.     char errbuf[128];

cmdutils.c:428:5: 
  426. {
  427.     char errbuf[128];
  428.     const char *errbuf_ptr = errbuf;
           ^
  429. 
  430.     if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)

cmdutils.c:430:9: Taking true branch
  428.     const char *errbuf_ptr = errbuf;
  429. 
  430.     if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
               ^
  431.         errbuf_ptr = strerror(AVUNERROR(err));
  432.     av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);

cmdutils.c:431:9: Skipping strerror(): method has no implementation
  429. 
  430.     if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
  431.         errbuf_ptr = strerror(AVUNERROR(err));
               ^
  432.     av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
  433. }

cmdutils.c:432:5: Skipping av_log(): empty list of specs
  430.     if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
  431.         errbuf_ptr = strerror(AVUNERROR(err));
  432.     av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
           ^
  433. }
  434. 

cmdutils.c:433:1: return from a call to print_error
  431.         errbuf_ptr = strerror(AVUNERROR(err));
  432.     av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
  433. }
       ^
  434. 
  435. static int warned_cfg = 0;

avconv.c:3349:9: Skipping exit_program(): empty list of specs
3347.     if (!oc) {
3348.         print_error(filename, AVERROR(ENOMEM));
3349.         exit_program(1);
              ^
3350.     }
3351. 

avconv.c:3352:9: Taking true branch
3350.     }
3351. 
3352.     if (o->format) {
              ^
3353.         file_oformat = av_guess_format(o->format, NULL, NULL);
3354.         if (!file_oformat) {

avconv.c:3353:9: Skipping av_guess_format(): empty list of specs
3351. 
3352.     if (o->format) {
3353.         file_oformat = av_guess_format(o->format, NULL, NULL);
              ^
3354.         if (!file_oformat) {
3355.             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);

avconv.c:3354:14: Taking false branch
3352.     if (o->format) {
3353.         file_oformat = av_guess_format(o->format, NULL, NULL);
3354.         if (!file_oformat) {
                   ^
3355.             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
3356.             exit_program(1);

avconv.c:3367:5: 
3365.     }
3366. 
3367.     oc->oformat = file_oformat;
          ^
3368.     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
3369. 
