libavcodec/vorbisenc.c:977: error: Null Dereference
  pointer `avccontext->coded_frame` last assigned on line 976 could be null and is dereferenced at line 977, column 5.

libavcodec/vorbisenc.c:955:1: start of procedure vorbis_encode_init()
953. }
954. 
955. static av_cold int vorbis_encode_init(AVCodecContext *avccontext)
     ^
956. {
957.     vorbis_enc_context *venc = avccontext->priv_data;

libavcodec/vorbisenc.c:957:5: 
955. static av_cold int vorbis_encode_init(AVCodecContext *avccontext)
956. {
957.     vorbis_enc_context *venc = avccontext->priv_data;
         ^
958. 
959.     if (avccontext->channels != 2) {

libavcodec/vorbisenc.c:959:9: Taking false branch
957.     vorbis_enc_context *venc = avccontext->priv_data;
958. 
959.     if (avccontext->channels != 2) {
             ^
960.         av_log(avccontext, AV_LOG_ERROR, "Current Libav Vorbis encoder only supports 2 channels.\n");
961.         return -1;

libavcodec/vorbisenc.c:964:5: Skipping create_vorbis_context(): empty list of specs
962.     }
963. 
964.     create_vorbis_context(venc, avccontext);
         ^
965. 
966.     if (avccontext->flags & CODEC_FLAG_QSCALE)

libavcodec/vorbisenc.c:966:9: Taking true branch
964.     create_vorbis_context(venc, avccontext);
965. 
966.     if (avccontext->flags & CODEC_FLAG_QSCALE)
             ^
967.         venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;
968.     else

libavcodec/vorbisenc.c:967:9: 
965. 
966.     if (avccontext->flags & CODEC_FLAG_QSCALE)
967.         venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;
             ^
968.     else
969.         venc->quality = 0.03;

libavcodec/vorbisenc.c:970:5: 
968.     else
969.         venc->quality = 0.03;
970.     venc->quality *= venc->quality;
         ^
971. 
972.     avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);

libavcodec/vorbisenc.c:972:5: Skipping put_main_header(): empty list of specs
970.     venc->quality *= venc->quality;
971. 
972.     avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
         ^
973. 
974.     avccontext->frame_size     = 1 << (venc->log2_blocksize[0] - 1);

libavcodec/vorbisenc.c:974:5: 
972.     avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
973. 
974.     avccontext->frame_size     = 1 << (venc->log2_blocksize[0] - 1);
         ^
975. 
976.     avccontext->coded_frame            = avcodec_alloc_frame();

libavcodec/vorbisenc.c:976:5: 
974.     avccontext->frame_size     = 1 << (venc->log2_blocksize[0] - 1);
975. 
976.     avccontext->coded_frame            = avcodec_alloc_frame();
         ^
977.     avccontext->coded_frame->key_frame = 1;
978. 

libavcodec/utils.c:447:1: start of procedure avcodec_alloc_frame()
  445. }
  446. 
  447. AVFrame *avcodec_alloc_frame(void){
       ^
  448.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  449. 

libavcodec/utils.c:448:5: 
  446. 
  447. AVFrame *avcodec_alloc_frame(void){
  448.     AVFrame *pic= av_malloc(sizeof(AVFrame));
           ^
  449. 
  450.     if(pic==NULL) return NULL;

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)

libavcodec/utils.c:450:8: Taking true branch
  448.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  449. 
  450.     if(pic==NULL) return NULL;
              ^
  451. 
  452.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:450:19: 
  448.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  449. 
  450.     if(pic==NULL) return NULL;
                         ^
  451. 
  452.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:455:1: return from a call to avcodec_alloc_frame
  453. 
  454.     return pic;
  455. }
       ^
  456. 
  457. int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)

libavcodec/vorbisenc.c:977:5: 
975. 
976.     avccontext->coded_frame            = avcodec_alloc_frame();
977.     avccontext->coded_frame->key_frame = 1;
         ^
978. 
979.     return 0;

static av_cold int vorbis_encode_init(AVCodecContext *avccontext)
{
    vorbis_enc_context *venc = avccontext->priv_data;
    if (avccontext->channels != 2) {
        av_log(avccontext, AV_LOG_ERROR, "Current Libav Vorbis encoder only supports 2 channels.\n");
        return -1;
    }
    create_vorbis_context(venc, avccontext);
    if (avccontext->flags & CODEC_FLAG_QSCALE)
        venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;
    else
        venc->quality = 0.03;
    venc->quality *= venc->quality;
    avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
    avccontext->frame_size     = 1 << (venc->log2_blocksize[0] - 1);
    avccontext->coded_frame            = avcodec_alloc_frame();
    avccontext->coded_frame->key_frame = 1;
    return 0;
}
['static av_cold int vorbis_encode_init(AVCodecContext *avccontext)\n{\n    vorbis_enc_context *venc = avccontext->priv_data;\n    if (avccontext->channels != 2) {\n        av_log(avccontext, AV_LOG_ERROR, "Current Libav Vorbis encoder only supports 2 channels.\\n");\n        return -1;\n    }\n    create_vorbis_context(venc, avccontext);\n    if (avccontext->flags & CODEC_FLAG_QSCALE)\n        venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;\n    else\n        venc->quality = 0.03;\n    venc->quality *= venc->quality;\n    avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);\n    avccontext->frame_size     = 1 << (venc->log2_blocksize[0] - 1);\n    avccontext->coded_frame            = avcodec_alloc_frame();\n    avccontext->coded_frame->key_frame = 1;\n    return 0;\n}', 'AVFrame *avcodec_alloc_frame(void){\n    AVFrame *pic= av_malloc(sizeof(AVFrame));\n    if(pic==NULL) return NULL;\n    avcodec_get_frame_defaults(pic);\n    return pic;\n}', 'void *av_malloc(size_t size)\n{\n    void *ptr = NULL;\n#if CONFIG_MEMALIGN_HACK\n    long diff;\n#endif\n    if(size > (INT_MAX-32) )\n        return NULL;\n#if CONFIG_MEMALIGN_HACK\n    ptr = malloc(size+32);\n    if(!ptr)\n        return ptr;\n    diff= ((-(long)ptr - 1)&31) + 1;\n    ptr = (char*)ptr + diff;\n    ((char*)ptr)[-1]= diff;\n#elif HAVE_POSIX_MEMALIGN\n    if (posix_memalign(&ptr,32,size))\n        ptr = NULL;\n#elif HAVE_MEMALIGN\n    ptr = memalign(32,size);\n#else\n    ptr = malloc(size);\n#endif\n    return ptr;\n}']