libavcodec/pcm.c:51: error: Null Dereference
  pointer `avctx->coded_frame` last assigned on line 50 could be null and is dereferenced at line 51, column 5.

libavcodec/pcm.c:34:1: start of procedure pcm_encode_init()
32. #define MAX_CHANNELS 64
33. 
34. static av_cold int pcm_encode_init(AVCodecContext *avctx)
    ^
35. {
36.     avctx->frame_size = 1;

libavcodec/pcm.c:36:5: 
34. static av_cold int pcm_encode_init(AVCodecContext *avctx)
35. {
36.     avctx->frame_size = 1;
        ^
37.     switch(avctx->codec->id) {
38.     case CODEC_ID_PCM_ALAW:

libavcodec/pcm.c:37:5: 
35. {
36.     avctx->frame_size = 1;
37.     switch(avctx->codec->id) {
        ^
38.     case CODEC_ID_PCM_ALAW:
39.         pcm_alaw_tableinit();

libavcodec/pcm.c:38:5: Switch condition is false. Skipping switch case
36.     avctx->frame_size = 1;
37.     switch(avctx->codec->id) {
38.     case CODEC_ID_PCM_ALAW:
        ^
39.         pcm_alaw_tableinit();
40.         break;

libavcodec/pcm.c:41:5: Switch condition is false. Skipping switch case
39.         pcm_alaw_tableinit();
40.         break;
41.     case CODEC_ID_PCM_MULAW:
        ^
42.         pcm_ulaw_tableinit();
43.         break;

libavcodec/pcm.c:48:5: 
46.     }
47. 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
        ^
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();

libavcodec/utils.c:1039:1: start of procedure av_get_bits_per_sample()
  1037. #endif
  1038. 
  1039. int av_get_bits_per_sample(enum CodecID codec_id){
        ^
  1040.     switch(codec_id){
  1041.     case CODEC_ID_ADPCM_SBPRO_2:

libavcodec/utils.c:1040:5: 
  1038. 
  1039. int av_get_bits_per_sample(enum CodecID codec_id){
  1040.     switch(codec_id){
            ^
  1041.     case CODEC_ID_ADPCM_SBPRO_2:
  1042.         return 2;

libavcodec/utils.c:1041:5: Switch condition is false. Skipping switch case
  1039. int av_get_bits_per_sample(enum CodecID codec_id){
  1040.     switch(codec_id){
  1041.     case CODEC_ID_ADPCM_SBPRO_2:
            ^
  1042.         return 2;
  1043.     case CODEC_ID_ADPCM_SBPRO_3:

libavcodec/utils.c:1043:5: Switch condition is false. Skipping switch case
  1041.     case CODEC_ID_ADPCM_SBPRO_2:
  1042.         return 2;
  1043.     case CODEC_ID_ADPCM_SBPRO_3:
            ^
  1044.         return 3;
  1045.     case CODEC_ID_ADPCM_SBPRO_4:

libavcodec/utils.c:1045:5: Switch condition is false. Skipping switch case
  1043.     case CODEC_ID_ADPCM_SBPRO_3:
  1044.         return 3;
  1045.     case CODEC_ID_ADPCM_SBPRO_4:
            ^
  1046.     case CODEC_ID_ADPCM_CT:
  1047.     case CODEC_ID_ADPCM_IMA_WAV:

libavcodec/utils.c:1046:5: Switch condition is false. Skipping switch case
  1044.         return 3;
  1045.     case CODEC_ID_ADPCM_SBPRO_4:
  1046.     case CODEC_ID_ADPCM_CT:
            ^
  1047.     case CODEC_ID_ADPCM_IMA_WAV:
  1048.     case CODEC_ID_ADPCM_MS:

libavcodec/utils.c:1047:5: Switch condition is false. Skipping switch case
  1045.     case CODEC_ID_ADPCM_SBPRO_4:
  1046.     case CODEC_ID_ADPCM_CT:
  1047.     case CODEC_ID_ADPCM_IMA_WAV:
            ^
  1048.     case CODEC_ID_ADPCM_MS:
  1049.     case CODEC_ID_ADPCM_YAMAHA:

libavcodec/utils.c:1048:5: Switch condition is false. Skipping switch case
  1046.     case CODEC_ID_ADPCM_CT:
  1047.     case CODEC_ID_ADPCM_IMA_WAV:
  1048.     case CODEC_ID_ADPCM_MS:
            ^
  1049.     case CODEC_ID_ADPCM_YAMAHA:
  1050.         return 4;

libavcodec/utils.c:1049:5: Switch condition is false. Skipping switch case
  1047.     case CODEC_ID_ADPCM_IMA_WAV:
  1048.     case CODEC_ID_ADPCM_MS:
  1049.     case CODEC_ID_ADPCM_YAMAHA:
            ^
  1050.         return 4;
  1051.     case CODEC_ID_ADPCM_G722:

libavcodec/utils.c:1051:5: Switch condition is false. Skipping switch case
  1049.     case CODEC_ID_ADPCM_YAMAHA:
  1050.         return 4;
  1051.     case CODEC_ID_ADPCM_G722:
            ^
  1052.     case CODEC_ID_PCM_ALAW:
  1053.     case CODEC_ID_PCM_MULAW:

libavcodec/utils.c:1052:5: Switch condition is false. Skipping switch case
  1050.         return 4;
  1051.     case CODEC_ID_ADPCM_G722:
  1052.     case CODEC_ID_PCM_ALAW:
            ^
  1053.     case CODEC_ID_PCM_MULAW:
  1054.     case CODEC_ID_PCM_S8:

libavcodec/utils.c:1053:5: Switch condition is false. Skipping switch case
  1051.     case CODEC_ID_ADPCM_G722:
  1052.     case CODEC_ID_PCM_ALAW:
  1053.     case CODEC_ID_PCM_MULAW:
            ^
  1054.     case CODEC_ID_PCM_S8:
  1055.     case CODEC_ID_PCM_U8:

libavcodec/utils.c:1054:5: Switch condition is false. Skipping switch case
  1052.     case CODEC_ID_PCM_ALAW:
  1053.     case CODEC_ID_PCM_MULAW:
  1054.     case CODEC_ID_PCM_S8:
            ^
  1055.     case CODEC_ID_PCM_U8:
  1056.     case CODEC_ID_PCM_ZORK:

libavcodec/utils.c:1055:5: Switch condition is false. Skipping switch case
  1053.     case CODEC_ID_PCM_MULAW:
  1054.     case CODEC_ID_PCM_S8:
  1055.     case CODEC_ID_PCM_U8:
            ^
  1056.     case CODEC_ID_PCM_ZORK:
  1057.         return 8;

libavcodec/utils.c:1056:5: Switch condition is false. Skipping switch case
  1054.     case CODEC_ID_PCM_S8:
  1055.     case CODEC_ID_PCM_U8:
  1056.     case CODEC_ID_PCM_ZORK:
            ^
  1057.         return 8;
  1058.     case CODEC_ID_PCM_S16BE:

libavcodec/utils.c:1058:5: Switch condition is false. Skipping switch case
  1056.     case CODEC_ID_PCM_ZORK:
  1057.         return 8;
  1058.     case CODEC_ID_PCM_S16BE:
            ^
  1059.     case CODEC_ID_PCM_S16LE:
  1060.     case CODEC_ID_PCM_S16LE_PLANAR:

libavcodec/utils.c:1059:5: Switch condition is false. Skipping switch case
  1057.         return 8;
  1058.     case CODEC_ID_PCM_S16BE:
  1059.     case CODEC_ID_PCM_S16LE:
            ^
  1060.     case CODEC_ID_PCM_S16LE_PLANAR:
  1061.     case CODEC_ID_PCM_U16BE:

libavcodec/utils.c:1060:5: Switch condition is false. Skipping switch case
  1058.     case CODEC_ID_PCM_S16BE:
  1059.     case CODEC_ID_PCM_S16LE:
  1060.     case CODEC_ID_PCM_S16LE_PLANAR:
            ^
  1061.     case CODEC_ID_PCM_U16BE:
  1062.     case CODEC_ID_PCM_U16LE:

libavcodec/utils.c:1061:5: Switch condition is false. Skipping switch case
  1059.     case CODEC_ID_PCM_S16LE:
  1060.     case CODEC_ID_PCM_S16LE_PLANAR:
  1061.     case CODEC_ID_PCM_U16BE:
            ^
  1062.     case CODEC_ID_PCM_U16LE:
  1063.         return 16;

libavcodec/utils.c:1062:5: Switch condition is false. Skipping switch case
  1060.     case CODEC_ID_PCM_S16LE_PLANAR:
  1061.     case CODEC_ID_PCM_U16BE:
  1062.     case CODEC_ID_PCM_U16LE:
            ^
  1063.         return 16;
  1064.     case CODEC_ID_PCM_S24DAUD:

libavcodec/utils.c:1064:5: Switch condition is false. Skipping switch case
  1062.     case CODEC_ID_PCM_U16LE:
  1063.         return 16;
  1064.     case CODEC_ID_PCM_S24DAUD:
            ^
  1065.     case CODEC_ID_PCM_S24BE:
  1066.     case CODEC_ID_PCM_S24LE:

libavcodec/utils.c:1065:5: Switch condition is false. Skipping switch case
  1063.         return 16;
  1064.     case CODEC_ID_PCM_S24DAUD:
  1065.     case CODEC_ID_PCM_S24BE:
            ^
  1066.     case CODEC_ID_PCM_S24LE:
  1067.     case CODEC_ID_PCM_U24BE:

libavcodec/utils.c:1066:5: Switch condition is false. Skipping switch case
  1064.     case CODEC_ID_PCM_S24DAUD:
  1065.     case CODEC_ID_PCM_S24BE:
  1066.     case CODEC_ID_PCM_S24LE:
            ^
  1067.     case CODEC_ID_PCM_U24BE:
  1068.     case CODEC_ID_PCM_U24LE:

libavcodec/utils.c:1067:5: Switch condition is false. Skipping switch case
  1065.     case CODEC_ID_PCM_S24BE:
  1066.     case CODEC_ID_PCM_S24LE:
  1067.     case CODEC_ID_PCM_U24BE:
            ^
  1068.     case CODEC_ID_PCM_U24LE:
  1069.         return 24;

libavcodec/utils.c:1068:5: Switch condition is false. Skipping switch case
  1066.     case CODEC_ID_PCM_S24LE:
  1067.     case CODEC_ID_PCM_U24BE:
  1068.     case CODEC_ID_PCM_U24LE:
            ^
  1069.         return 24;
  1070.     case CODEC_ID_PCM_S32BE:

libavcodec/utils.c:1070:5: Switch condition is false. Skipping switch case
  1068.     case CODEC_ID_PCM_U24LE:
  1069.         return 24;
  1070.     case CODEC_ID_PCM_S32BE:
            ^
  1071.     case CODEC_ID_PCM_S32LE:
  1072.     case CODEC_ID_PCM_U32BE:

libavcodec/utils.c:1071:5: Switch condition is false. Skipping switch case
  1069.         return 24;
  1070.     case CODEC_ID_PCM_S32BE:
  1071.     case CODEC_ID_PCM_S32LE:
            ^
  1072.     case CODEC_ID_PCM_U32BE:
  1073.     case CODEC_ID_PCM_U32LE:

libavcodec/utils.c:1072:5: Switch condition is false. Skipping switch case
  1070.     case CODEC_ID_PCM_S32BE:
  1071.     case CODEC_ID_PCM_S32LE:
  1072.     case CODEC_ID_PCM_U32BE:
            ^
  1073.     case CODEC_ID_PCM_U32LE:
  1074.     case CODEC_ID_PCM_F32BE:

libavcodec/utils.c:1073:5: Switch condition is false. Skipping switch case
  1071.     case CODEC_ID_PCM_S32LE:
  1072.     case CODEC_ID_PCM_U32BE:
  1073.     case CODEC_ID_PCM_U32LE:
            ^
  1074.     case CODEC_ID_PCM_F32BE:
  1075.     case CODEC_ID_PCM_F32LE:

libavcodec/utils.c:1074:5: Switch condition is false. Skipping switch case
  1072.     case CODEC_ID_PCM_U32BE:
  1073.     case CODEC_ID_PCM_U32LE:
  1074.     case CODEC_ID_PCM_F32BE:
            ^
  1075.     case CODEC_ID_PCM_F32LE:
  1076.         return 32;

libavcodec/utils.c:1075:5: Switch condition is false. Skipping switch case
  1073.     case CODEC_ID_PCM_U32LE:
  1074.     case CODEC_ID_PCM_F32BE:
  1075.     case CODEC_ID_PCM_F32LE:
            ^
  1076.         return 32;
  1077.     case CODEC_ID_PCM_F64BE:

libavcodec/utils.c:1077:5: Switch condition is false. Skipping switch case
  1075.     case CODEC_ID_PCM_F32LE:
  1076.         return 32;
  1077.     case CODEC_ID_PCM_F64BE:
            ^
  1078.     case CODEC_ID_PCM_F64LE:
  1079.         return 64;

libavcodec/utils.c:1078:5: Switch condition is false. Skipping switch case
  1076.         return 32;
  1077.     case CODEC_ID_PCM_F64BE:
  1078.     case CODEC_ID_PCM_F64LE:
            ^
  1079.         return 64;
  1080.     default:

libavcodec/utils.c:1081:9: 
  1079.         return 64;
  1080.     default:
  1081.         return 0;
                ^
  1082.     }
  1083. }

libavcodec/utils.c:1083:1: return from a call to av_get_bits_per_sample
  1081.         return 0;
  1082.     }
  1083. }
        ^
  1084. 
  1085. #if FF_API_OLD_SAMPLE_FMT

libavcodec/pcm.c:49:5: 
47. 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
        ^
50.     avctx->coded_frame= avcodec_alloc_frame();
51.     avctx->coded_frame->key_frame= 1;

libavcodec/pcm.c:50:5: 
48.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();
        ^
51.     avctx->coded_frame->key_frame= 1;
52. 

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/pcm.c:51:5: 
49.     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
50.     avctx->coded_frame= avcodec_alloc_frame();
51.     avctx->coded_frame->key_frame= 1;
        ^
52. 
53.     return 0;
