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:1112:1: start of procedure av_get_bits_per_sample()
  1110. #endif
  1111. 
  1112. int av_get_bits_per_sample(enum CodecID codec_id){
        ^
  1113.     switch(codec_id){
  1114.     case CODEC_ID_ADPCM_SBPRO_2:

libavcodec/utils.c:1113:5: 
  1111. 
  1112. int av_get_bits_per_sample(enum CodecID codec_id){
  1113.     switch(codec_id){
            ^
  1114.     case CODEC_ID_ADPCM_SBPRO_2:
  1115.         return 2;

libavcodec/utils.c:1114:5: Switch condition is false. Skipping switch case
  1112. int av_get_bits_per_sample(enum CodecID codec_id){
  1113.     switch(codec_id){
  1114.     case CODEC_ID_ADPCM_SBPRO_2:
            ^
  1115.         return 2;
  1116.     case CODEC_ID_ADPCM_SBPRO_3:

libavcodec/utils.c:1116:5: Switch condition is false. Skipping switch case
  1114.     case CODEC_ID_ADPCM_SBPRO_2:
  1115.         return 2;
  1116.     case CODEC_ID_ADPCM_SBPRO_3:
            ^
  1117.         return 3;
  1118.     case CODEC_ID_ADPCM_SBPRO_4:

libavcodec/utils.c:1118:5: Switch condition is false. Skipping switch case
  1116.     case CODEC_ID_ADPCM_SBPRO_3:
  1117.         return 3;
  1118.     case CODEC_ID_ADPCM_SBPRO_4:
            ^
  1119.     case CODEC_ID_ADPCM_CT:
  1120.     case CODEC_ID_ADPCM_IMA_WAV:

libavcodec/utils.c:1119:5: Switch condition is false. Skipping switch case
  1117.         return 3;
  1118.     case CODEC_ID_ADPCM_SBPRO_4:
  1119.     case CODEC_ID_ADPCM_CT:
            ^
  1120.     case CODEC_ID_ADPCM_IMA_WAV:
  1121.     case CODEC_ID_ADPCM_MS:

libavcodec/utils.c:1120:5: Switch condition is false. Skipping switch case
  1118.     case CODEC_ID_ADPCM_SBPRO_4:
  1119.     case CODEC_ID_ADPCM_CT:
  1120.     case CODEC_ID_ADPCM_IMA_WAV:
            ^
  1121.     case CODEC_ID_ADPCM_MS:
  1122.     case CODEC_ID_ADPCM_YAMAHA:

libavcodec/utils.c:1121:5: Switch condition is false. Skipping switch case
  1119.     case CODEC_ID_ADPCM_CT:
  1120.     case CODEC_ID_ADPCM_IMA_WAV:
  1121.     case CODEC_ID_ADPCM_MS:
            ^
  1122.     case CODEC_ID_ADPCM_YAMAHA:
  1123.         return 4;

libavcodec/utils.c:1122:5: Switch condition is false. Skipping switch case
  1120.     case CODEC_ID_ADPCM_IMA_WAV:
  1121.     case CODEC_ID_ADPCM_MS:
  1122.     case CODEC_ID_ADPCM_YAMAHA:
            ^
  1123.         return 4;
  1124.     case CODEC_ID_ADPCM_G722:

libavcodec/utils.c:1124:5: Switch condition is false. Skipping switch case
  1122.     case CODEC_ID_ADPCM_YAMAHA:
  1123.         return 4;
  1124.     case CODEC_ID_ADPCM_G722:
            ^
  1125.     case CODEC_ID_PCM_ALAW:
  1126.     case CODEC_ID_PCM_MULAW:

libavcodec/utils.c:1125:5: Switch condition is false. Skipping switch case
  1123.         return 4;
  1124.     case CODEC_ID_ADPCM_G722:
  1125.     case CODEC_ID_PCM_ALAW:
            ^
  1126.     case CODEC_ID_PCM_MULAW:
  1127.     case CODEC_ID_PCM_S8:

libavcodec/utils.c:1126:5: Switch condition is false. Skipping switch case
  1124.     case CODEC_ID_ADPCM_G722:
  1125.     case CODEC_ID_PCM_ALAW:
  1126.     case CODEC_ID_PCM_MULAW:
            ^
  1127.     case CODEC_ID_PCM_S8:
  1128.     case CODEC_ID_PCM_U8:

libavcodec/utils.c:1127:5: Switch condition is false. Skipping switch case
  1125.     case CODEC_ID_PCM_ALAW:
  1126.     case CODEC_ID_PCM_MULAW:
  1127.     case CODEC_ID_PCM_S8:
            ^
  1128.     case CODEC_ID_PCM_U8:
  1129.     case CODEC_ID_PCM_ZORK:

libavcodec/utils.c:1128:5: Switch condition is false. Skipping switch case
  1126.     case CODEC_ID_PCM_MULAW:
  1127.     case CODEC_ID_PCM_S8:
  1128.     case CODEC_ID_PCM_U8:
            ^
  1129.     case CODEC_ID_PCM_ZORK:
  1130.         return 8;

libavcodec/utils.c:1129:5: Switch condition is false. Skipping switch case
  1127.     case CODEC_ID_PCM_S8:
  1128.     case CODEC_ID_PCM_U8:
  1129.     case CODEC_ID_PCM_ZORK:
            ^
  1130.         return 8;
  1131.     case CODEC_ID_PCM_S16BE:

libavcodec/utils.c:1131:5: Switch condition is false. Skipping switch case
  1129.     case CODEC_ID_PCM_ZORK:
  1130.         return 8;
  1131.     case CODEC_ID_PCM_S16BE:
            ^
  1132.     case CODEC_ID_PCM_S16LE:
  1133.     case CODEC_ID_PCM_S16LE_PLANAR:

libavcodec/utils.c:1132:5: Switch condition is false. Skipping switch case
  1130.         return 8;
  1131.     case CODEC_ID_PCM_S16BE:
  1132.     case CODEC_ID_PCM_S16LE:
            ^
  1133.     case CODEC_ID_PCM_S16LE_PLANAR:
  1134.     case CODEC_ID_PCM_U16BE:

libavcodec/utils.c:1133:5: Switch condition is false. Skipping switch case
  1131.     case CODEC_ID_PCM_S16BE:
  1132.     case CODEC_ID_PCM_S16LE:
  1133.     case CODEC_ID_PCM_S16LE_PLANAR:
            ^
  1134.     case CODEC_ID_PCM_U16BE:
  1135.     case CODEC_ID_PCM_U16LE:

libavcodec/utils.c:1134:5: Switch condition is false. Skipping switch case
  1132.     case CODEC_ID_PCM_S16LE:
  1133.     case CODEC_ID_PCM_S16LE_PLANAR:
  1134.     case CODEC_ID_PCM_U16BE:
            ^
  1135.     case CODEC_ID_PCM_U16LE:
  1136.         return 16;

libavcodec/utils.c:1135:5: Switch condition is false. Skipping switch case
  1133.     case CODEC_ID_PCM_S16LE_PLANAR:
  1134.     case CODEC_ID_PCM_U16BE:
  1135.     case CODEC_ID_PCM_U16LE:
            ^
  1136.         return 16;
  1137.     case CODEC_ID_PCM_S24DAUD:

libavcodec/utils.c:1137:5: Switch condition is false. Skipping switch case
  1135.     case CODEC_ID_PCM_U16LE:
  1136.         return 16;
  1137.     case CODEC_ID_PCM_S24DAUD:
            ^
  1138.     case CODEC_ID_PCM_S24BE:
  1139.     case CODEC_ID_PCM_S24LE:

libavcodec/utils.c:1138:5: Switch condition is false. Skipping switch case
  1136.         return 16;
  1137.     case CODEC_ID_PCM_S24DAUD:
  1138.     case CODEC_ID_PCM_S24BE:
            ^
  1139.     case CODEC_ID_PCM_S24LE:
  1140.     case CODEC_ID_PCM_U24BE:

libavcodec/utils.c:1139:5: Switch condition is false. Skipping switch case
  1137.     case CODEC_ID_PCM_S24DAUD:
  1138.     case CODEC_ID_PCM_S24BE:
  1139.     case CODEC_ID_PCM_S24LE:
            ^
  1140.     case CODEC_ID_PCM_U24BE:
  1141.     case CODEC_ID_PCM_U24LE:

libavcodec/utils.c:1140:5: Switch condition is false. Skipping switch case
  1138.     case CODEC_ID_PCM_S24BE:
  1139.     case CODEC_ID_PCM_S24LE:
  1140.     case CODEC_ID_PCM_U24BE:
            ^
  1141.     case CODEC_ID_PCM_U24LE:
  1142.         return 24;

libavcodec/utils.c:1141:5: Switch condition is false. Skipping switch case
  1139.     case CODEC_ID_PCM_S24LE:
  1140.     case CODEC_ID_PCM_U24BE:
  1141.     case CODEC_ID_PCM_U24LE:
            ^
  1142.         return 24;
  1143.     case CODEC_ID_PCM_S32BE:

libavcodec/utils.c:1143:5: Switch condition is false. Skipping switch case
  1141.     case CODEC_ID_PCM_U24LE:
  1142.         return 24;
  1143.     case CODEC_ID_PCM_S32BE:
            ^
  1144.     case CODEC_ID_PCM_S32LE:
  1145.     case CODEC_ID_PCM_U32BE:

libavcodec/utils.c:1144:5: Switch condition is false. Skipping switch case
  1142.         return 24;
  1143.     case CODEC_ID_PCM_S32BE:
  1144.     case CODEC_ID_PCM_S32LE:
            ^
  1145.     case CODEC_ID_PCM_U32BE:
  1146.     case CODEC_ID_PCM_U32LE:

libavcodec/utils.c:1145:5: Switch condition is false. Skipping switch case
  1143.     case CODEC_ID_PCM_S32BE:
  1144.     case CODEC_ID_PCM_S32LE:
  1145.     case CODEC_ID_PCM_U32BE:
            ^
  1146.     case CODEC_ID_PCM_U32LE:
  1147.     case CODEC_ID_PCM_F32BE:

libavcodec/utils.c:1146:5: Switch condition is false. Skipping switch case
  1144.     case CODEC_ID_PCM_S32LE:
  1145.     case CODEC_ID_PCM_U32BE:
  1146.     case CODEC_ID_PCM_U32LE:
            ^
  1147.     case CODEC_ID_PCM_F32BE:
  1148.     case CODEC_ID_PCM_F32LE:

libavcodec/utils.c:1147:5: Switch condition is false. Skipping switch case
  1145.     case CODEC_ID_PCM_U32BE:
  1146.     case CODEC_ID_PCM_U32LE:
  1147.     case CODEC_ID_PCM_F32BE:
            ^
  1148.     case CODEC_ID_PCM_F32LE:
  1149.         return 32;

libavcodec/utils.c:1148:5: Switch condition is false. Skipping switch case
  1146.     case CODEC_ID_PCM_U32LE:
  1147.     case CODEC_ID_PCM_F32BE:
  1148.     case CODEC_ID_PCM_F32LE:
            ^
  1149.         return 32;
  1150.     case CODEC_ID_PCM_F64BE:

libavcodec/utils.c:1150:5: Switch condition is false. Skipping switch case
  1148.     case CODEC_ID_PCM_F32LE:
  1149.         return 32;
  1150.     case CODEC_ID_PCM_F64BE:
            ^
  1151.     case CODEC_ID_PCM_F64LE:
  1152.         return 64;

libavcodec/utils.c:1151:5: Switch condition is false. Skipping switch case
  1149.         return 32;
  1150.     case CODEC_ID_PCM_F64BE:
  1151.     case CODEC_ID_PCM_F64LE:
            ^
  1152.         return 64;
  1153.     default:

libavcodec/utils.c:1154:9: 
  1152.         return 64;
  1153.     default:
  1154.         return 0;
                ^
  1155.     }
  1156. }

libavcodec/utils.c:1156:1: return from a call to av_get_bits_per_sample
  1154.         return 0;
  1155.     }
  1156. }
        ^
  1157. 
  1158. #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:461:1: start of procedure avcodec_alloc_frame()
  459. }
  460. 
  461. AVFrame *avcodec_alloc_frame(void){
       ^
  462.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  463. 

libavcodec/utils.c:462:5: 
  460. 
  461. AVFrame *avcodec_alloc_frame(void){
  462.     AVFrame *pic= av_malloc(sizeof(AVFrame));
           ^
  463. 
  464.     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:464:8: Taking true branch
  462.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  463. 
  464.     if(pic==NULL) return NULL;
              ^
  465. 
  466.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:464:19: 
  462.     AVFrame *pic= av_malloc(sizeof(AVFrame));
  463. 
  464.     if(pic==NULL) return NULL;
                         ^
  465. 
  466.     avcodec_get_frame_defaults(pic);

libavcodec/utils.c:469:1: return from a call to avcodec_alloc_frame
  467. 
  468.     return pic;
  469. }
       ^
  470. 
  471. #if FF_API_AVCODEC_OPEN

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;
