ffmpeg.c:3159: error: Null Dereference
  pointer `codec` last assigned on line 3152 could be null and is dereferenced at line 3159, column 8.

ffmpeg.c:3145:1: start of procedure find_codec_or_die()
3143. }
3144. 
3145. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
      ^
3146. {
3147.     const char *codec_string = encoder ? "encoder" : "decoder";

ffmpeg.c:3147:32: Condition is true
3145. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
3146. {
3147.     const char *codec_string = encoder ? "encoder" : "decoder";
                                     ^
3148.     AVCodec *codec;
3149. 

ffmpeg.c:3147:5: 
3145. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
3146. {
3147.     const char *codec_string = encoder ? "encoder" : "decoder";
          ^
3148.     AVCodec *codec;
3149. 

ffmpeg.c:3150:9: Taking false branch
3148.     AVCodec *codec;
3149. 
3150.     if(!name)
              ^
3151.         return CODEC_ID_NONE;
3152.     codec = encoder ?

ffmpeg.c:3152:13: Condition is true
3150.     if(!name)
3151.         return CODEC_ID_NONE;
3152.     codec = encoder ?
                  ^
3153.         avcodec_find_encoder_by_name(name) :
3154.         avcodec_find_decoder_by_name(name);

ffmpeg.c:3152:5: 
3150.     if(!name)
3151.         return CODEC_ID_NONE;
3152.     codec = encoder ?
          ^
3153.         avcodec_find_encoder_by_name(name) :
3154.         avcodec_find_decoder_by_name(name);

ffmpeg.c:3155:9: Taking true branch
3153.         avcodec_find_encoder_by_name(name) :
3154.         avcodec_find_decoder_by_name(name);
3155.     if(!codec) {
              ^
3156.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
3157.         ffmpeg_exit(1);

ffmpeg.c:3156:9: 
3154.         avcodec_find_decoder_by_name(name);
3155.     if(!codec) {
3156.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
              ^
3157.         ffmpeg_exit(1);
3158.     }

ffmpeg.c:3157:9: Skipping ffmpeg_exit(): empty list of specs
3155.     if(!codec) {
3156.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
3157.         ffmpeg_exit(1);
              ^
3158.     }
3159.     if(codec->type != type) {

ffmpeg.c:3159:8: 
3157.         ffmpeg_exit(1);
3158.     }
3159.     if(codec->type != type) {
             ^
3160.         fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
3161.         ffmpeg_exit(1);

static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
{
    const char *codec_string = encoder ? "encoder" : "decoder";
    AVCodec *codec;
    if(!name)
        return CODEC_ID_NONE;
    codec = encoder ?
        avcodec_find_encoder_by_name(name) :
        avcodec_find_decoder_by_name(name);
    if(!codec) {
        fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
        ffmpeg_exit(1);
    }
    if(codec->type != type) {
        fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
        ffmpeg_exit(1);
    }
    return codec->id;
}
['static enum CodecID find_codec_or_die(const char *name, int type, int encoder)\n{\n    const char *codec_string = encoder ? "encoder" : "decoder";\n    AVCodec *codec;\n    if(!name)\n        return CODEC_ID_NONE;\n    codec = encoder ?\n        avcodec_find_encoder_by_name(name) :\n        avcodec_find_decoder_by_name(name);\n    if(!codec) {\n        fprintf(stderr, "Unknown %s \'%s\'\\n", codec_string, name);\n        ffmpeg_exit(1);\n    }\n    if(codec->type != type) {\n        fprintf(stderr, "Invalid %s type \'%s\'\\n", codec_string, name);\n        ffmpeg_exit(1);\n    }\n    return codec->id;\n}']