ffmpeg.c:2806: error: Null Dereference
  pointer `codec` last assigned on line 2799 could be null and is dereferenced at line 2806, column 8.

ffmpeg.c:2792:1: start of procedure find_codec_or_die()
2790. }
2791. 
2792. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
      ^
2793. {
2794.     const char *codec_string = encoder ? "encoder" : "decoder";

ffmpeg.c:2794:32: Condition is true
2792. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
2793. {
2794.     const char *codec_string = encoder ? "encoder" : "decoder";
                                     ^
2795.     AVCodec *codec;
2796. 

ffmpeg.c:2794:5: 
2792. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
2793. {
2794.     const char *codec_string = encoder ? "encoder" : "decoder";
          ^
2795.     AVCodec *codec;
2796. 

ffmpeg.c:2797:9: Taking false branch
2795.     AVCodec *codec;
2796. 
2797.     if(!name)
              ^
2798.         return CODEC_ID_NONE;
2799.     codec = encoder ?

ffmpeg.c:2799:13: Condition is true
2797.     if(!name)
2798.         return CODEC_ID_NONE;
2799.     codec = encoder ?
                  ^
2800.         avcodec_find_encoder_by_name(name) :
2801.         avcodec_find_decoder_by_name(name);

ffmpeg.c:2799:5: 
2797.     if(!name)
2798.         return CODEC_ID_NONE;
2799.     codec = encoder ?
          ^
2800.         avcodec_find_encoder_by_name(name) :
2801.         avcodec_find_decoder_by_name(name);

ffmpeg.c:2802:9: Taking true branch
2800.         avcodec_find_encoder_by_name(name) :
2801.         avcodec_find_decoder_by_name(name);
2802.     if(!codec) {
              ^
2803.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
2804.         av_exit(1);

ffmpeg.c:2803:9: 
2801.         avcodec_find_decoder_by_name(name);
2802.     if(!codec) {
2803.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
              ^
2804.         av_exit(1);
2805.     }

ffmpeg.c:2804:9: Skipping av_exit(): empty list of specs
2802.     if(!codec) {
2803.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
2804.         av_exit(1);
              ^
2805.     }
2806.     if(codec->type != type) {

ffmpeg.c:2806:8: 
2804.         av_exit(1);
2805.     }
2806.     if(codec->type != type) {
             ^
2807.         fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
2808.         av_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);
        av_exit(1);
    }
    if(codec->type != type) {
        fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
        av_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        av_exit(1);\n    }\n    if(codec->type != type) {\n        fprintf(stderr, "Invalid %s type \'%s\'\\n", codec_string, name);\n        av_exit(1);\n    }\n    return codec->id;\n}']