ffmpeg.c:2909: error: Null Dereference
  pointer `codec` last assigned on line 2902 could be null and is dereferenced at line 2909, column 8.

ffmpeg.c:2895:1: start of procedure find_codec_or_die()
2893. }
2894. 
2895. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
      ^
2896. {
2897.     const char *codec_string = encoder ? "encoder" : "decoder";

ffmpeg.c:2897:32: Condition is true
2895. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
2896. {
2897.     const char *codec_string = encoder ? "encoder" : "decoder";
                                     ^
2898.     AVCodec *codec;
2899. 

ffmpeg.c:2897:5: 
2895. static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
2896. {
2897.     const char *codec_string = encoder ? "encoder" : "decoder";
          ^
2898.     AVCodec *codec;
2899. 

ffmpeg.c:2900:9: Taking false branch
2898.     AVCodec *codec;
2899. 
2900.     if(!name)
              ^
2901.         return CODEC_ID_NONE;
2902.     codec = encoder ?

ffmpeg.c:2902:13: Condition is true
2900.     if(!name)
2901.         return CODEC_ID_NONE;
2902.     codec = encoder ?
                  ^
2903.         avcodec_find_encoder_by_name(name) :
2904.         avcodec_find_decoder_by_name(name);

ffmpeg.c:2902:5: 
2900.     if(!name)
2901.         return CODEC_ID_NONE;
2902.     codec = encoder ?
          ^
2903.         avcodec_find_encoder_by_name(name) :
2904.         avcodec_find_decoder_by_name(name);

ffmpeg.c:2905:9: Taking true branch
2903.         avcodec_find_encoder_by_name(name) :
2904.         avcodec_find_decoder_by_name(name);
2905.     if(!codec) {
              ^
2906.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
2907.         av_exit(1);

ffmpeg.c:2906:9: 
2904.         avcodec_find_decoder_by_name(name);
2905.     if(!codec) {
2906.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
              ^
2907.         av_exit(1);
2908.     }

ffmpeg.c:2907:9: Skipping av_exit(): empty list of specs
2905.     if(!codec) {
2906.         fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
2907.         av_exit(1);
              ^
2908.     }
2909.     if(codec->type != type) {

ffmpeg.c:2909:8: 
2907.         av_exit(1);
2908.     }
2909.     if(codec->type != type) {
             ^
2910.         fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
2911.         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}']