AVCodec ff_libx264_encoder = {
    .name             = "libx264",
    .long_name        = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_H264,
    .priv_data_size   = sizeof(X264Context),
    .init             = X264_init,
    .encode2          = X264_frame,
    .close            = X264_close,
    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
    .priv_class       = &x264_class,
    .defaults         = x264_defaults,
    .init_static_data = X264_init_static,
    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
                        FF_CODEC_CAP_INIT_CLEANUP,
};

typedef struct AVCodec {

    const char *name;
    const char *long_name;
    enum AVMediaType type;
    enum AVCodecID id;

    int capabilities;
    const AVRational *supported_framerates; 
    const enum AVPixelFormat *pix_fmts;     
    const int *supported_samplerates;       
    const enum AVSampleFormat *sample_fmts; 
    const uint64_t *channel_layouts;        
    uint8_t max_lowres;                    
    const AVClass *priv_class;             
    const AVProfile *profiles;             

    int priv_data_size;
    struct AVCodec *next;

    int (*init_thread_copy)(AVCodecContext *);

    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);

    const AVCodecDefault *defaults;
    void (*init_static_data)(struct AVCodec *codec);

    int (*init)(AVCodecContext *);
    int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
                      const struct AVSubtitle *sub);
    int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
                   int *got_packet_ptr);
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
    int (*close)(AVCodecContext *);
    int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame);
    int (*receive_packet)(AVCodecContext *avctx, AVPacket *avpkt);
    int (*receive_frame)(AVCodecContext *avctx, AVFrame *frame);
    void (*flush)(AVCodecContext *);
    int caps_internal;
    const char *bsfs;
} AVCodec;

{
        .id        = AV_CODEC_ID_X666,
        .type      = AVMEDIA_TYPE_VIDEO,
        .name      = " libx666",
        .long_name = NULL_IF_CONFIG_SMALL("hello libx666")
    .props     = AV_CODEC_PROP_LOSSY | AV_CODEC_PROP_LOSSLESS | AV_CODEC_PROP_REORDER,
},