ffmpeg數據結構-URLContext

typedef struct URLContext {
    const AVClass *av_class;    	/**< information for av_log(). Set by url_open(). */
    struct URLProtocol *prot;
    void *priv_data;
    char *filename;             		/**< specified URL */
    int flags;
    int max_packet_size;         	/**< if non zero, the stream is packetized with this max packet size */
    int is_streamed;            			/**< true if streamed (no seek possible), default = false */
    int is_connected;
    AVIOInterruptCB interrupt_callback;
    int64_t rw_timeout;         		/**< maximum time to wait for (network) read/write operation completion, in mcs */
} URLContext;