1234 typedef struct AVFormatContext {  struct
1239     const AVClass *av_class;
1246     ff_const59 struct AVInputFormat *iformat;
1253     ff_const59 struct AVOutputFormat *oformat;
1262     void *priv_data;
1286      * Number of elements in AVFormatContext.streams.  argument
1290     unsigned int nb_streams;
1302     AVStream **streams;
1314     char filename[1024];
1330     char *url;
1339     int64_t start_time;
1349     int64_t duration;
1356     int64_t bit_rate;
1358     unsigned int packet_size;
1359     int max_delay;
1365     int flags;
1402     int64_t probesize;
1410     int64_t max_analyze_duration;
1412     const uint8_t *key;
1413     int keylen;
1415     unsigned int nb_programs;
1416     AVProgram **programs;
1422     enum AVCodecID video_codec_id;
1428     enum AVCodecID audio_codec_id;
1434     enum AVCodecID subtitle_codec_id;
1446     unsigned int max_index_size;
1452     unsigned int max_picture_buffer;
1465     unsigned int nb_chapters;
1466     AVChapter **chapters;
1476     AVDictionary *metadata;
1489     int64_t start_time_realtime;
1496     int fps_probe_size;
1503     int error_recognition;
1514     AVIOInterruptCB interrupt_callback;
1519     int debug;
1560  *   AVFormatContext.metadata accordingly  argument
1570     int max_ts_probe;
1579     int avoid_negative_ts;
1588     int ts_id;
1596     int audio_preload;
1604     int max_chunk_duration;
1612     int max_chunk_size;
1620     int use_wallclock_as_timestamps;
1627     int avio_flags;
1635     enum AVDurationEstimationMethod duration_estimation_method;
1642     int64_t skip_initial_bytes;
1649     unsigned int correct_ts_overflow;
1656     int seek2any;
1663     int flush_packets;
1672     int probe_score;
1679     int format_probesize;
1687     char *codec_whitelist;
1695     char *format_whitelist;
1701     AVFormatInternal *internal;
1709     int io_repositioned;
1717     AVCodec *video_codec;
1725     AVCodec *audio_codec;
1733     AVCodec *subtitle_codec;
1741     AVCodec *data_codec;
1748     int metadata_header_padding;
1754     void *opaque;
1759     av_format_control_message control_message_cb;
1787      * The function should behave like avio_open2(), AVFormatContext is provided  argument
1800 …int (*open_cb)(struct AVFormatContext *s, AVIOContext **p, const char *url, int flags, const AVIOI…  argument
1826      * additional internal format contexts. Thus the AVFormatContext pointer  argument
1830     int (*io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url,  argument
1836     void (*io_close)(struct AVFormatContext *s, AVIOContext *pb);  argument
1865 } AVFormatContext;  argument