-#if FF_API_OLD_OPEN_CALLBACKS
- /**
- * Called to open further IO contexts when needed for demuxing.
- *
- * This can be set by the user application to perform security checks on
- * the URLs before opening them.
- * The function should behave like avio_open2(), AVFormatContext is provided
- * as contextual information and to reach AVFormatContext.opaque.
- *
- * If NULL then some simple checks are used together with avio_open2().
- *
- * Must not be accessed directly from outside avformat.
- * @See av_format_set_open_cb()
- *
- * Demuxing: Set by user.
- *
- * @deprecated Use io_open and io_close.
- */
- attribute_deprecated
- int (*open_cb)(struct AVFormatContext *s, AVIOContext **p, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options);
-#endif
-