/** * Look for an option in an object. Consider only options which * have all
the specified flags set. * * @param[in] obj A pointer to a struct whose first
element is a * pointer to an AVClass. *
Alternatively a double pointer to an AVClass, if *
AV_OPT_SEARCH_FAKE_OBJ search flag is set. * @param[in] name The name of the
option to look for. * @param[in] unit When searching for named constants, name
of the unit * it belongs to. * @param opt_flags Find only
options with all the specified flags set (AV_OPT_FLAG). * @param search_flags A
combination of AV_OPT_SEARCH_*. * * @return A pointer to the option found, or
NULL if no option * was found. * * @note Options found with
AV_OPT_SEARCH_CHILDREN flag may not be settable * directly with
av_set_string3(). Use special calls which take an options * AVDictionary (e.g.
avformat_open_input()) to set options found with this * flag. */const AVOption
*av_opt_find(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags);
I don't get the unit and opt_flags parameter, let's say I want to get width
from an ACCodecContext, how do I do it?
const AVOption *options = av_opt_find(codecCtx, option, NULL, NULL, NULL);
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