摘要：
/** * Convert valid timing fields (timestamps / durations) in a packet from one * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) 阅读全文
摘要：
/** * @defgroup opt_set_funcs Option setting functions * @{ * Those functions set the field of obj with the given name to value. * * @param[in] obj A 阅读全文