Function av_log_set_callback

libavutil/log.c:492–495

}

void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
{
    atomic_store_explicit(&av_log_callback, (uintptr_t)callback, memory_order_relaxed);
}

static void missing_feature_sample(int sample, void *avc, const char *msg,
                                   va_list argument_list)