Hi, I have a problem in capturing screen. current libvlc_video_take_snapshot source code in git is below: libvlc_video_take_snapshot(...){ assert( psz_filepath ); vout_thread_t *p_vout = GetVout (p_mi, num); if (p_vout == NULL) return -1; /* FIXME: This is not atomic. All parameters should be passed...