I've made several posts about vlc failing in f24 and f25 with an old
video card and the nvidia-304 drivers. It seemed time to move on.
I now have a GT 710 fanless card from msi, which is marketed as an
upgrade for older MB video hardware; it isn't a gamers' card, but it
runs the current nvidia driver from rpmfusion.
It is working well for me in mythtv, driving both a basic vga monitor
and my HD tv (a+v) via hdmi, although at present DLNA moving-picture
quality is still rather better.
But I don't appear to have access to my old MB audio hardware, and
neither vlc nor smplayer have yet played with audio. I've found a
which looks as if it might eventually lead to an answer, but any hints
from closer to home would be welcome.