SlackBuildsOrg/multimedia/vlc

VLC media player is a free and open source media player and multi-
media framework written by the VideoLAN project. VLC is a portable
multimedia player, encoder, and streamer supporting many audio and
video codecs and file formats as well as DVDs, VCDs, and various
streaming protocols. It is able to stream over networks and to
transcode multimedia files and save them into various formats.

This SB has the following dependencies, not included in default
Slackware distribution but all available through slackbuilds.org:
a52dec, faac, faad2, ffmpeg, lame, libass, libavc1394, libdc1394,
libdca, libdvbpsi, libdvdcss, libdvdnav, libebml, libiconv, libmatroska,
libmodplug, libmpeg2, libshout, libupnp, live555, lua, musepack-tools,
portaudio, schroedinger, speex, twolame, vcdimager, x264.