slackbuilds/multimedia/transcode/README

transcode is a text-console utility for video stream processing.

Decoding and encoding is done by loading modules that are responsible
for feeding transcode with raw video/audio streams (import modules)
and encoding the frames (export modules). It supports elementary video
and audio frame transformations, including de-interlacing or fast
resizing of video frames and loading of external filters.

You can enable some optional (not-autodetected) features by
passing variables to the script:

FAAC=yes|no (default: no), requires faac
LIBDV=yes|no (default: no), requires libdv
LIBMPEG2=yes|no (default: no), requires libmpeg2
MJPEGTOOLS=yes|no (default: no), requires mjpegtools
QUICKTIME=yes|no (default: no), requires libquicktime
X264=yes|no (default: no), requires x264
XVID=yes|no (default: no), requires xvidcore

Note that newer versions of the stabilize and transform filters are
available as part of vid.stab and have thus been dropped from this
package.