Using HDPARM

resides in /etc/conf.d/hdparm

entries are:
...
...
# or, you can set hdparm options for all drives
hda_args="-A1 -d1 -u1 -c3 -X69 -m16"
hdb_args="-c3 -d1 -u1"

Where hda is for the first hard drive and hard drive b is for the second

To fix FFMPEG

Run the following command as ROOT:

sed -i 's/-ab 192 -acodec/-ab 192k -acodec/g' /usr/bin/dvd-slideshow

This changes the string from
-ab 192 -acodec

to

-ab 192k -acodec