ENCODER_PRESETS Table Layout for Rivendell

The ENCODER_PRESETS table holds data concerning predefined sets if
encoder settings for subsystems such as WebGet.

FIELD NAME           TYPE              REMARKS
---------------------------------------------------------------
ID                   int(10) unsigned
NAME                 varchar(64)       Unique
FORMAT               int(10) unsigned  RDSettings::Format
CHANNELS             int(10) unsigned
SAMPLE_RATE          int(10) unsigned  Samples/sec
BIT_RATE             int(10) unsigned  Bits/second
QUALITY              int(11) unsigned
NORMALIZATION_LEVEL  int(11) signed    dBFS
AUTOTRIM_LEVEL       int(11) signed    dBFS