While I do strongly disagree that the EAB GUI is the less conveniant tool to use, it still includes a command-line option:
EVE Asset Builder\tools\eab_tools.exe
C:\Users\Public\Documents\EVE Asset Builder\tools>eab_tools.exe
Welcome to EVE Asset Builder Utilities v1.3
Copyright(c) Bridgetek Pte Ltd All Rights Reserved
Usage: eab_tools <tool name> [-h] [options] [-g]
<tool name> can be one of these:
img_cvt
img_val
dxt1
video
audio
font
animation
flash
compress
fwtouch
bin2c
disassembler
To show [options], use: eab_tools <tool name> -h
To generate SampleApp, add option "-g"
Examples:
eab_tools img_cvt -i d:\flower.png -f 1 -o d:\output
eab_tools flash -n flash -o d:\output d:\astc.raw d:\video.anim
To show this help, use: eab_tools -h