MP4Client can't find any modules and exits with an error: stu@wolverine ~ $ MP4Client some.mp4 Using config file in /home/stu directory Loading modules ... Error: no modules found in /var/tmp/portage/gpac-0.4.1_pre20060122/image//usr/lib/gpac - exiting It seems it's looking in the sandbox for the modules...
Could you please try with 0.4.2-r1 ?
0.4.2-r1 works.
fixed in 0.4.2-r1 which has gone stable since