Yum will not update because it needs avidemux(x86-64) = 2.6.4-3.fc18 to complete the updates. I am running 32 bit Fedora 18.
Same issue here. I looked around how to find out the direct contact details for the maintainer of the Fedora packages of Avidemux at RPMFusion but failed, if this is the wrong place to report please someone give a pointer to the correct direction.
Anyway the issue is that starting with package version 2.6.4-3 avidemux-help (a noarch package!) is requiring avidemux x86-64 which of course is not available when wanting to install the avidemux x86-32 packages, making installs and updates of said 32bit packages always fail.
Try filing a bug report using RPMfusion's bugzilla at https://bugzilla.rpmfusion.org/ .
Thank you. This is the new bug report (FYI hfb): https://bugzilla.rpmfusion.org/show_bug.cgi?id=2848
Appears to have been reported plenty times, solution appears to be on the way: https://bugzilla.rpmfusion.org/show_bug.cgi?id=2840
Such a "popular" bug. ;D