Description of problem:
Opened a folder containing videos in nautilus 
SELinux is preventing /usr/libexec/gstreamer-1.0/gst-plugin-scanner from 'execute' accesses on the file /home/ankur/ros_catkin_ws/install_isolated/lib/libopencv_calib3d.so.2.4.4.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that gst-plugin-scanner should be allowed execute access on the libopencv_calib3d.so.2.4.4 file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep gst-plugin-scan /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:user_home_t:s0
Target Objects                /home/ankur/ros_catkin_ws/install_isolated/lib/lib
                              opencv_calib3d.so.2.4.4 [ file ]
Source                        gst-plugin-scan
Source Path                   /usr/libexec/gstreamer-1.0/gst-plugin-scanner
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           gstreamer1-1.0.6-1.fc18.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.11.1-87.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.8.4-202.fc18.x86_64 #1 SMP Thu
                              Mar 21 17:02:20 UTC 2013 x86_64 x86_64
Alert Count                   2
First Seen                    2013-03-26 12:35:25 EST
Last Seen                     2013-03-26 12:35:25 EST
Local ID                      fc58de8c-49ae-4f64-8e6d-a52155129f93

Raw Audit Messages
type=AVC msg=audit(1364261725.331:1752): avc:  denied  { execute } for  pid=22071 comm="gst-plugin-scan" path="/home/ankur/ros_catkin_ws/install_isolated/lib/libopencv_calib3d.so.2.4.4" dev="sda5" ino=406592 scontext=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file


type=SYSCALL msg=audit(1364261725.331:1752): arch=x86_64 syscall=mmap success=no exit=EACCES a0=0 a1=29fe90 a2=5 a3=802 items=0 ppid=22058 pid=22071 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 ses=2 tty=(none) comm=gst-plugin-scan exe=/usr/libexec/gstreamer-1.0/gst-plugin-scanner subj=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 key=(null)

Hash: gst-plugin-scan,thumb_t,user_home_t,file,execute

audit2allow

#============= thumb_t ==============
allow thumb_t user_home_t:file execute;

audit2allow -R
require {
	type thumb_t;
}

#============= thumb_t ==============
userdom_mmap_user_home_content_files(thumb_t)


Additional info:
hashmarkername: setroubleshoot
kernel:         3.8.4-202.fc18.x86_64
type:           libreport