mp3, avi, mkv this is are third party codec . you can’t get them with fedora dvd . And you can’t install them directly, For this you have to enable third party repo/rpm fusion repo.
1. Now open your terminal as root user. For be root user give this cmnd
then give your root psword.
then copy this code
yum -y localinstall –nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
paste it into your terminal & hit enter.
it will enable your third party repo.
2. After enable third party repo give this cmnd
yum -y install gstreamer gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly libdvdread libdvdnav lsdvd libdvdcss ffmpeg ffmpeg-libs gstreamer-ffmpeg libmatroska xvidcore xine-lib xine-lib-extras-freeworld xine-plugin
Now you are ready to paly those fromats file.