> Ok, upload-sources worked for me and I believe everything correct for a build.
are you sure ?
rfpkg -d -v new-sources x264-0.148-20160614-a5e06b9.tar.bz2
Creating repo object from /home/sergio/rpmfusion/new/x264
Uploading: x264-0.148-20160614-a5e06b9.tar.bz2
######################################################################## 100.0%
Status: 500 Internal Server Error
Content-type: text/plain
[Errno 30] Read-only file system: '/srv/cache/lookaside/pkgs/free/x264/tmpsCZ8_2504515ba14fed322ad89cf39f05e78ee'
Source upload succeeded. Don't forget to commit the sources file