504 Gateway Time-out

[irene]

Thank you Vlado, very much for your help.
Sorry for bothering you. I get a '504 Gateway Time-out' error when uploading a 
file to mediagoblin.

The web stops working. It only works again after transcoding the video.

My config uwsgi.ini:

[uwsgi]
master=true
plugin=python
uid=mediagoblin
gid=mediagoblin
socket=/tmp/mg.uwsgi.sock
virtualenv=/srv/mediagoblin.local/mediagoblin
chdir=/srv/mediagoblin.local/mediagoblin
ini-paste=/srv/mediagoblin.local/mediagoblin/paste_local.ini
logto=/srv/mediagoblin.local/mediagoblin/mg.log

My nginx config:

https://paste.debian.net/plain/1129840

Thanks for your attention