1 .. MediaGoblin Documentation
3 Written in 2011, 2012 by MediaGoblin contributors
5 To the extent possible under law, the author(s) have dedicated all
6 copyright and related and neighboring rights to this software to
7 the public domain worldwide. This software is distributed without
10 You should have received a copy of the CC0 Public Domain
11 Dedication along with this software. If not, see
12 <http://creativecommons.org/publicdomain/zero/1.0/>.
14 .. _media-types-chapter:
20 In the future, there will be all sorts of media types you can enable,
21 but in the meanwhile there are three additional media types: video, audio
24 First, you should probably read ":doc:`configuration`" to make sure
25 you know how to modify the mediagoblin config file.
31 Media types are enabled in your mediagoblin configuration file, typically it is
32 created by copying ``mediagoblin.ini`` to ``mediagoblin_local.ini`` and then
33 applying your changes to ``mediagoblin_local.ini``. If you don't already have a
34 ``mediagoblin_local.ini``, create one in the way described.
36 Most media types have additional dependencies that you will have to install.
37 You will find descriptions on how to satisfy the requirements of each media type
40 To enable a media type, edit the ``media_types`` list in your
41 ``mediagoblin_local.ini``. For example, if your system supported image and
42 video media types, then the list would look like this::
44 media_types = mediagoblin.media_types.image, mediagoblin.media_types.video
46 How does MediaGoblin decide which media type to use for a file?
47 ===============================================================
49 MediaGoblin has two methods for finding the right media type for an uploaded
50 file. One is based on the file extension of the uploaded file; every media type
51 maintains a list of supported file extensions. The second is based on a sniffing
52 handler, where every media type may inspect the uploaded file and tell if it
55 The file-extension-based approach is used before the sniffing-based approach,
56 if the file-extension-based approach finds a match, the sniffing-based approach
57 will be skipped as it uses far more processing power.
63 To enable video, first install gstreamer and the python-gstreamer
64 bindings (as well as whatever gstremaer extensions you want,
65 good/bad/ugly). On Debianoid systems::
67 sudo apt-get install python-gst0.10 gstreamer0.10-plugins-{base,bad,good,ugly} \
71 Now you should be able to submit videos, and mediagoblin should
76 You almost certainly want to separate Celery from the normal
77 paste process or your users will probably find that their connections
78 time out as the video transcodes. To set that up, check out the
79 ":doc:`production-deployments`" section of this manual.
85 To enable audio, install the gstreamer and python-gstreamer bindings (as well
86 as whatever gstreamer plugins you want, good/bad/ugly), scipy and numpy are
87 also needed for the audio spectrograms.
88 To install these on Debianoid systems, run::
90 sudo apt-get install python-gst0.10 gstreamer0.10-plugins-{base,bad,good,ugly} \
91 gstreamer0.10-ffmpeg python-numpy python-scipy
93 The ``scikits.audiolab`` package you will install in the next step depends on the
94 ``libsndfile1-dev`` package, so we should install it.
95 On Debianoid systems, run::
97 sudo apt-get install libsndfile1-dev
100 scikits.audiolab will display a warning every time it's imported if you do
101 not compile it with alsa support. Alsa support is not necessary for the GNU
102 MediaGoblin application but if you do not wish the alsa warnings from
103 audiolab you should also install ``libasound2-dev`` before installing
106 Then install ``scikits.audiolab`` for the spectrograms::
108 ./bin/pip install scikits.audiolab
110 Add ``mediagoblin.media_types.audio`` to the ``media_types`` list in your
111 ``mediagoblin_local.ini`` and restart MediaGoblin. You should now be able to
112 upload and listen to audio files!
118 To enable ascii art support, first install the
119 `chardet <http://pypi.python.org/pypi/chardet>`_
120 library, which is necessary for creating thumbnails of ascii art::
122 ./bin/easy_install chardet
125 Next, modify (and possibly copy over from ``mediagoblin.ini``) your
126 ``mediagoblin_local.ini``. In the ``[mediagoblin]`` section, add
127 ``mediagoblin.media_types.ascii`` to the ``media_types`` list.
129 For example, if your system supported image and ascii art media types, then
130 the list would look like this::
132 media_types = mediagoblin.media_types.image, mediagoblin.media_types.ascii
134 Now any .txt file you uploaded will be processed as ascii art!