I get this error when trying to upload a working mp4 file, using current master (​https://gitorious.org/mediagoblin/mediagoblin/commit/714008693e08fc8a229fb3f7822c70c132aade7f). The same file is processed successfully on 0.7.2-dev.

2015-03-15 11:24:14,893 INFO    [mediagoblin.media_types] Info about file found, checking further
2015-03-15 11:24:14,893 INFO    [mediagoblin.media_types] checking the contents with sniffer
2015-03-15 11:24:14,893 INFO    [mediagoblin.media_types.video.processing] Sniffing mediagoblin.media_types.video
2015-03-15 11:24:14,893 INFO    [mediagoblin.media_types.tools] Discovering /tmp/tmpn4ekgH...
2015-03-15 11:24:14,898 WARNING [mediagoblin.media_types.video.processing] GStreamer: gst-stream-error-quark: This file is incomplete and cannot be played. (9)
2015-03-15 11:24:14,898 INFO    [mediagoblin.media_types] sniffer says it will not accept the file
2015-03-15 11:24:14,899 DEBUG   [mediagoblin.media_types] GStreamer: gst-stream-error-quark: This file is incomplete and cannot be played. (9)

The logs of the monthly meetings are unavailable, the server responds with a “502 Bad Gateway” error.

• ​http://mediagoblin.org/irclogs/
• ​http://mediagoblin.org/irclogs/irc_meeting-2014-05-03.txt

media_types/__init__.py:109:
    if filename.find('.') > 0:

should be: if filename.find('.') >= 0:

Because otherwise files of the form "./blah.mp4" don't work, which happens with the localfiles plugin.