bug#47260: Package GNU MediaGoblin as a Guix service

[Ben Sturmfels via Bug reports for GNU Guix <bug-guix@gnu.org>]

Thanks for the update Arne. This issue is specifically about Guix
packaging, so to save us losing track of your update, please post it to
the dedicated mediagoblin-devel@gnu.org thread we started a couple of
months back:

https://lists.gnu.org/archive/html/mediagoblin-devel/2021-03/msg00026.html

Thanks again,
Ben

On Wed, 05 May 2021, Arne Babenhauserheide wrote:

> Hi,
>
> I just added non-flickering video-change to the m3u-player. Attaching
> the file. I thought that could be useful for MediaGoblin. The file is
> attached.
>
>
> Best wishes,
> Arne
>
>
> Ben Sturmfels via Bug reports for GNU Guix <bug-guix@gnu.org> writes:
>
>> On Tue, 30 Mar 2021, Ben Sturmfels wrote:
>>
>>> On Fri, 19 Mar 2021, Ben Sturmfels wrote:
>>
>>>> 8. Either package RabbitMQ (probably hard) or rewrite MediaGoblin's
>>>> processing backend from Celery/RabbitMQ to RQ/Redis. Celery has been
>>>> implicated in many bugs anyway, so there may benefits to the project to
>>>> doing this anyway.
>>>
>>> I learnt that Celery has a Redis backend, so maybe we don't need to
>>> rewrite just yet.
>>
>> It turns out that MediaGoblin's Celery-based media processing backend
>> work out of the box by simply configuring:
>>
>>   [celery]
>>   BROKER_URL = "redis://"
>>
>> (There seems to be an unrelated bug where media is marked as failed after
>> restarting Celery, possibly tied to sqlite. We've had reports of this
>> with a RabbitMQ broker too though.)
>>
>>
>> This means our shorter to-do list is now:
>>
>> 1. Upstream our new python-soundfile Guix package from guix-env.scm when
>> core-updates is merged.
>>
>> 2. Upstream our upgraded python-wtforms package.
>>
>> 6. Convert MediaGoblin's jQuery-based JavaScript to use vanilla JS.
>> Video and audio are essentially functional without the NPM installed
>> players. Some later refinements perhaps.
>>
>> 4. Package MediaGoblin itself. The build process is ./configure/make
>> which is a bit weird for a Python project.
>>
>> 5. Get a basic Guix service working, with sqlite3 and without the
>> offloaded media transcoding currently using Celery task queue with a
>> Redis broker.
>>
>> 7. Work out why H264 support is missing.
>>
>> 8. Figure out how to deal with translations.
>>
>> 9. Add a PostgreSQL database to the Guix service instead of sqlite3.
>>
>> Regards,
>> Ben