GIF upload fails on Heroku instances

[ashfurrow]

On my instance (mastodon.technology) served on Heroku, GIF uploading is failing.

Apr 05 15:28:32 mastodon-technology app/web.1:  [c3d523c0-16c8-46ee-8298-d4408452eb3d] method=POST path=/api/v1/media format=html controller=Api::V1::MediaController action=create status=500 error='Av::UnableToDetect: Unable to detect any supported library' duration=34.06 view=0.00 db=4.01 
Apr 05 15:28:32 mastodon-technology heroku/router:  at=info method=POST path="/api/v1/media" host=mastodon.technology request_id=c3d523c0-16c8-46ee-8298-d4408452eb3d fwd="67.245.117.122" dyno=web.1 connect=1ms service=987ms status=500 bytes=1435 protocol=https 

Judging from this SO answer my Heroku install is missing something. Any pointers would be welcome, and once I have it fixed I'll update the docs/code.

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• I searched or browsed the repo’s other issues to ensure this is not a duplicate.

[Gargron]

I think you need something like a ffmpeg or libav "buildpack" from heroku

[ashfurrow]

Thanks for the quick answer! That makes sense, though so far the additional build pack has put me over Heroku's 300MB slug limit (though just barely). I'm looking for a solution and will send a PR when I've figured it out.

[ashfurrow]

So I had an idea that instead of adding ffmpeg to the buildpack, we could add a script to download and install ffmpeg once the instance is up. So there'd be a slight delay while the instance is doing that, that GIF upload wouldn't work. But that'd be acceptable from my perspective. Maybe a script like this buildpack compile script? It's beyond my abilities at the moment but if you or @ineffyble think this approach would work, I can work on it.

[ashfurrow]

Since this is fixed as a consequence (and described in #1119) I'm going to close. Thanks again for the feedback.

[ashfurrow]

If anyone else is having trouble with slug size, check out this Heroku buildpack: https://github.com/Lostmyname/heroku-buildpack-post-build-clean

[nicolasmlv]

now there is an other solution :

heroku buildpacks:add -i 1 https://github.com/heroku/heroku-buildpack-activestorage-preview

There is some details by heroku here : https://blog.heroku.com/security-rails-active-storage in particular "the final static build weighed in around 30MB"

[swabeeh-ser]

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