Documentation: Add audio service

[ruebot]

Add a simple image manipulation web service that executes lame on any audio file that gets POSTed to it. It should respect a header such as X-Islandora-Imagemagick-Args so you can pass in command line arguments.

It should be built on the same model as hypercube.

[ruebot]

I have something pretty much ready, and can issue a pull request to resolve this issue. However, the more I think about it, I think using lame would be the wrong approach.

Rationale:

• lame is wav -> mp3 only. It does not cover flac.
• sox is good option, and allows streaming to it as well
• ffmpeg is an even better option because it can be used by both audio and video.

@Islandora-CLAW/committers let me know what y'all think at your convenience. This is post MVP, so not a super priority, and I don't want to put it on a CLAW call until we're post MVP.

[whikloj]

@ruebot you are right about lame, I think its out of copyright too 😜 .

ffmpeg is probably the way to go. We can _eventually_ have a bunch of API-X services to handle converting different file types. Also reduces the number of supporting applications we have to install.

[ruebot]

@MarcusBarnes it's the commit above that says "Create audio service." You can get to the branch from that as well.

[ruebot]

I think its out of copyright too

@whikloj are you talking about the mp3 patent that expired?

[whikloj]

@ruebot umm...yeah that's the ticket. Either way your statement about lames singularity of focus means it could be easily replaced by a better tool, IMHO.

[ruebot]

Since it came up in irc, here is the branch.

[dannylamb]

Linking to roadmap issues https://github.com/Islandora-CLAW/CLAW/issues/930 and https://github.com/Islandora-CLAW/CLAW/issues/929 for audio and video, respectively, if we go the ffmpeg route.

[dannylamb]

Resolved via https://github.com/Islandora-CLAW/Crayfish/commit/d81724ecb7485425cb763dd742baef79f42daeb5

Thx @Natkeeran!