mutagen VS m4b-mp3-chapters-from-cuesheets

Hey HN, I wanted to share a Docker Desktop extension that uses Mutagen (the open-source[0] file sync tool for developers) to improve bind mount performance in Docker Desktop. It allows you to create synchronized filesystem caches inside the Docker Desktop VM that can automatically replace bind mounts. This gives you ext4 filesystem performance inside the Docker Desktop VM, with low-latency synchronization to-and-from the host filesystem.

Docker themselves actually shipped this functionality in Docker Desktop back in 2020, but they decided to pivot back to virtual filesystems with gRPC FUSE and Virtiofs. While these work fairly well, there are still substantial gains to be had for workflows that are readdir(), stat(), read(), and write()-heavy. This includes things like package installs (e.g. npm and Composer), dynamic language runtimes (e.g. PHP or Node.js), and compiling code.

This new implementation is significantly more performant[1], offers a more detailed UI, and gives you the option of setting the user and group IDs for files sync'd into the VM. You can even create multiple caches of the same files with different UIDs/GIDs, allowing containers with different UIDs/GIDs to access the same files without permissions conflicts.

This extension is closed-source and requires a subscription for some functionality, but that money helps to support the corresponding open-source project.

I'd be keen to hear your feedback. There are a few minor limitations (mostly SDK limitations), but nothing too significant. The next step is probably going to be adding support for remote Docker engines, but I'd be interested to know if there are other pressing features that people would like to see.

Disclaimer: I am a Docker Captain, though this tool is not developed, sponsored, or endorsed by Docker, Inc.

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[0]: https://github.com/mutagen-io/mutagen

[1]: The Docker Desktop EULA prevents me from publishing benchmarks, but the performance difference will be the same as the difference between gRPC FUSE or Virtiofs and a "native" ext4 volume inside the VM. This will differ between hardware and virtualization frameworks. The best option is testing your own workflow.

I can't predict ultra far into the future (who can these days... :|), but Mutagen has been under active development for about 6 years now[0]. At the moment I have enough funding to work on it full-time until at least the middle of next year, though I also do Mutagen-related contracting and consulting work to support the project. Mutagen's Docker Desktop extension is going to be a freemium product designed to support the project more directly, which will hopefully allow development to continue indefinitely.

[0]: https://github.com/mutagen-io/mutagen/graphs/contributors

It's pretty bad. The Docker for Mac team tested something called Mutagen to speed things up, but then removed it again, and the difference was drastic.

Sorry, I’m not familiar with programs on Mac. I use these scripts but they are Windows only.

Prologue reads embedded chapters. If you have Windows, see here for a method to embed chapters from a cue file to mp3 or m4b.

You could also merge the chapter tracks into a single file with embedded chapters, but I think there is a chapter limit of 255 for m4b files, mp3 I’ve had issues with large chapter numbers as well but I’m unsure what the limit is. There’s a guide here on doing that https://github.com/TheMetalCenter/m4b-mp3-chapters-from-cuesheets thought it is windows only.

I use this method to change the chapters in all my audiobooks https://github.com/TheMetalCenter/m4b-mp3-chapters-from-cuesheets

I personally keep an audiobook folder on my NAS (or network drive) and manage it with MusicBee (the guide above uses mp3tag). I manually add my own metadata (guide above gives option to do manual or scrape it from audible). Then I update Plex library, which points to that directory, and adds any new books to Plex. I merge all my audio files to a single chapterized file before adding to MusicBee using https://github.com/TheMetalCenter/m4b-mp3-chapters-from-cuesheets but the guide above has an alternate way to do it.

Do you have Windows or Mac? If Windows, this is the method I use to add/edit my audiobook's chapters. It's all done from bat files with ruby and python scripts, so a little messy but it gets the job done. You'd want to do scenario 6.