Pavel V. Sysolyatin

@sentriz I've fork [audiotags](https://github.com/PSyton/audiotags) and add support for read embedded images for some media formats.

> To ensure future subsonic API extension and better support of those kind of files including gapless, can you already prepare the internal data to store the startingIndex and the...

> When just reading the PR comment : > > > As workaround for this — flac multitrack always streams as opus but not a raw. > > This means...

> You mix offset that are at frame level and use `-t` with second precision for the end clipping, that can not work. You need to store the endOffset and...

Most of all is dome, but found some strange things with WavePack (as ISO) and ffmpeg. Need some time to make workaround.

Looks like, the base things for reading metadata and playing works. - Reading cover arts from WavePack doesn't work. (Required some support in taglib, and maybe in ffmpeg) - Also...

Didn't test it with wav. Will look at this later