Provide Quick Look plugin with movist rendering

[gradha]

This is a feature request related to #31.

It seems that there is no good .webm quick look playback for osx. I have Perian installed but it doesn't help, and I haven't found anything else. Do you have any idea if it would be possible to embed movist into a quick look renderer to play back .webm clips? It would be really nice if after dragging Movist to the applications folder you were able to preview video files with ffmpeg rather than quicktime.

[samiamwork]

I very much want this but unfortunately I don't know that it's possible to present movies with the quicklook plugin api. As far as I've found in my readings of the docs it's only possible to present things as images, HTML or PDFs (more or less). So I don't think giving a preview like the built-in MP4/MOV/etc one does. /BUT/ a preview could be made by showing a bunch of thumbnails, contact sheet style. It's not ideal but I suppose it's better than nothing.

If I (or someone) was really ambitious I suppose it might be possible to hack it by going the HTML route, but it sounds painful and probably impractical. The contact sheet is probably the best bet.

[gradha]

Ah, that's crap, didn't know moving images weren't possible (short of transcoding all frames and building some HTML frankenstein). I guess the only possible way to play webm files (or other) would be to provide a quicktime component plugin like maybe https://chromium.googlesource.com/webm/webmquicktime or https://www.xiph.org/quicktime/about.html. A completely different whole project.

[samiamwork]

Well the Quicktime component approach is what Perian is/was so adding webm support to Perian would be the better way to get this. I don't expect that it would be too hard but it's not something I want to mess with.