I have managed to wrap VapourSynth. Just the bare minimum to get something working. It has been a good exercise to learn Nim and to start loving the language. Thank you all for your support.
The code is crappy (my code I mean), but the result really surprised me. VapourSynth aims to have compatibility with [AviSynth](http://avisynth.nl/index.php/Main_Page). I would say that [VapourSynth](http://www.vapoursynth.com/) aims to be a replacement keeping compatibility with all the filters and scripts from AviSynth. AviSynth has his own scripting language. You can see how it looks [here](https://forum.nim-lang.org/t/3299#20786). There is a **python wrapper** for VapourSynth which makes it look like (from [here](http://www.vapoursynth.com/doc/gettingstarted.html#example-script)): from vapoursynth import core video = core.ffms2.Source(source='Rule6.mkv') video = core.std.Transpose(video) video.set_output() Run then you can play it with **vspipe** and **ffmpeg** (or compress it): vspipe --y4m script.vpy - | ffmpeg -i pipe: encoded.mkv Run So, how can Nim improve from there? Well, the equivalent Nim script looks like: import src/vapoursynth Source("test/2sec.mkv").Transpose.Pipey4m Run you compile it (into myfile for example) an play it back by means of: ./myfile | mplayer -idx - Run the myfile takes just 250kb. So all this effort to get this: I almost forgot, the link to the code: [VapourSynth.nim](https://github.com/mantielero/VapourSynth.nim). Lot of work ahead.
