Bug: Does not seem to detect ffmpeg/ffprobe actually existing

[infodox]

OS: Windows 7 Ultimate, x64 build.
Version of youtube-dl: Binary build from your page
Issue: -x option fails, due to it not detecting that ffmpeg/ffprobe are installed and in $PATH (the binaries are in C:\Windows\System32)

Log: https://gist.github.com/infodox/7151909

No idea what exactly is causing this, any ideas on fix? Also, I tried running it from source (after a pip install youtube-dl) but it simply did not work on Windows. On Arch linux pip install youtube-dl works fine, so that is a case of 'lolwindows'

[jaimeMF]

I checked it on windows and seemed to work fine, could you post the output when running youtube-dl --version?
With the last version, installing with pip will install an executable in windows, you may want to try it.

[infodox]

The following gist is the pip.log of the failure to install using pip install youtube-dl from an admin shell.

https://gist.github.com/infodox/7335255

The youtube-dl version I am currently using is 2013.10.01.1, both ffmpeg and ffplay are in the $PATH.