URL should be escaped for shell

[dopesong]

Example:

$ youtube-dl --continue --format bestvideo --print-json --ignore-config https://www.youtube.com/watch?feature=player_embedded&v=HTLzK8eyZBA

ERROR: Did you forget to quote the URL? Remember that & is a meta character in most shells, so you want to put the URL in quotes, like youtube-dl "http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc" or simply youtube-dl BaW_jenozKc .

[dopesong]

Also errors should be improved, because I found this with this error:

Catchable fatal error: Argument 1 passed to YoutubeDl\Mapper\Mapper::map() must be of the type array, null given, called in /home/test/converter/vendor/norkunas/youtube-dl-php/src/YoutubeDl.php on line 198 and defined in /home/test/converter/vendor/norkunas/youtube-dl-php/src/Mapper/Mapper.php on line 43

No exception for such youtube-dl response.

[norkunas]

Thanks @dopesong.

[norkunas]

@dopesong i tried to execute your provided url without escaping and I got Symfony\Component\Process\Exception\ProcessFailedException as expected.

[dopesong]

That's strange. I got this by running proccess in symfony console on CentOS release 6.6 (Final). Also youtube-dl version 2015.05.20.

I think after crash there was no exit code or it was wrong.