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[README] Document special characters escaping (#5538)

totalwebcasting
Sergey M. 10 years ago
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@ -358,6 +358,22 @@ YouTube has switched to a new video info format in July 2011 which is not suppor
YouTube requires an additional signature since September 2012 which is not supported by old versions of youtube-dl. See [above](#how-do-i-update-youtube-dl) for how to update youtube-dl.
### Video URL contains an ampersand and I'm getting some strange output `[1] 2839` or `'v' is not recognized as an internal or external command` ###
That's actually the output from your shell. Since ampersand is one of the special shell characters it's interpreted by shell preventing you from passing the whole URL to youtube-dl. To disable your shell from interpreting the ampersands (or any other special characters) you have to either put the whole URL in quotes or escape them with a backslash (which approach will work depends on your shell).
For example if your URL is https://www.youtube.com/watch?t=48&v=e2CXaJv0cMw you should end up with following command:
```youtube-dl 'https://www.youtube.com/watch?t=48&v=e2CXaJv0cMw'```
or
```youtube-dl https://www.youtube.com/watch?t=48\&v=e2CXaJv0cMw```
For Windows you have to use the double quotes:
```youtube-dl "https://www.youtube.com/watch?t=48&v=e2CXaJv0cMw"```
### ExtractorError: Could not find JS function u'OF'
In February 2015, the new YouTube player contained a character sequence in a string that was misinterpreted by old versions of youtube-dl. See [above](#how-do-i-update-youtube-dl) for how to update youtube-dl.


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