Which private key format is this? I have a paper wallet as an image file, the QR code of the private key gives a base64 encoded string which gives "Salted_(some binary here)" when decoded. What format is this and can I get the private key without a webcam or phone?
Probably encrypted using an OpenSSL-interoperable format. See 

https://crypto.stackexchange.com/questions/8776/what-is-u2fsdgvkx1/8777#8777

http://juliusdavies.ca/commons-ssl/pbe.html

The 8 bytes following "Salted_" should be the salt.

Example cmdline to decrypt:

echo 'U2FsdGVkX19qplb9qVDVVEYxH8wjJDGpMS+F4/2pS2c=' | openssl enc -a -d -salt -des3 -pass pass:changeit
Hello World!