Maximum upload size reached after a few seconds when using RecordRTC

Hi,

I have noticed when recording via RecordRTC and the upload_max_filesize directive in the php.ini file is set to - for example, 2G - the recording only goes for around 10 seconds. The plugin is incorrectly parsing the value: 2G as 2 MB.

This is caused by the plugin expecting this value in the megabytes unit.

The fix here converts the value to bytes and removes the megabyte to bytes conversion.