Format string variables in the video snapshot prefix do not expand or are not being parsed
Since upgrading from 2.0.8, the format string variables described at https://wiki.videolan.org/Documentation:Snapshots/ and https://wiki.videolan.org/Documentation:Play_HowTo/Format_String/ no longer work; they do not expand into the data they are supposed to hold.
Example: Previously, if using a snapshot prefix such as "$N $T_-", taking a screenshot 4 seconds into a video named "coolvideo.mp4" would produce a snapshot with the filename "coolvideo.mp4 00_00_04-_2013-11-20-00h02m02s229".
Under 2.1.1, using the same snapshot prefix results in the filename "$N $T_-_2013-11-20-00h02m02s229".
I hope I have been clear in describing the problem.