I'm traveling from Venice to Austria and plan to spend 4 days in Austria. I want to take an overnight train from Venice to Salzburg, spend 1 day in Salzburg, head over to Hallstatt for 1 day, and head over to Vienna for 2 days. Is this doable or am I pushing it? What are the train options traveling within Austria?
With the present timetable, there is an overnight train, no changes, leaving you at Salzburg station at 4am. Not the most comfortable of choices; what would you be doing at 4am? Another connection, a bit more practical, changing at 11pm in Padova and arriving at 6am in Salzburg; at least by the time you reach an hotel to drop your luggage is already breakfast time, but do not expect to get a room before 1 or 2pm.
There are also a few daytime connections, mostly with bus to Villach and then train, taking about 7 hours and eating out the best part of a day.
IMHO a 1 day window in Salzburg is too short once you consider the practical limitation of actual timetables.