Photoshop :: File Converter

I am looking for a function that will convert my 20.000 TIF pictures (working on an grafical animation movie) to j.peg pictures. (same time its also going to be converted from 1280 x 720 to 720 to 405) Is this possible with Photoshop?

As musician I use a program called Spark, in which you can import eg a folder with aiff files in 44.1 kh and then you create a new map and all the files are converted to e.g wav 22.1 kh...well...this function I would like Photoshop to have...but i cannot find it..