This is a set of AutoIt Scripts I used to help me downsampling files in 
a bunch. A small description about each of them: 

- demux.au3 -> Will create a batch file to demux all SFD files in the 
directory (generates [name].mpv and [name].sfa). Needs demux.exe 
(included elsewhere in this pack). 

- criar.au3 -> Will create a batch file to multiplex SFD files from all 
[name].m1v and [name].sfa files from the current directory. Needs 
sfdmux.exe (included elsewhere in this pack). 

- mainconcept.au3 -> Not adequate for general use, but I'm including 
here anyway. Mainconcept encoder is not very good for batch encoding. It 
includes support to encode several videos in a row, however setting up 
individual settings for each video is a pain. Things get trickier if you 
want to try new bitrates everytime. When you save a setting to encode a 
video, Mainconcept will create a .mep file. Once you add them to batch 
encode, it will generate a .mes file. What this tool basically does is 
getting the "modelo.txt" (base .mep file), that contains tags in the 
place of certain variables that I wanted to change. Then it will create 
the new .mep files for each .mpv file found in the directory, and add 
references to all of them in a .mes file. In summary, for batch encoding 
in several bitrates, I'd just setup the values in the script file, 
execute it, open the generated .mes file in mainconcept and start 
encoding. 

WARNING: There parameters and an exception list hardcoded, you'll have 
to review all of that if you want to use it. 

- make_math.au3 is a script I made for the "How to downsample SFD" 
tutorial, and it's used for prediction of file size before encoding. 
Please refer to the tutorial to know how to use it.