Useful Batch Files

This is a more advanced "tutorial" which is more of a cache of helpful .bat files. Comfort with use of these files is assumed.

Note: For most of the VGM Tools, you can specify an output file: tool.exe "input.vgm" "output.vgm"

all2txt

Convert all VGMs in a folder to text files.
Windows .bat	`FOR %%A IN (*.vg?) DO vgm2txt "%%A" 0 0`
Linux (bash and compatible shells)	`for f in *.vg? ; do vgm2txt "$f" 0 0 ; done`

find_start_points

Like all2txt, but is more convenient when all you need is to find the beginning trims.

.bat form:

 FOR %%A IN (*.vg*) DO vgm2txt "%%A" 0 0:03

Command line form:

 FOR %A IN (*.vg*) DO vgm2txt "%A" 0 0:03

Linux form:

 for f in *.vg? ; do vgm2txt "$f" 0 0:03 ; done

change_system (and other quick vgm_tag changers)

If you commonly need to change only the System part of many VGM tags, you can make .bats like these examples. Any of the vgm_tag short names can be used.

 FOR %A IN (*.vg*) DO vgm_tag -System:SMD "%A"
 for %f in (*.vg?) do vgm_tag -System:Arc "%f"

With simple changes, you can do the same for any field:

 for %f in (*.vg?) do vgm_tag -Creator:"Alex Kidd" "%f"

opt

Use optvgm and then vgm_cmp on all trimmed VGMs; then, use gzip on all optimized VGMs.

 for %%f in (*_trimmed.vgm) do optvgm "%%f" "%%~nf.vgz" & vgm_cmp "%%~nf.vgz" & gzip.exe "%%~nf_optimized.vgm" & ren "%%~nf_optimized.vgm.gz" "%%~nf_optimized.vgz"

clean_names_and_get_stats

Usage assumptions:

vgm_name can be reached.
The folder this is used in/on only contains VGMs meant to go in the playlist.
(For best results) The folder is named the correct name for the pack.

 echo off
 vgm_name
 dir *.vg? /b /on > "playlist.m3u"
 vgm_stat playlist.m3u > stats.txt
 for %%* in (.) do move "playlist.m3u" "%%~n*.m3u"
 pause

Note: To get track stats in the proper form, using a playlist is required.

Note: Used in a .bat file, move destroys existing files rather than ignores them, much to the dismay of DeadFish and anyone else with sense. (You can't avoid this behavior with a single simple line.) At least in this case it doesn't matter.