Re: Multiple File Conversions via Batch File

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someone@xxxxxxxxxxxxxxxxxxxxxx wrote:

Hello,
I am attempting to convert multiple .wav files to the .flac format via a batch script. I know that this can be done with numerous software implementations automatically for me; however, i am interested to understand how to create a script to perform my purpose and since this function is useful, what the hey! I am rather new to batch files but would appreciate any help. TIA

My process thus far has been the following:

I edited the file type .wav via Tools>Folder Options>File Types I added an option for "Encode to Flac" and pointed this at my "flac-convert.bat %1"

Essentially this works fine; The script runs and encodes one file with ease. At this point my script was:
@ECHO OFF
C:\"Program Files\flac\bin\flac.exe -8 %1


However, when I highlighted multiple .wav files in Explorer and click my "Encode" option multiple instances of the batch file are run. I attempted to solve this with the following code:

@ECHO OFF
:LOOP
FOR %%1 IN (.) DO C:\"Program Files"\flac\bin\flac.exe -8 %%1
SHIFT
IF "%1" == "" GOTO END
GOTO LOOP
:END

When I ran this code I hit another stumbling block. The code was parsing the %1 differently than it had in my original instance where flac was run directly. The filenames contained are something like My_alto-sax_solo.wav When I ran the first script this was parsed fine and the wav file was encoded; but, when the flac.exe was run from within the FOR loop the input file is claimed to be invalid.

So my question is two part:

1)Understanding the parsing of text within a Batch File:

How does passing a command within a FOR alter the way arguments are passed to it?

and

2) Is it possible to only run one instance of the batch file via some setting within Windows?



- - - - - - - - begin screen capture WinXP Pro SP2 - - - - - - - C:\cmd>for %a in (\windows\Media\*.wav) do @echo/"C:\Program Files\flac\bin\flac.exe" -8 "%~fa"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\chimes.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\chord.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\ding.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\notify.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\recycle.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\ringin.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\ringout.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\start.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\tada.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Balloon.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Battery Critical.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Battery Low.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Critical Stop.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Default.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Ding.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Error.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Exclamation.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Hardware Fail.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Hardware Insert.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Hardware Remove.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\windows xp information bar.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Logoff Sound.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Logon Sound.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Menu Command.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Minimize.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Notify.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\windows xp pop-up blocked.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Print complete.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Recycle.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Restore.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Ringin.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Ringout.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Shutdown.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Start.wav"
"C:\Program Files\flac\bin\flac.exe" -8 "C:\WINDOWS\Media\Windows XP Startup.wav"
- - - - - - - - end screen capture WinXP Pro SP2 - - - - - - - -
(watch out for line wrap)

--
Phil Robyn
University of California, Berkeley
.

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