[FFmpeg-user] Fwd: Get sample rate in mp3 files

Tue Feb 22 19:18:28 EET 2022

hi Clayton

I found your idea interesting, but I was confused on how to do it. I would
have it right after the main FOR and run:

for /f %%n in ("%%a") do ren temp.mp3      (is this command correct?)
ps. if I rename like this the originals are all with the name temp.mp3?

After the rename, should I process the files using %%n as input, and at the
end of processing, before writing the output, return the names to what they
were originally?... is that it?... because if I do that , the file with the
exclamation will return and the code will give the same error!

Another detail, how do I return the files to their original names if they
are all like temp.mp3?

I'm learning, and this is making it difficult for me to understand this
issue of renames in the files! I'm sorry and I ask for your patience with
this!

thanks
Clamarc

Em ter., 22 de fev. de 2022 às 03:54, Clayton Macleod <cherrytwist at gmail.com>
escreveu:

> How about temporarily renaming the file at the start of the loop before any
> processing happens?
>
> ren %G temporary.mp3
> processing commands on temporary.mp3
> ren temporary.mp3 %G
>
> And then just rename it back at the end of the loop, like that.
>
>
> On Mon, 21 Feb 2022 at 22:32, CMG DiGiTaL <cmarciog at gmail.com> wrote:
>
> > hi Reino,
> >
> > thanks for the clarifications...
> >
> > > FOR *%G* IN (*.mp3) DO (
> >  Please don't do this. I understand you're trying to emphasize parts of
> > code...
> >
> >    it was because I took part of the sample rate command that you sent me
> > to be able to use it in my batch file that I already had here, you
> know?...
> > I'm sorry about that!
> >
> > ...with regard to ENABLEDELAYEDEXPANSION, I put the question of this
> batch
> > LUFS here, because I already have it working in batch file with
> > ENABLEDELAYEDEXPANSION, t
> > he problem that is driving me crazy, is that as some audio files have the
> > exclamation mark in the name, using the ENABLEDELAYEDEXPANSION, the batch
> > cancels because it
> > doesn't recognize the files with the exclamation mark, so I'm trying
> > another way to make it work without using the ENABLEDELAYEDEXPANSION so
> > that I can have a batch file
> > that reads all files without giving problems.
> >
> > ps. this ENABLEDELAYEDEXPANSION problem, with the exclamation mark, is
> > killing me...
> > ...because I can't get my batch file to read all files without problems..
> > so what I'm doing is, taking the exclamation mark out of the files,
> running
> > the batch and then putting the
> > exclamation mark on the files manually!
> >
> > thanks
> > Clamarc
> >
> > Em seg., 21 de fev. de 2022 às 22:02, Reino Wijnsma <rwijnsma at xs4all.nl>
> > escreveu:
> >
> > > On 2022-02-21T08:52:44+0100, CMG DiGiTaL <cmarciog at gmail.com> wrote:
> > > > I did these commands below
> > >
> > > This has nothing to with your initial question "Get sample rate in mp3
> > > files", or even FFmpeg. This is in fact a question about CMD and Batch.
> > > I will respond to this now, but I don't believe questions like these
> are
> > > for the ffmpeg-user mailinglist.
> > >
> > > I know CMD / Batch, but to be honest I don't know enough about FFmpeg's
> > > features to know what LUFS is/does. So I can't comment on whether this
> > is a
> > > useful approach or not.
> > > I can see you're trying to parse a loudnorm log and use these values in
> > > another FFmpeg call. A rather inefficient process, calling the txt-file
> > > multiple times with FINDSTR, if you ask me. Especially because you can
> > > enter print_format=json for the loudnorm-filter.
> > >
> > > > - Can I use a command of this size directly in cmd?
> > >
> > > Sure. The amount of characters doesn't come near CMD's commandline
> buffer
> > > of 8192 bytes.
> > > But you're gonna need delayed expansion for this, so I'd say you're
> > better
> > > off creating a bat-file.
> > >
> > > > FOR *%G* IN (*.mp3) DO (
> > >
> > > Please don't do this. I understand you're trying to emphasize parts of
> > > code, but in this particular case it's not bold printed, which raises
> the
> > > question if it's part of the code or not.
> > >
> > > >   set vluf=-10.0
> > > >   set vpeak=-0.0
> > >
> > > If these are always the same value for each mp3-file, then I would've
> > > declared them before the FOR-loop.
> > >
> > > >   @for /f "delims=" *%A* IN ('ffprobe -v 0 -show_entries
> > > *stream^=bit_rate*
> > > > -of csv^=p^=0 "*%G*"')
> > >
> > > This FFprobe call shouldn't be here. It should be right before the
> final
> > > FFmpeg call.
> > >
> > > >   *ffmpeg* -i "%G" -filter_complex
> > > > "[0:a]loudnorm=I=-15:TP=-1.5:LRA=11:print_format=summary" -f null x
> > > 2>%1.txt
> > >
> > > On Linux the convention is -f null /dev/null, but on Windows it's -f
> null
> > > NUL.
> > > I would recommend naming a file "%1". Could cause lots of problems.
> > >
> > > >   echo "%II" is the Input Integrated
> > >
> > > You forgot the closing % --> %II%. Only FOR-loop variables work
> without a
> > > closing %.
> > >
> > > >   @for /f "tokens=3" %B in ('findstr /C:"Output Integrated" %1.txt')
> do
> > > > (set *OI*=%B)
> > > >   echo %OI is the Output Integrated
> > > >   @for /f "tokens=4" %B in ('findstr /C:"Output True Peak" %1.txt')
> do
> > > (set
> > > > *OTP*=%B)
> > > >   echo %OTP is the Output True Peak
> > > >   @for /f "tokens=3" %B in ('findstr /C:"Output LRA" %1.txt') do (set
> > > *OLRA*
> > > > =%B)
> > > >   echo %OLRA is the Output LRA
> > > >   @for /f "tokens=3" %B in ('findstr /C:"Output Threshold" %1.txt')
> do
> > > (set
> > > > *OT*=%B)
> > >
> > > You don't seem to be using these variables in the final FFmpeg call, so
> > > why extract them?
> > >
> > > I'd recommend this for a Batch-file:
> > >
> > > @ECHO off
> > > SET vluf=-10.0
> > > SET vpeak=-0.0
> > > SETLOCAL ENABLEDELAYEDEXPANSION
> > > FOR %%A IN (*.mp3) DO (
> > >   ffmpeg -hide_banner -i "%%A" -af
> > > "loudnorm=I=-15:TP=-1.5:LRA=11:print_format=summary" -f null NUL 2>
> > > "%%~nA.log"
> > >   @FOR /F "tokens=3" %%B IN ('FINDSTR /C:"Input Integrated"
> "%%~nA.log"')
> > > DO (SET II=%%B)
> > >   ECHO !II! is the Input Integrated
> > >   @FOR /F "tokens=4" %%B IN ('FINDSTR /C:"Input True Peak"
> "%%~nA.log"')
> > > DO (SET ITP=%%B)
> > >   ECHO !ITP! is the Input True Peak
> > >   @FOR /F "tokens=3" %%B IN ('FINDSTR /C:"Input LRA" "%%~nA.log"') DO
> > (SET
> > > ILRA=%%B)
> > >   ECHO !ILRA! is the Input LRA
> > >   @FOR /F "tokens=3" %%B IN ('FINDSTR /C:"Input Threshold"
> "%%~nA.log"')
> > > DO (SET IT=%%B)
> > >   ECHO !IT! is the Input Threshold
> > >   @FOR /F "tokens=3" %%B IN ('FINDSTR /C:"Target Offset" "%%~nA.log"')
> DO
> > > (SET TO=%%B)
> > >   ECHO !TO! is the Target Offset
> > >   FOR /F "delims=" %%B IN ('ffprobe -v 0 -show_entries stream^=bit_rate
> > > -of default^=nk^=1:nw^=1 "%%A"') DO ffmpeg -hide_banner -i "%%A" -af
> > >
> >
> "loudnorm=linear=true:I=!vluf!:LRA=11:tp=!vpeak!:measured_I=!II!:measured_LRA=!ILRA!:measured_tp=!ITP!:measured_thresh=!IT!:offset=!TO!:print_format=summary"
> > > -c:a libmp3lame -b:a %%B "..\Áudios LUFS ORI\%%~nA_LUFS_CONVERTED.mp3"
> > > )
> > > ENDLOCAL
> > >
> > > --
> > > Reino
> > >
> > > _______________________________________________
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> > >
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> >
>
>
> --
> Clayton Macleod
> If no one comes from the future to stop you from doing it, then how bad of
> a decision can it really be?
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