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

[Clayton Macleod]

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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> >
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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?