# Concating file A with A, first A is silent
**URL:** https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638
**Category:** Off-Topic
**Created:** [February 1, 2024, 1:39am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638 "2024-02-01T01:39:20Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 1:39am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/1 "2024-02-01T01:39:20Z")
So, I have a bunch of sound files, short pronunciation examples. Most of them are from _[forvo.com](http://forvo.com)_, but I have now downloaded some from another site, _[parol.martinrue.com](http://parol.martinrue.com)_.
Let's say that I have a mp3 file named _dormo_ with the pronunciation of that word.
I also have a mp3 file with 4 seconds silence, named _4sek_.
The basic idea is that I concat _dormo_ + _4sek_ + _dormo_ (again). The 4 seconds silence gives me time to say the word out load.
Those from _parol_ acts strangely when concating. The first _dormo_ is silent, the second one is not.
How is this even possible? The first and second _dormo_ is the same file!
I guess you need more information about the file but don't know what information would be of interest.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 1, 2024, 7:07am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/2 "2024-02-01T07:07:28Z")
If this is a problem concerning the payload part of a file, then MP3tag is not the tool to deal with it. MP3tag only deals with the metadata around the payload part.
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 9:29am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/3 "2024-02-01T09:29:35Z")
I don't even know what _payload part_ means, my best guess is that it would be the actual sound.
dormo as standalone is audible
dormo + 4sek + dormo The dormo first is not audible, the second one is.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 1, 2024, 9:37am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/4 "2024-02-01T09:37:31Z")
> [@MrNiceButDim](#):
>
> _payload part_ means, my best guess is that it would be the actual sound.
Yes, that is what I meant - but as files that MP3tag can tag may also include videos, I thought that "audio" would not be accurate enough.
Anyway: MP3tag does not deal with the audio part. You would have to use dedicated audio editors and see what is wrong with the file.
And once the file is fixed, you can add metadata with MP3tag.
---
### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [February 1, 2024, 9:44am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/5 "2024-02-01T09:44:47Z")
> [@MrNiceButDim](#):
>
> what _payload part_ means
You can imagine that payload part like this:
Metadata/Tags \<-\> Sound/Video/Payload part \<-\> Metadata/Tags
Mp3tag does not touch the "middle" sound/video/payload part.
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 10:30am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/6 "2024-02-01T10:30:35Z")
(By mistake, I have called the file dorma here, the actual name is dormi.)
What file do you mean could be wrong?
dormi.mp3 is OK, it has both sound and an image that I've added.
When concatenated, the very **same** dormi.mp3 has the image but not the sound in the first instance. In the second instance, it has both sound and image.
It's the same dormi.mp3 in all three cases.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 1, 2024, 10:35am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/7 "2024-02-01T10:35:03Z")
> [@MrNiceButDim](#):
>
> When concatenated, the very **same** dormi.mp3 has the image but not the sound
You do the concatenating with an audio editor, I assume.
It is that process that causes the problems. I can only guess that your audio editor does not treat already existing tags correctly and the subsequently used player skips that invalid audio part until it finds something digestible.
Please check that the audio part is OK. And that is outside the scope of functions in MP3tag.
Have a look at the tools linked in this thread:
> [@Hints for asking Support Requests](https://community.mp3tag.de/t/hints-for-asking-support-requests/56190):
>
> If you need support using Mp3tag, you can help the community members that are about to support you in finding a solution or workaround to your problem, by following these simple guidelines. Be descriptive, also in what you’ve already tried Please give a short explanation what’s not working as expected or what you’re trying to achieve. It’s best to know any details about the problem at hand and especially, what steps you’ve already tried to solve it by yourself. Helpful information also includ…
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 10:51am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/8 "2024-02-01T10:51:26Z")
No, it's done in DOS with ffmpeg.
> @echo off &setlocal
> chcp 65001
> for /f "delims=" %%i in ('dir /b /a-d \*.mp3^|findstr /vc:"4sec"') do ffmpeg -i "concat:%%~i|4sec.mp3|%%~i" -acodec copy "%%~ni4sec%%~i"
> PAUSE
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 1, 2024, 11:50am UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/9 "2024-02-01T11:50:27Z")
I cannot say a lot about ffmpeg - that would be a question in the program's support facilities.
What did the check of the files reveal?
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### Author:  [@ryerman](https://community.mp3tag.de/u/ryerman)
#### Post date: [February 1, 2024, 1:41pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/10 "2024-02-01T13:41:58Z")
> [@MrNiceButDim](#):
>
> I guess you need more information about the file but don't know what information would be of interest.
The actual files might help.
Maybe you can upload an archive containing the 2 files that cause the problem.
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 2:25pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/11 "2024-02-01T14:25:12Z")
I'm not sure what you mean _checking the files_.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 1, 2024, 2:30pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/12 "2024-02-01T14:30:19Z")
have you tried the tool mp3diags from the linked thread?
That checks your file and you get a report about any findings.
So using that tool on your concatenated file is what I mean by "check the file".
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 2:38pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/13 "2024-02-01T14:38:17Z")
No I haven't, but I will, and you will be able too as I'm about to send a zip file with the 3 mp3 files
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 2:46pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/14 "2024-02-01T14:46:51Z")
Here are the 3 files involved.
dormi — the original sound file with an image that I added myself.
4sec — the silent sound file that I created myself, it hasn't got any image.
dormi4secdormi — the resulting concatenated file where the first dormi is silent, but the second one is audible.
> **[DorrmiTimes3.zip](https://wetransfer.com/downloads/5d64dfeab38208b605c9b7eeeb57afd920240201143521/d1ad87)**
>
> 1 file sent via WeTransfer, the simplest way to send your files around the world
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [February 1, 2024, 2:56pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/15 "2024-02-01T14:56:20Z")
Again:
This is not a problem for Mp3tag.
If you look at Audacity as specialized Audio Tool you see:
There is a valid 4 second silent file.
There is a valid very short ~700ms dormi audio file.
The third one that you try to concat is not a valid mp3 file.
You should really use an Audio Tool for that, not a (overly) complicated FFMPEG command line.
Of course you could also delete the no more necessary (empty) audio track before export it to MP3.
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [February 1, 2024, 3:25pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/16 "2024-02-01T15:25:42Z")
BTW:
If I try it with:
`ffmpeg -i "concat:dormi.mp3|4sec.mp3|dormi.mp3" -acodec copy dormi4secdormi_created-with-ffmpeg.mp3`
I get this file (remove the additional `.txt` before playing)
[dormi4secdormi\_created-with-ffmpeg.mp3.txt](https://community.mp3tag.de/uploads/short-url/cnj32juQGOeUhJBPKJSTl0iyqdv.txt) (67,3 KB)
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 3:33pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/17 "2024-02-01T15:33:34Z")
Thanks for the very cool and informative Audacity gif, love it.
> The third one that you try to concat is not a valid mp3 file.
I'm not trying to concat dormi4secdormi. This file is the result of concat dormi + 4sek + dormi
There are only a handful of audio files right now, but I expect the number to grow to over a thousand, so some sort of automation is needed.
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [February 1, 2024, 3:36pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/18 "2024-02-01T15:36:29Z")
> [@MrNiceButDim](#):
>
> I'm not trying to concat dormi4secdormi. This file is the result of concat dormi + 4sek + dormi
Sorry, that was my fault.
The file you have concatenated (with the previously two valid mp3 file) is no more a valid mp3 file.
I don't know what exactly is wrong with your batch command, because if I manually do the same with your two valid mp3 files it seems to work as expected.
Please double check the above audio file `dormi4secdormi_created-with-ffmpeg.mp3`
(remove the `.txt` extension before playing it)
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### Author:  [@MrNiceButDim](https://community.mp3tag.de/u/MrNiceButDim)
#### Post date: [February 1, 2024, 3:55pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/19 "2024-02-01T15:55:04Z")
> Please double check the above audio file dormi4secdormi\_created-with-ffmpeg.mp3
> (remove the .txt extension before playing it)
I can't see it above or below, is there supposed to be a download link somewhere?
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [February 1, 2024, 4:00pm UTC](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/20 "2024-02-01T16:00:36Z")
Do you can't see this blue DL link (in the picture with a green border) in [my answer above](https://community.mp3tag.de/t/concating-file-a-with-a-first-a-is-silent/63638/16)?
repeated directly here:
[dormi4secdormi\_created-with-ffmpeg.mp3.txt](https://community.mp3tag.de/uploads/short-url/cnj32juQGOeUhJBPKJSTl0iyqdv.txt) (67,3 KB)
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