Input file read error for xxxxx.mp3

[marcosarino]

HI all,

I got this error message while running the converter stand-alone or during a CD preparation. I created this file using audacity and for a unknown reason, I receiving this generic error message for some files. I already generated a lot of files using the same method (from a WAV file) with audacity but, for some of them I can´t convert from the generated MP3 to the audio files.

The files are OK. O can play and I can open with audacity and generate new ones.

Has some idea what can be? I try some things but a I can´t discover how to solve it.

Thanks, Marcos Arino

[ChristinaS]

Hover over the file name and see what the popup information says about the mp3 file.

[marcosarino]

CristinaS,

FoA, Thanks for your reply. Ok, sorry, but, I posted the problem before, well, don´t worry.

When I select the file to be converted to de disc media, first open the "dCW Adding files to CD" pop-up. second the converter is invoked and a new pop-up is opened, but instead of the progress bar it opens a text windows with the message:

Error Whilst Converting:

Input file read error for 'C:\Documents and Settings\All Users\Desktop\Documentos compartilhados\marcos\musicas\oxun2\a re omi.mp3'

-----

The file is there, in directory. I can play with any sw and I also can open it with audacity

when I hover the cursor over the file, at explorer, I get:

Type MPEG Layer 3 Audio
Extension mp3
Length 1:03
size 987 KB
compression 1:1
bitrate 128
frequency 8000
chanel 1
chanel mode mono
level MPEG 2 Layer 3
encoded Lame 3.96
ID Tag ID3V1.0

The original file is a long WAV file which I split to few and encoded mp3 using audacity. I tested if I can use the original wav with DMC converter, and it worked, it is the original file is OK and can be converted to audio CD.

I already made this split with audacity many times, yesterday, for an unknow reason, for some files I got this error, and I can´t know why.

Is this enough?


Marcos Arino

[marcosarino]

Cristina,

Well, the problem always occurs in MONO files.

All other files wich I can convert are STEREO (128K/44100mhz). The files has the same source, a digital powerpac recorder, but when I split it generate a mono.

The others file wich was OK (conversion), has as source CD audio track, and I used the audacity to split in smaller songs, but after split it are also STEREO.

I will test if I can split as STEREO, but could it be a root cause?


Marcis

[marcosarino]

Cristina,

I tested. When I convert the MONO file to STEREO, it works. Is there a problem with MONO files?

Marcos Arino

[LtData]

The problem is that your switching both the channels and the frequency. Changing more than one thing at a time normally results in problems.

[ChristinaS]

I would suspect the problem is going from 8MHz mono mp3 directly to 44.1KHz stereo wav (or cda which implies the internal conversion to wav).


Conversions sometimes fail if too many parameters get chaged in the same step. Here you have frequency, bitrate and channels all getting changed, not to mention final file format.

Not sure if professional frequency being enabled in dMC Configuration (powerpack features) may help. I think there was somehting about this a while back but I forget what precisely.

This is a candiate for a 2 or even 3 step conversion.
1) First change the frequency, keeping everything else "as source".
2) Then change channels to 2-channel stere, and keep everyhting else from the file obtained in step 1, "as source".
3) Lastly convert the file obtained in step 2 to standard pcm wav (44.1KHz, 16-bit PCM 2-channel stereo wav) or use dCW to burn to audio cd.

However if the file is for more than, say, 50 minutes, you may run into problems with putting it all one a single audio cd, as that is limited to about 50 or 55 minutes (may be able to get a full hour, but not sure).

[marcosarino]

ltData and Cristina,

look, I didn´t change frequence. As you asked I informed the file´s data and I informed one which works.

My teste was, I took one MONO file where I got error in convertion and just wrote as a stereo file. Just it, 1 step.

I opened the mp3 MONO file with audacity, create a stereo track, copied the content of the mono track to the new stereo track, in just 1 chanel (the other is left blank) and exported this stereo track as a new mp3 file.

The new stereo file has the same characteristics of the original file (128 bits/ 8000). I compared the properties, everything is the same unless, MONO/STEREO and the Stereo has compression 1.9 to 1 and the mono has no compression 1:1.

Therefore, well, the DMC converter seens don´t work with mono mp3 mono files....

Well I also tested generating a new file from original file, but Stereo this time and with sound in the 2 chanels, also works.

Do you have any idea?


Marcos arino

[marcosarino]

..sorry..

the sequence is:

- open the mono mp3 file in audacity

- duplicate the mono track

- assign the first one to right chanel

- assign the new one tho left chanel

- use a drop down menu function to join the 2 track in a single stereo track

- export as a new mp3 file.

- right click in mouse over the file, select convert to audio.... works


it is the only thing diferent is one file is mono the other is stereo.


MA

[ChristinaS]

As we said, having to change frequency (from the original 8MHz which is what your mp3 file is to 44.1KHz which is for the full wav or cda if you like), number of channels (from mono to stereo) and bitrate (from the original 128kbps of the mp3 file to that of an uncompressed wav) does not work in one single step.

[marcosarino]

Cristina,

Thanks for your reply.

You didn´t understand the problem or the solution.

Pay attention.

1. The file where I get error is a MONO file.

2. Therefore I didn´t change nothing. I received the error with the file as is.

3. The original file is also MONO, ok, MONO. It is a MONO wav file, because it was generated in a MONO digital recorder.

4. When I split the long file and I generate smaller MP3 files, this mp3 files are also MONO, by the way, with same frequency, but, lets ignore the frequency information, because I don´t use it.

5. When I try to convert this MONO mp3 files, it fail. the DMC doesn´t works with this MONO files.

6. When I change this file to STEREO just adding 2 chanels and keeping the same characteristics, including frequency, it works.

7. I can convert the original MONO and long wav file.

8. Therefore:

- I never change frequency or bitrate.

- When I change MONO to STEREO it is to SOLVE the problem.

About your suggestions:

As we said, having to change frequency (from the original 8MHz which is what your mp3 file is to 44.1KHz which is for the full wav or cda if you like),

*** The MP3 file keeps the same 8Mhz freq. I don´t change it.

number of channels (from mono to stereo)

*** yes, when I change the number os chanels it SOLVE the problem.

and bitrate (from the original 128kbps of the mp3 file to that of an uncompressed wav)

*** I don´t change it.

does not work in one single step.

*** ??? I didn´t do it.

Playing back:

- original file WAV, MONO, 8 mhz, 16 bits.

- When I convert it to MP3, MONO, 8 mhz, 16 bits - ERROR. Doesn´t works.

- When I convert i to MP3, STEREO, 8 mhz, 16 bits - WORKS.

My question: DO you know why the convertion doesn´t works for the MONO file? WHY only stereo file???

Thanks, Marcos Arino

[LtData]

It might be a problem making a mono low-frequency mp3.

Question: Will the conversion work if you convert to a stereo 8KHz 16-bit WAV and then to a mono or stereo 8KHz mp3?

[ChristinaS]

Marcosarino. I understood your situation. You did not understand my explanation.

When you have a low frequency (8000Hz) mono mp3 file which you need to convert to uncompressed stereo PCM wav at high frequency (44.1KHz) which is exactly what an audio cd track is when burned to audio cd, this cannot be done in a single step. You have to first convert your mp3 file to a 44.1KHz frequency or to stereo but not both at the same time, before you can proceed to burn it as an audio track.

The cd burner program uses dMC to prepare the file for burning an audio track. That conversion cannot happen if it involves converting all those different parameters in a single step. It's a limitation.

[marcosarino]

It might be a problem making a mono low-frequency mp3.

Question: Will the conversion work if you convert to a stereo 8KHz 16-bit WAV and then to a mono or stereo 8KHz mp3?

Data,

I am GMT-3, it is too late, at nigth I will do this test. I alredy had planned to make more tests to confirm the problem.

thks, MA

[marcosarino]

Marcosarino. I understood your situation. You did not understand my explanation.

When you have a low frequency (8000Hz) mono mp3 file which you need to convert to uncompressed stereo PCM wav at high frequency (44.1KHz) which is exactly what an audio cd track is when burned to audio cd, this cannot be done in a single step. You have to first convert your mp3 file to a 44.1KHz frequency or to stereo but not both at the same time, before you can proceed to burn it as an audio track.

The cd burner program uses dMC to prepare the file for burning an audio track. That conversion cannot happen if it involves converting all those different parameters in a single step. It's a limitation.

Cristina,

I will test it. Therefore if I convert the MONO file to 44.1Khz and submit it to convertion, as a MONO file, it will work? Thats what you are telling me?


MA

[ChristinaS]

Cristina,

I will test it. Therefore if I convert the MONO file to 44.1Khz and submit it to convertion, as a MONO file, it will work? Thats what you are telling me?


MA

Yes, indeed.

[marcosarino]

Yes, indeed.

Well, I made as you instruted:

- Convert to a MONO 44.1Khz

- Run DMC with this file to convert to audio CD - The same error as in the MONO 8K.

As the previous test are showing until, the problem is with MONO. I didn't find thorugh any test any relation with frequency.


MA

[marcosarino]

It might be a problem making a mono low-frequency mp3.

Question: Will the conversion work if you convert to a stereo 8KHz 16-bit WAV and then to a mono or stereo 8KHz mp3?


Data,

The convertion works if I convert first the MONO file to any STEREO file, but this is only for MP3 file.

In case of WAV file I can convert the MONO 8khz file directly to MP3 without errors. For make 2 steps I can do as I am doing, converting from MONO wav to stereo mp3 (1st step) and from mp3 to audio CD (2nd step).

MA

[ChristinaS]

Then you try to first convert the frequency to 44.1KHz and leave everyhtign else" as source". Next step convert to stereo and leave everyhting else as source. The last step convert mp3 to wav (or burn to audio cd ), but now both have the same frequency and channels.

I don't know what else to tell you. It's trial and error sometimes.