mp3 metadata inconsistency

[dmorilha]

Hello guys,

First of all, I would like to congratulates you by the excelent project which LibExtractor is. I am developing a python script which iterates over lots of files getting all metadata which is possible. Among all possibilities I found LibExtractor as the best choice once it is great in performance and accepts a widely number of different formats. Just Awesome.

Apart from I noticed a inconsistency in mp3 metadata regarding format field. For many files I'm getting 96kbps bitrate but when on iTunes and Winamp they are being shown as 128kbps. I'm not sure why this is occurring and I'm just reporting this bug hoping it could be fixed in a future release. By the way I use the last available version 0.5.20b and also tried the online report. On both I got the same 96kbps bitrate.

Thank you a lot,
Regards,
--
Daniel Morilha (dmorilha@...)
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[Christian Grothoff]

On Saturday 12 July 2008 01:06:45 pm Daniel Morilha wrote:

> Hello guys,
>
> First of all, I would like to congratulates you by the excelent project
> which LibExtractor is. I am developing a python script which iterates over
> lots of files getting all metadata which is possible. Among all
> possibilities I found LibExtractor as the best choice once it is great in
> performance and accepts a widely number of different formats. Just Awesome.
>
> Apart from I noticed a inconsistency in mp3 metadata regarding format
> field. For many files I'm getting 96kbps bitrate but when on iTunes and
> Winamp they are being shown as 128kbps. I'm not sure why this is occurring
> and I'm just reporting this bug hoping it could be fixed in a future
> release. By the way I use the last available version 0.5.20b and also tried
> the online report. On both I got the same 96kbps bitrate.

I'm not sure what online report you are talking about, I cannot see anything
on your bugtracking system at https://gnunet.org/mantis/.

Now, I've tried a few files that I had and they all show as 128 kbps.  Could
you either e-mail me a testfile (or upload it to Mantis) so that I can
investigate what the file *actually* is and where we maybe wrong in the
interpretation of the format (or maybe itunes/winamp are wrong, but that is
less likely).

Thanks!

Christian


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[Heikki Lindholm]

Christian Grothoff kirjoitti:

> On Saturday 12 July 2008 01:06:45 pm Daniel Morilha wrote:
>
>>Hello guys,
>>
>>First of all, I would like to congratulates you by the excelent project
>>which LibExtractor is. I am developing a python script which iterates over
>>lots of files getting all metadata which is possible. Among all
>>possibilities I found LibExtractor as the best choice once it is great in
>>performance and accepts a widely number of different formats. Just Awesome.
>>
>>Apart from I noticed a inconsistency in mp3 metadata regarding format
>>field. For many files I'm getting 96kbps bitrate but when on iTunes and
>>Winamp they are being shown as 128kbps. I'm not sure why this is occurring
>>and I'm just reporting this bug hoping it could be fixed in a future
>>release. By the way I use the last available version 0.5.20b and also tried
>>the online report. On both I got the same 96kbps bitrate.
>
>
> I'm not sure what online report you are talking about, I cannot see anything
> on your bugtracking system at https://gnunet.org/mantis/.
>
> Now, I've tried a few files that I had and they all show as 128 kbps.  Could
> you either e-mail me a testfile (or upload it to Mantis) so that I can
> investigate what the file *actually* is and where we maybe wrong in the
> interpretation of the format (or maybe itunes/winamp are wrong, but that is
> less likely).

I have several files, which give wrong results. I can take a look at the
problem. Christian, was the bitstream parser copied from somewhere or
done "by the spec"?

-- Heikki Lindholm


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[Christian Grothoff]

On Sunday 13 July 2008 03:49:00 am Heikki Lindholm wrote:
> I have several files, which give wrong results. I can take a look at the
> problem. Christian, was the bitstream parser copied from somewhere or
> done "by the spec"?

Assuming you're talking about mp3extractor.c, it was largely done by the spec
(which I believe is in the doc/ directory) but some of it came from avinfo.  
In generally, read the comments on top of the file and in AUTHORS to see if
code was copied from somewhere else.

Christian


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[Christian Grothoff]

Heikki fixed some issues in the mp3 extractor.  The fixes are part of the just
release LE 0.5.20c.  I hope this addresses your particular problem as well.

Christian

On Saturday 12 July 2008 01:06:45 pm Daniel Morilha wrote:

> Hello guys,
>
> First of all, I would like to congratulates you by the excelent project
> which LibExtractor is. I am developing a python script which iterates over
> lots of files getting all metadata which is possible. Among all
> possibilities I found LibExtractor as the best choice once it is great in
> performance and accepts a widely number of different formats. Just Awesome.
>
> Apart from I noticed a inconsistency in mp3 metadata regarding format
> field. For many files I'm getting 96kbps bitrate but when on iTunes and
> Winamp they are being shown as 128kbps. I'm not sure why this is occurring
> and I'm just reporting this bug hoping it could be fixed in a future
> release. By the way I use the last available version 0.5.20b and also tried
> the online report. On both I got the same 96kbps bitrate.
>
> Thank you a lot,
> Regards,

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[dmorilha]

I will try this new version and report if find anything else.

Thank you very much, guys!

On Sun, Jul 13, 2008 at 11:38 PM, Christian Grothoff <christian@...> wrote:

Heikki fixed some issues in the mp3 extractor.  The fixes are part of the just
release LE 0.5.20c.  I hope this addresses your particular problem as well.

Christian

On Saturday 12 July 2008 01:06:45 pm Daniel Morilha wrote:

> Hello guys,
>
> First of all, I would like to congratulates you by the excelent project
> which LibExtractor is. I am developing a python script which iterates over
> lots of files getting all metadata which is possible. Among all
> possibilities I found LibExtractor as the best choice once it is great in
> performance and accepts a widely number of different formats. Just Awesome.
>
> Apart from I noticed a inconsistency in mp3 metadata regarding format
> field. For many files I'm getting 96kbps bitrate but when on iTunes and
> Winamp they are being shown as 128kbps. I'm not sure why this is occurring
> and I'm just reporting this bug hoping it could be fixed in a future
> release. By the way I use the last available version 0.5.20b and also tried
> the online report. On both I got the same 96kbps bitrate.
>
> Thank you a lot,
> Regards,

--
Daniel Morilha (dmorilha@...)
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