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From "Oliver Heger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TIKA-991) Mp3Parser cannot extract the duration of an audio file
Date Wed, 06 Feb 2013 20:57:13 GMT

    [ https://issues.apache.org/jira/browse/TIKA-991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572814#comment-13572814
] 

Oliver Heger commented on TIKA-991:
-----------------------------------

Thanks for reviewing and committing!

In the meanwhile, I used this code in one of my projects and found one more issue related
to the {{TailStream}} class: Under certain circumstances the code can enter an endless loop.
I am going to attach a patch with a corresponding fix soon.
                
> Mp3Parser cannot extract the duration of an audio file
> ------------------------------------------------------
>
>                 Key: TIKA-991
>                 URL: https://issues.apache.org/jira/browse/TIKA-991
>             Project: Tika
>          Issue Type: Improvement
>          Components: parser
>    Affects Versions: 1.2
>            Reporter: Oliver Heger
>              Labels: patch
>         Attachments: tika-991_2.patch
>
>
> The duration of an MP3 file is an important information. Currently, {{Mp3Parser}} is
not able to extract this data from a file.
> Unfortunately, it is not easy to implement this functionality with the current design
of the {{Mp3Parser}} class. In order to obtain the duration, all audio frames have to be read,
and their durations have to be summed up. Currently, only the beginning (the ID3v2 tags) and
the end (lyrics and ID3v1) are evaluated. Processing the whole file would have additional
benefits, e.g. MP3s with variable bit rates could be detected.

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