changed format of media bullets

[Christophe Parisse]

Dear Leonid and Brian

There is a drawback with the new format of bullets. One of the nice feature of the old format was that when using COMBO across a whole set of files, it was possible for each line that contained a bullet to play this line using F4 in the results file. This doesn't work with the new version, because the COMBO search does not create a @media line and even more, there could be more than one media in the same result file.

A solution could be to change COMBO to recreate full bullets on the fly at search time.

Christophe

-----Message d'origine-----
De : info-childes at googlegroups.com [mailto:info-childes at googlegroups.com] De la part de Brian MacWhinney
Envoyé : jeudi 12 mars 2009 00:46
À : CHILDES
Objet : changed format of media bullets


Dear Info-CHILDES,

    In response to user requests and the need to maintain better database structure, we have reworked the way in which media bullets are formatted and created in the CLAN program.  Using this new format, we have updated all the transcripts in the CHILDES and TalkBank databases that are linked to either audio or video. CLAN is still backward compatible and can play materials formatted in the old  
system, but when producing new bullets, it will use the new format.   
In the older system, each link included the media file name.  When expanded, these links or bullets had this format:

∙%snd:"CLIP"_1927_4086∙

The new format is simply:

∙1927_4086∙
In the new system, the identity of the media file is not repeated in every single bullet, but only once at the top of the file.  It is placed into a tier that has this shape:

@Media: clip.wav, audio

Here the name of the media is clip.wav and it has an audio format.   
There are two fields in the @Media header.  The first is for the media file name.  You do not need to include the extension of the media file name, but you can if you wish. Crucially, each transcript should be associated with one and only one media file.  This is necessary to provide good compatibility with programs like Elan, ANVIL, Exmaralda, and so on.  Also, to keep your project well organized it is best if the media file name matches the transcript file name.  The second field in the @Media header tells whether the media is audio, video, or missing.

If you have files with bullets in the old format, you can change them to the new format using this command:

fixbullets -n *.cha

However, you will have to enter the @Media header by hand yourself, one for each transcript that is linked to media.  If you have problems with this new format, please feel free to contact me or to post question to chibolts at googlegroups.com

-- Brian MacWhinney



  


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