Old 13th March 2011, 07:32   #1
idobi
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Transcoder & ID3 info

I've had a problem with how the transcoder has been handling ID3 info for a couple months and it's been annoying the hell out of me. I've finally tracked down the problem.

sc_trans has been reporting that MP3 with apparently valid ID3v2.4 had "Very badly formed data", and falls back to sending the filename as the Metadata string.

Tonight I finally tracked down the problem. MP3 that once had track information in ID3v1, and have since had the ID3v1 tag removed populate the Comment data for ID3v2.x with random string like:

000138C5 00000000 00000000 00000000

Not all ID3 tag editors see this information - iTunes doesn't. They show the comment field as blank (as they should be). I finally loaded the tracks in MP3 Rage (Mac app) and the bad comment data showed up. Deleting the field - sometimes you have to do it several time as the string overflow the field, and a single scrub doesn't get rid of all the data - finally fixed this headache.

Just thought this info might be useful for others. Also, perhaps the ID3v2 parser for sc_trans should be a little more tolerant.

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Old 13th March 2011, 19:28   #2
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can you send me a small example mp3 which has this tag please and will see what i can do though i'm hoping some other things i've been doing with the tag reading might already have resolved it but would be good to test with a known file that is causing issues.

-daz
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Old 14th March 2011, 18:50   #3
idobi
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Unfortunately, I've already scrubbed the files on the server. I'll see if the DJs have older copies.

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Old 14th March 2011, 22:55   #4
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rightio, was worth a try, heh.

-daz
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Old 9th April 2011, 17:32   #5
idobi
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sent you some links and log data in private message

BTW when you look at the log file, I have it set up to send Artist - Title. When there's a problem reading the ID3 tags, it appears to reverts to the filename for the Metadata.

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