[Vorbis-dev] libvorbis 1.2.2 RC1 -- comment padding

[John]

The front-end I have used for some years adds 1K 'padding' onto the Vorbis 
tags. It was set up to allow the user to select the number of bytes - 32, 64 
... 1024 but very soon was set on and left at 1024.

Of several thousand Ogg tracks I don't think I have needed more space on 
more than half a dozen. I don't put lyrics there though.

The amount of padding required may be more to do with the user's likes and 
dislikes than with file size or such. On tracks 'of interest' I can add all 
sorts of (probably useless) information, as that information comes to hand. 
Other tracks get Artist; Album.

Let the user specify the amount of padding at encoding stage.

J.
----- Original Message ----- 
From: <ogg.k.ogg.k at googlemail.com>
To: "Michael Gold" <mgold at ncf.ca>
Cc: <vorbis-dev at xiph.org>
Sent: Tuesday, December 16, 2008 9:47 PM
Subject: Re: [Vorbis-dev] libvorbis 1.2.2 RC1 -- comment padding


>> Are files generally re-encoded for streaming? If so, an encoder option to
>> disable padding should be sufficient. Another option would be to modify
>> the stream server to strip comment padding.
>
> Icecast repaginates, I think. Comments are typically not stripped, as it
> allows streaming players to display the new song name, etc.
>
>> My test file was muxed using ogmmerge. This isn't a Xiph.org tool but it
>> can associate tags like LANGUAGE with each audio stream. If such tags
>> are also used in Theora files, padding would be useful (and the relative
>> filesize probably makes it less of a concern).
>
> Typically very small (in any case, vorbiscomment, oggz-tools do this too).
>
>> Though this logic probably doesn't belong in libvorbis, and the encoder
>> would need to pick arbitrarily when encoding from stdin.
>
> Agreed.
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