[Vorbis] edit comment

[Ulrich Windl]

On 5 Nov 2007 at 18:07, Ivo Emanuel Gonçalves wrote:

> On 11/5/07, Rafa Zafra Fuentes <rafa_zafra_fuentes at hotmail.com> wrote:
> > How i can edit the comments of a vorbis file?
> 
> You need a player compatible with the VorbisComment standard.  If you
> use Microsoft Windows, you may edit those fields in Winamp or
> foobar2000.

Reminds me of: I had some large (40MB) TIFF image files where the metadata had a 
problem, and I wanted to batch-fix them. Reading the file into memory, change 
them, and then re-write them seemed to inefficient. So I wrote a program that 
replaces the metadata in-place whenever possible, leaving the image data where 
they are. OK, TIFF structure makes it rather easy. Actually I had tried to do a 
similar thing with Vorbis, but that seems quite tricky (I wanted to _locate_ the 
position where the comments are, and then overwrite them in place). Did anybody 
try such a thing?

> 
> WinVorbis[1] is a program which is dedicated for the sole purpose of
> editing VorbisComment fields.  You may want to look into it as well.

All these programs do a read/modify/write cycle on the whole file, right?

Regards,
Ulrich