waldrand

What I try to to is to modify the ID3 meta data of a mp3 file. That means I have to add same bytes before the mp3 data. I wrote it allready, but it takes time and okkupies memory at large file. I read the whole file added the bytes at the start and replaced the file. I am looking for a better solution.

If I use the Vi's "get file size" "set file size" and "set file position" I can increase or shorten the filesize. Changes are only at the end of the file. Is there any posibillity to do this at the startposition of a file? It means, can I add or delete (not replace) bytes at the start position? The size would become longer or shorter. This makes sence for large files. I am looking for adding or deleting an header to a large file without reading the whole file.