TIP: Working with Filenames and Dolphin Publisher
(Applies to: Dolphin Publisher)
Dolphin Publisher and MP3 filename lengths
In this tip we will talk about the importance of the "Max. length of audio name" slider when you come to build the final version of your DAISY book (ready for re-distribution to others).
The "Max. length of audio name" slider works in tandem with the "Rename all audio files" check box (found in the "Encoding" property sheet of the project's "Build options"). These two options (when enabled) give the MP3 audio files in the finalized DAISY book more meaningful filenames (taken from the titles of the different text events / headings / sentences within the book).
However, if your DAISY book has large text events in it, then some software and hardware DAISY players can encounter problems if some of the output MP3 audio filenames in the book are over 256 characters in length. (i.e. The MP3 audio filenames were named after text events in the book that were over 256 characters in length.)
Therefore if you do decide to use the "Rename all audio files" check box when building your finalized DAISY book, then you will need to ensure that your book's output MP3 filenames are not excessively long by altering the "Max. length of audio name" slider in the "Encoding" property sheet of the project's "Build options" (F9), as pictured below (click image to see full size):
Perhaps set the "Max. length of audio name" to 20 or 22 characters. That way, all MP3 output filenames in your finalized DAISY book will be short enough for both Windows and any hardware DAISY player that you may have to play correctly.
Technical explanation
If you refer to the "Maximum filename length" column in the "Limits" table in Wikipedia's entry for different operating system's filesystems, you will see that 256 characters is the maximum filename length possible for most filesystems (and some are even shorter than that):
http://en.wikipedia.org/wiki/Comparison_of_file_systems#Limits
