Controlling Page Turn Timing
Hi, Welcome to an advanced Read Aloud Text Highlighting tutorial. This tutorial is for ePub files created for iBooks on iOS devices but the information may be relevant and useful for other devices.
In this tutorial we will be learning how to control the timing of the automatic page turning in Read Aloud Text Highlighting.
Understanding the Basics
Page turns occur between “Two Page Spread” presentations of an ePub that has “Read Aloud” “Turn Pages – Automatically” enabled.
To increase the delay before the “Page Turn Starts” simply add some time to the end of the audio file.
If you have audio on only some pages then the pages without audio will default to a pause of 3 secs.
Two Page Spread Timing
Scenario 1 :- Text on both left and right pages.
In this option, when you are using separate audio files for the left and right page you may need to adjust the end of audio file 1 and the beginning of audio file 2 to avoid a delay when the narration flows from left to right page.
Scenario 2 :- Text on the left page, no text on right page.
In this option, the narration will start as we planned but there will be an extra 3 sec pause, because of the blank page, before the page turns occurs. If you want to change this pause you will need to add an audio file with “silence” the length of pause required and a corresponding “smil” file.
Scenario 3 :- Text on the right page, no text on left page.
In this option, the narration will start 3 sec after we planned because of the 3 sec pause generated by the blank page. The page turn will occur as planned. If you want to change this pause you will need to add an audio file with “silence” the length of pause required and a corresponding “smil” file, the same as option 2.
Easy ePub Creator Pro has an auto “smil” file generator that works without a matching “timing text” file. This feature generates a “smil” file with a single par id for the length of the audio file. The id is linked to a blank span id in the xhtml file. If you use this on the pages with no text and use a blank audio file you can change the default 3 sec pause to any length you choose. Use the sample file below and try it out.
Here is a link to a 1 sec blank audio file sample – 1 Sec Audio
For best performance and compatibility with the most devices, a “Two Page Spread” should use 1 “Audio” file and 1 “Timing Text” file for both pages.
This works for a “Two Page Spread” with text on either or both pages. Use add “Narration” to the left page (even if it has no text on it), choose “YES” to “Is this part of a two page spread”, and both page files will be auto generated.