Quote:
Originally Posted by Hitch
In other words, do you have any actual reason to think that what you're coding is wrong or incorrect? Have you ever seen an embedded video, from a commercially-made ePUB, with a poster, work with the poster visible in MoonReader?
Hitch
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In the past I have studied the phenomenon of video in an epub. I have found out through experience that something that is displayed correctly in Sigil is unfortunately no guarantee that this is also the case on another Epub reader.
Sigil follows the Epub standard very well, Epub readers usually follow it only very limited. You should be happy if the video is showing and anything more like display buttons and poster is usually not possible for more than the default key.
When HTML5 was introduced, not everything immediately worked perfectly in all web browsers. However, for HTML5 there are brenchmarks that show what a web browser does and does not support. Unfortunately I haven't seen a single brenchmark for Epub readers yet. As a result, there is no incentive for the makers of Epub readers to strive for their Epub readers to fully support the Epub standard.
And so unfortunately the development of an Epub reader is stuck on a digital plain text version of a paper book where you can be happy that the Epub reader can be displayed with many limitations with perhaps some text formatting and a video.
You may find that the attached Epub file shows which HTML commands your Epub reader supports. If an option is shown in red, it is not possible to use it in your Epub reader under any circumstances. But even with a green display, a completely correct display is not always the case, because only the acceptance of an HTML5 command can be tested, not the correctness of the display of the HTML5 command.
After a lot of research I have not succeeded in overruling the standard display of a video with my own control keys. In principle, there are many HTML5 examples on the Internet that are displayed correctly on a standard browser. The fact that the poster is not displayed on the Moon reader, but is displayed correctly on Sigil, leads me to the conclusion that the code is good, but that the Moon reader does not support a poster with a video.
If someone does have a poster view for a video, I'm very curious about the code of that Epub.