Embedded videos not playing in Thorium

edrlab / thorium-reader

A cross platform desktop reading app, based on the Readium Desktop toolkit

https://www.edrlab.org/software/thorium-reader/

BSD 3-Clause "New" or "Revised" License

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Embedded videos not playing in Thorium #1498

Closed clapierre closed 3 years ago

clapierre commented 3 years ago

Unable to play the videos embedded in this EPUB, clicking the play button

This same EPUB works fine with Vitalsource's Bookshelf, but when we click on the links to the video's all we hear with assistive technology is "Buffering" and nothing happens.

Phonetic_typing_tutorial V3.epub.zip

danielweck commented 3 years ago

Hello Charles, the videos do not play either in Google Chrome (reminder: Thorium relies on the Chromium web browser engine, by virtue of being an Electron app) Could you please confirm at your end by unzipping the EPUB container and by opening EPUB/text/ch002.xhtml directly in your installed web browser(s)? Personally I observe on MacOS that the videos fail to play in Chrome, but seem to play okay in Firefox and Safari (albeit with some audio glitches)

clapierre commented 3 years ago

Confirmed thanks @danielweck. Is there any video format that works with Thorium? Perhaps they could convert the .mp4's into another format.

danielweck commented 3 years ago

This looks like an encoding issue that trips Google Chrome / Chromium ... nothing we can solve directly in Thorium. Ideally the videos should be reencoded to work on all major web browsers, otherwise a bug report should be filed in the Chromium project.