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HTML5 subtitle issue with Firefox browser update

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I am working on a video player on my web app. An issue only occurs in latest Firefox browser where html5 video subtitle stacks til all of the subtitle are pushed up the video.

I am working on a video player on my web app. An issue only occurs in latest Firefox browser where html5 video subtitle stacks til all of the subtitle are pushed up the video.
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Modified by tenshinadela

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Thanks. It looks like this bug was discovered during the beta of Firefox 67, but due to timing, was fixed only for Firefox 68 and later: Bug 1535005 - [webvtt] html5 video captions doesn't disappear after seeking back to a position with an other caption.

I checked in Firefox Developer Edition (version 68.0b6) and the problem does not occur there. So, I think we all just have to wait for Firefox 68.

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All Replies (7)

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Hi tenshinadela, can you provide a link to a page/video demonstrating this problem?

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tenshinadela said

You can try the video here https://www.html5rocks.com/en/tutorials/track/basics/

The first video? The titles work fine if I let it play through. If I click anywhere along the player progress bar while a subtitle is displayed, then there is a problem of the updated title not replacing the existing one. Is that what you see?

(I run Firefox 67.0.2 on Windows 10.)

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Yes, you are correct. Apologize for not posting a clear description for this issue.

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Just a side note: The System Details list shows you have a rather old Shockwave Flash 26.0 r0 plugin (current is 32.0.0.207 (32.0 r0; 2019/06/11))

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Seçilmiş Həll

Thanks. It looks like this bug was discovered during the beta of Firefox 67, but due to timing, was fixed only for Firefox 68 and later: Bug 1535005 - [webvtt] html5 video captions doesn't disappear after seeking back to a position with an other caption.

I checked in Firefox Developer Edition (version 68.0b6) and the problem does not occur there. So, I think we all just have to wait for Firefox 68.

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That's great. Thank you I tested it on Firefox 68 and it worked fine.