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Re: [media-and-entertainment] Frame accurate seeking of HTML5 MediaElement

From: Nigel Megitt via GitHub <sysbot+gh@w3.org>
Date: Mon, 18 Jun 2018 16:02:52 +0000
To: public-web-and-tv@w3.org
Message-ID: <issue_comment.created-398106111-1529337766-sysbot+gh@w3.org>
> The key thing is indeed to be able to act essentially in sync with the frame changes, so that you can match external actions to frame changes in the video.

@Daiz as I just pointed out on the M&E call, this is only known to be true at the 25-30fps sort of rate, designed to be adequately free of flicker for video. It's unknown at high frame rates, and entirely inadequate at low frame rates, where synchronisation with audio is more important. 

We should avoid generalising based on assumptions that the 25-30fps rate will continue to be prevalent, and gather data where we don't yet have it. We also need a model that works for other kinds of data than subtitles and captions, since they may have more or less stringent synchronisation requirements.

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Received on Monday, 18 June 2018 16:02:59 UTC

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