W3C home > Mailing lists > Public > whatwg@whatwg.org > January 2011

[whatwg] HTML5 video: frame accuracy / SMPTE

From: Eric Carlson <eric.carlson@apple.com>
Date: Tue, 11 Jan 2011 10:10:36 -0800
Message-ID: <1EBA05C7-B881-4968-AACD-EA3419BCB314@apple.com>

On Jan 11, 2011, at 9:54 AM, Rob Coenen wrote:

> just a follow up question in relation to SMPTE / frame accurate playback: As
> far as I can tell there is nothing specified in the HTML5 specs that will
> allow us to determine the actual frame rate (FPS) of a movie? In order to do
> proper time-code calculations it's essential to know both the video.duration
> and video.fps - and all I can find in the specs is video.duration, nothing
> in video.fps
> 
  What does "frames per second" mean for a digitally encoded video file, where frames can have arbitrary duration?

eric
Received on Tuesday, 11 January 2011 10:10:36 UTC

This archive was generated by hypermail 2.4.0 : Wednesday, 22 January 2020 16:59:29 UTC