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Subject: Re: [boost] Gauging interest in time code for broadcasters...
From: Dave Abrahams (dave_at_[hidden])
Date: 2012-10-09 22:03:17

on Tue Oct 09 2012, Joseph Van Riper <> wrote:

> The library I propose would be capable of converting drop-frame timecode,
> which is a little problematic for Boost.Chrono.
> Boost.Chrono, if I have it right, requires a ratio. But, to properly
> express drop-frame according to SMPTE standards, one must perform a couple
> of calculations in an algorithm. If you use the ratio approach, you will
> be at least 2 frames off a day for drop-frame. That kind of accuracy might
> matter to some people. It has, at least, mattered to my company.

It's been years since this has been relevant to my work, but in case
anyone is wondering, it's a real issue. Uniform time such as that
represented by chrono doesn't cover all use-cases.

Dave Abrahams
BoostPro Computing                  Software Development        Training             Clang/LLVM/EDG Compilers  C++  Boost

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