Subject: Re: [linux-audio-dev] SMTPE/MTC Again
From: Paul Davis (paul_AT_linuxaudiosystems.com)
Date: Mon Apr 14 2003 - 18:47:25 EEST
>Paul Davis writes:
> > not for locating to a given position. i know you can interpolate
> > running SMPTE, but when you use SMPTE as a point in time to go to,
> > this option is not available. you therefore can't use SMPTE to specify
> > sample-accurate edit points, etc.
>
>I really don't see the problem.
>
>IF every cycle is timestamped, then so is every sample.
SMPTE is two things (at least):
* a protocol that encodes time information in an audio stream
* a format for specifying time (HH:MM:SS:FF)
SMPTE cannot specify fractional frames because such things are not part
of the format (my understanding of this is based more on MTC, so
perhaps I need to say that MTC cannot encode fractional frames).
>Say you wand to drop-in at time t. Start playback,
wrong scenario. suppose i want to store the point in time where (say)
a zero crossing happens. SMPTE will not allow me to do that. i have to
store it as a sample position. if i use SMPTE, then i am not
guaranteed that the result actually refers to the desired sample.
--p
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