[mythtv] Live playback / Timestretch

[Mark Spieth]

The problem is the processing/algorithmic latency involved in the WSOLA
algo.
thus any change is not instant. It will probably work.
However if you just want to set play speed back to 1.0 when livetv is near
the end (3 secs) I posted a couple of different patches that do this.
however it hasnt been accepted yet so am thinking of a different way without
too much network/db traffic.
cheers
mark

----- Original Message ----- 
From: "Neil Whelchel" <koyama at firstlight.net>
To: <mythtv-dev at mythtv.org>
Sent: Tuesday, January 11, 2005 5:30 PM
Subject: [mythtv] Live playback / Timestretch


> Hello,
> I was just wondering if anyone was working on or planning to work on a
> patch to use timestretch to keep live tv playback in sync. IE If playing
> live tv and the current playback position is within 30 seconds of real
> time, use timestretch to keep it there. If not, I would like to give it a
> shot..
>
> The thinking behind this is that in real use there always ends up being a
> slight offset between record and playback speed. (Seems to mostly be
> caused by poor audio hardware.) Some of my front end machines play faster
> and run out of data causing a brief pause (very annoying), other ones are
> a bit slower and fall behind (not as bad, but I personally don't like it
> either). So, if the front end sees that the current playback position is
> less than say 45 seconds behind current time, simply change the
> timestretch value a very small amount plus or minus to keep it closer to
> ~20 seconds.
>
> Any thoughts, or suggestions?
>
> -Neil Whelchel-
> First Light Internet Services
> 760 366-0145
> - We don't do Window$, that's what the janitor is for -
>
> Bubble Memory, n.:
>         A derogatory term, usually referring to a person's
> intelligence.  See also "vacuum tube".
>
>


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