[mythtv] Effect of Multi-rec on channel change times....?

Mark Buechler mark.buechler at gmail.com
Thu Jul 12 14:08:54 UTC 2007

The problem here is not the channel changing time of the backend but more
the buffering time of the frontend. The backend actually changes channels
quite fast, in my opinion, considering what it's doing. Myth's frontend at
times seems to have trouble estimating bitrate and tends to buffer too much
and then read too much, resulting in more prebuffering. On most HD content,
however, it does quite well on since the bitrate is much higher. Basically,
I think Myth/ffmpeg is estimating bitrate too high is most circumstances.

But I could be (and probably am) talking out my ass.

- Mark.

On 7/12/07, Simon Kenyon <simon at koala.ie> wrote:
> Daniel Kristjansson wrote:
> > STB firmware doesn't have to work with the variety of hardware
> > that MythTV does; when I set a timing threshold for something
> > in MythTV I find a value that works on all my machines
> > then double or triple it (or if all it will cause is a
> > temporary glitch and it is critical that it is low, I add
> > 30% and try to get as many people as possible to test it).
> >
> >
> would it be possible to (i.e. will you)?:
> - get these various timeouts from the database
> - use the current numbers as the defaults
> - add some instrumentation to the code to record the various events that
> fire
> - optionally provide a UI to allow users to tweak these numbers
> this way, users with faster hardware could improve switching time.
> i know this sounds like a feature request without a patch, so you can
> freely igmore it.
> but just in case the idea appeals to one of you i'm putting it out there.
> i have a FE in my bedroom and *do* use live-tv
> --
> simon
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