[mythtv-users] Re: Channel change - multiple ringbuffers

[Boyd II, Willy]

I'm willing to bet this would fall in the "not worth the time" category.
The idea of rewinding multiple channels may sound neat, but if you can't
reliably depend on it (only recently viewed channels would have buffers, and
of varying sizes depending on how long you watched), then what's the point?
Plus, creating a new buffer, and/or playing an old buffer, I believe would
bring up the same old problem of the player having enough data to play that
is the generally accepted theory of why things are slow (because admittedly
most of us haven't looked at the code, and the developers have more
important changes to deal with).  Ideally a video buffer should just buffer
video data, there shouldn't be a reason it knows anything about "channel
changes", *except* for that fact that it's cleaner to not allow the player
to rewing across the change.  That, as I understand it, is the reason for
starting a new file.  My intuition tells me there's gotta be a better way,
but i'm not yet to the educated point of being able to give back to the
project (...yet).

- Willy

-----Original Message-----
From: Sean, Sharon and Kyle Harbour [mailto:sharbours at yahoo.com] 
Sent: Tuesday, September 30, 2003 2:58 PM
To: mythtv-users at mythtv.org
Subject: [mythtv-users] Re: Channel change - multiple ringbuffers


Here's a thought. What if the ringbuffer kept a separate file for each
channel, and deleted the oldest as required to free up space? That way,
switching back to a channel that was already in the ringbuffer should be a
little faster, plus you would be able to rewind whatever was in it. There
would be a 'skip spot' from where it stopped buffering while you were
viewing a different channel. Is this something that would be easy to
implement, or not worth the time?

FYI, I have an AMD 1200, and it takes about 3 seconds to change channels
using EXT3. I'll change it to ReiserFS tonight and see if it helps.

Sean Harbour

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