[mythtv] suggestion for rewinding in mythtv

[Hendrik Wouters]

Op woensdag 9 juni 2004 10:52, schreef Tako Schotanus:
> Derek Atkins wrote:
> >Damion de Soto <damion at snapgear.com> writes:
> >>Hendrik,
> >>
> >>>It still should be possible to rewind after switching the
> >>>tv-channel. That makes it possible to look if there is something
> >>>else on tv at a different channel first, before watching a recorded
> >>>livestream-buffer from an hour ago.
> >>
> >>I've thought about this a few times, and rewinding over channel changes
> >> does seem a bit strange, but I think it could work.
> >>
> >>I guess you've got to then decide which channel the 'live' tv stream
> >>should still be on, and what then happens if you try and change
> >>channels again whilst in a previously rewound stream (that already
> >>contains a channel change).
> >>Does it go to the end of the current 'live recording' and change channels
> >> there, or should it cut-out what's currently in between what's currently
> >> being watched, and real-time.
> >>
> >>lots of confusing and non-intuitive decisions.
> >
> >Doesn't seem confusing to me at all.. Indeed I found the existing
> >behavior to be non-intuitive..  If you consider the input to be a
> >stream, a channel change is just something that happens "upstream"
> >from mythtv..  I.e., it's just performing a bunch of read()s from the
> >video device, and a channel change is just an ioctl() to the device.
> >The fact that the frontend is "behind" real-time shouldn't matter.
> >IMHO a channel change should just continue from where in the ring
> >buffer it was already writing.
> >
> >In other words, the videocard input should always put data at the
> >end of the ring buffer.  Channel changes shouldn't affect that.
> >Where the frontend is reading from the ringbuffer shouldn't affect
> >that, either.
> >
> >As the channel change is just an ioctl I've always found it strange
> >that the ringbuffer resets itself during a channel change.
Yes, this is what I meant, sorry for my bad english.

Greetings Hendrik