<div dir="ltr"><div>A little off-topic, but the Ceton 6 ETH doesn't require that funky Ceton driver that is no longer builds with the kernel? I had to give up my 4-tuner PCI-Express card because of that.</div><div><br></div><div>Steve<br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><br></div><div>Steve Greene<br>(301) 842-8923</div><div><a href="http://historicity.co" target="_blank">historicity.co</a><br></div>An independent archival professional specializing in still photography, moving images and recorded sound.<br></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 28, 2021 at 12:18 PM Peter Bennett <<a href="mailto:pb.mythtv@gmail.com">pb.mythtv@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
On 7/28/21 11:34 AM, <a href="mailto:f-myth-users@media.mit.edu" target="_blank">f-myth-users@media.mit.edu</a> wrote:<br>
> Interesting. I can find very little about this via a web search:<br>
> mythtv "schedule as a group"<br>
> returns about three not-very-informative hits. (Which is surprising,<br>
> since I'd swear I heard about this on the mailing list some time ago,<br>
> and I would have guessed that Google would return those messages.)<br>
><br>
> However, all six of the real tuners (the first six rows) in my<br>
> cpturecard table do have "schedgroup" set to 1. (And all of the<br>
> later entries do not.)<br>
><br>
> If this really does override reclimit, then obviously fiddling with<br>
> that won't matter. But what does schedgroup buy me? Overlapping<br>
> (same-"channel", from pre/postroll) recordings sharing a tuner?<br>
> (Hope so!)<br>
><br>
> The other reason I'm confused re multiplexes etc is that if I go to the<br>
> web interface for the Ceton, I can clearly see that each channel claims<br>
> a whole bunch of "program" entries, and it's a different list for each<br>
> individual channel. (Some are mostly in the 1-10 range; some have half<br>
> a dozen entries like 1, 10, 2804, etc.) My assumption was that these<br>
> were different streams multiplexed on the TS stream arriving for that<br>
> channel---if I record the card "by hand" using its web interface and<br>
> just dump the stream into a file using netcat, things like mpv will<br>
> report that there are are huge numbers of audio and video streams:<br>
<br>
When using a cable card, the Ceton can only record one channel per <br>
tuner. If you set Max Recordings to more than one, the pre-roll or <br>
post-roll for two consecutive recordings on the same channel can be <br>
accommodated with one tuner, where in previous versions that would use <br>
two tuners or ignore the pre and post roll if there weer not enough <br>
tuners. The "schedule as a group" setting, which is now default, allows <br>
the system to dynamically increase the "Max Recordings" settings when <br>
the same channel is needed for two recordings at the same time. When Max <br>
Recordings is more than one, extra (virtual) tuners are created and <br>
shown in the status.<br>
<br>
Multiplexes exist on the wire and the ceton shows them as multiple <br>
programs per channel, but MythTV cannot take advantage of this to record <br>
several programs from one channel on one tuner because of the decryption <br>
done by the cable card, which will only decrypt one program of a channel <br>
at a time.<br>
<br>
Peter<br>
<br>
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</blockquote></div>