[mythtv-users] Record >1 channel per multiplex?

[Rene Bartsch]

> Rev Simon Rumble wrote:
>> I'm about to set up my Myth system and have been curious about whether
>> this feature was ever implemented.  It's mentioned in this ticket:
>> http://svn.mythtv.org/trac/ticket/1772
>>
>> Which was closed as "invalid" without comment?
>>
>> This is certainly a feature I'm sure lots of DVB users would like,
>> effectively multiplying the number of channels that can be recorded in
>> some situations.
>>
>> For those unaware of it, DVB can have multiple channels for each
>> frequency transmitted.  That means one tuner can record from more than
>> one channel at once, where they share a multiplex.
>>
>> It's not enormously useful in Australia, where the government chose to
>> ban multi-channeling for most of the station owners.  In the UK,
>> however, it would be incredibly useful.
>>
>> So is this implemented?  What would it take to implement it?  Would a
>> bounty be one way to go about getting it done?
>>
>>
> Just to put a new spin to this.
>
> In Finland it would be possible to cover EVERY current DVB-T broadcast
> with jut three tuners...
> This would be something I would also be willing to put my money where
> this writing is going.

In Europe, we have about 8 TV programs or about 20 radio programs on one
satelite transponder. In my area (Hessen/Germany) all 24 DVB-T programs
are transmitted on 6 VHF/UHF channels (4 TV programs per 14 MBit/s
channel).

So there is need for multiplex recording. Having used VDR for years and
some experience with broken recordings because of error in TS streams, I'd
suggest to get a TS stream from the DVR device and remux it in software
into several MPEG streams. Most important will be to fork ONE process per
remux instance to prevent crashing the mythtv-backend and other remux
instances when a remux instance is crashed by errors in the TS stream
(which currently is quite annoying using MythTV with DVB).

I'd also add 20,- EUR of student's budget ;-)

Renne