[mythtv] DVB-S with no SDT / NIT tables

Steven Ellis steven at openmedia.co.nz
Sun Oct 28 11:22:01 UTC 2007

Manu Abraham wrote:
> Steven Ellis wrote:
>> On Wed, October 24, 2007 12:47 am, Janne Grunau wrote:
>>> On Tuesday 23 October 2007 07:26:25 Steven Ellis wrote:
>>>> There are some DVB-S services on Optus D1 that don't have any SDT or
>>>> NIT entries on their TS stream. For details see 12643V at
>>>> http://www.lyngsat.com/optusd1.html.
>>>> Now is there any way to specify Audio and Video PIDs for a channel
>>>> when the SDT information doesn't exist?
>>> The PIDs are defined in the in the PMT.
>>>> These channels can be loaded onto generic DVB-S STBs where you can
>>>> manually add the A/V PID details, and it would be great if we could
>>>> get them with MythTV. I've asked on the Users list, but after looking
>>>> at the code i'm wondering if it will need a patch.
>>> As long as there is no NIT+SDT and valid PAT+PMT on the transponder the
>>> scanner should find them.
>> Sadly there is no PMT either.
>> All that the DVB-S transponder is carrying are the Audio and Video PIDs,
>> there are no other information streams present.
> If there are is no valid PAT/PMT, then it is not a valid MPEG2 TS (which are 
> mandatory, not optional)

But it is using an MPEG2 TS "style" transport. The idea is that the PIDs
are hidden and only visible of "official" STBs. We know what the PIDs
are, the issue is persuading MythTV to tune it. No issues when using
mplayer/xine/vlc etc.


Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
sales   - sales at openmedia.co.nz
support - support at openmedia.co.nz
website - http://www.openmedia.co.nz

More information about the mythtv-dev mailing list