[vdr] VDR's UpdateChannels destroys channel information

Teemu Suikki tsuikki at zuik.org
Thu Mar 21 14:07:50 CET 2013


A bit more into this..

I tried dvbsnooping different satellites, I noticed some difference.

This is from Thor, 1.0W:


-----------------------
    Transport_stream_ID: 4 (0x0004)
    Original_network_ID: 70 (0x0046)  [= 1 degree W | Telenor]
    reserved_1: 15 (0x0f)
    Transport_descriptor_length: 191 (0x00bf)

            DVB-DescriptorTag: 67 (0x43)  [=
satellite_delivery_system_descriptor]
            descriptor_length: 11 (0x0b)
            Frequency: 17967360 (=  11.22900 GHz)
            Orbital_position: 16 (=   1.0)
            West_East_flag: 0 (0x00)  [= WEST]
            Polarisation: 0 (0x00)  [= linear - horizontal]
            Kind: 0 (0x00)  [= DVB-S]
            fixed ('00'): 0 (0x00)
            Modulation_type: 1 (0x01)  [= QPSK]
            Symbol_rate: 2379776 (=  24.5000)
            FEC_inner: 5 (0x05)  [= 7/8 conv. code rate]

            DVB-DescriptorTag: 65 (0x41)  [= service_list_descriptor]
            descriptor_length: 30 (0x1e)
               service_ID: 418 (0x01a2)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               (other sid's follow, cut away for clarity)
----------------------------

But this "faulty" transponder in S13E:

----------------------------
   Transport_stream_ID: 7500 (0x1d4c)
    Original_network_ID: 64511 (0xfbff)  [= Sky Italia | Sky Italia Spa.]
    reserved_1: 15 (0x0f)
    Transport_descriptor_length: 54 (0x0036)

            DVB-DescriptorTag: 65 (0x41)  [= service_list_descriptor]
            descriptor_length: 39 (0x27)
               service_ID: 4117 (0x1015)[ --> refers to PMT program_number]
               service_type: 25 (0x19)  [= advanced codec HD digital
television service]

               (other sid's follow, cut away for clarity)

            DVB-DescriptorTag: 67 (0x43)  [=
satellite_delivery_system_descriptor]
            descriptor_length: 11 (0x0b)
            Frequency: 19007128 (=  12.20698 GHz)
            Orbital_position: 304 (=  13.0)
            West_East_flag: 1 (0x01)  [= EAST]
            Polarisation: 0 (0x00)  [= linear - horizontal]
            Kind: 1 (0x01)  [= DVB-S2]
            Roll Off Faktor: 0 (0x00)  [= Alpha 0.35]
            Modulation_type: 2 (0x02)  [= 8PSK]
            Symbol_rate: 2723840 (=  29.9000)
            FEC_inner: 3 (0x03)  [= 3/4 conv. code rate]

----------------------------

So.. DVB-DescriptorTag's 65 and 67 appear in opposite order! Could it
be that VDR has transponder data still uninitialized when it is
scanning the service id, because 67 is not arrived yet?

-- 
Teemu Suikki
http://www.z-power.fi/



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