newspaperman
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I want to tell you about my success of successfully decoding of Generic Streams (GS) under certain requirements.
It's possible with help of a Cine S2 V7a. However I already got successfull reports with TBS 6903X. For decoding those GS it's necessary to receive the complete Baseband Frames (Bframes).
Older cards like e.g. TBS 6903 (without X) were not able to receive the BBFrames completely.
Both cards mentioned above have a modus that encapsulates the BBFrames into a psuedo TS. You can reconstruct a complete BBframe out of the payload of multiple TS packets.
Exact datails about the pseudo TS you can find here: https://github.com/DigitalDevices/dddvb/...r/docs/bbframes
I can't guarentee that a faultless decdoing is able with all GS muxes. For TBS6903x it was also necessary to patch the driver.
The stuff actually only works under linux and with commandline tools only.
Meanwhile I was successfull to decode both DAB bundesmuxes on 23°East as well as the NRK DAB muxes on 1°West.
On 33°East there's also a mini mux on 12544 V 1703 5/6 8PSK
As Generic streams mostly IPv4 is used for broadcast content and is transmitted from/to a multicast address using UDP protocol.
All other Generic Streams I found so far are usual internet traffic and is not of interest for us.
I published my or rather modified tools on github:
https://github.com/newspaperman
bbframe-tools: pts2bbf for decapsulating the Pseudo TS, bbfudpdecap for extraction of GS UDP streams out of the BBframes.
eti-tools: I extrended it with a tool called bbfedi2eti for the DAB muxes
gsextract-b8: can created a pcap file for wireshark out of the BBframes, unfortunately still buggy. I had to modify the original tool gsextract because I add a Sync byte 0xB( in front of each BBframe.
It's possible with help of a Cine S2 V7a. However I already got successfull reports with TBS 6903X. For decoding those GS it's necessary to receive the complete Baseband Frames (Bframes).
Older cards like e.g. TBS 6903 (without X) were not able to receive the BBFrames completely.
Both cards mentioned above have a modus that encapsulates the BBFrames into a psuedo TS. You can reconstruct a complete BBframe out of the payload of multiple TS packets.
Exact datails about the pseudo TS you can find here: https://github.com/DigitalDevices/dddvb/...r/docs/bbframes
I can't guarentee that a faultless decdoing is able with all GS muxes. For TBS6903x it was also necessary to patch the driver.
The stuff actually only works under linux and with commandline tools only.
Meanwhile I was successfull to decode both DAB bundesmuxes on 23°East as well as the NRK DAB muxes on 1°West.
On 33°East there's also a mini mux on 12544 V 1703 5/6 8PSK
As Generic streams mostly IPv4 is used for broadcast content and is transmitted from/to a multicast address using UDP protocol.
All other Generic Streams I found so far are usual internet traffic and is not of interest for us.
I published my or rather modified tools on github:
https://github.com/newspaperman
bbframe-tools: pts2bbf for decapsulating the Pseudo TS, bbfudpdecap for extraction of GS UDP streams out of the BBframes.
eti-tools: I extrended it with a tool called bbfedi2eti for the DAB muxes
gsextract-b8: can created a pcap file for wireshark out of the BBframes, unfortunately still buggy. I had to modify the original tool gsextract because I add a Sync byte 0xB( in front of each BBframe.