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neumoDVB

Interfacing with external programs

When neumoDVB is tuned to services or muxes or is streaming them, DVB data can be passed to external programs in multiple ways.

The easiest is to create and start a stream, e.g., to port 9999 on some computer, either the one on which neumoDVB is running (use 127.0.0.1 as the destination) or some other computer (use its host name or IP adress).

While neumoDVB has tuned to a mux, data can also be read out of the linux adapter in the following way

  • First identify the frontend in use for a specific mux on the frontendslist screen. The adapter column will have entries like A1 TBS 6909X, indicating that the adapter number: 1 in this example.
  • On the computer running neumoDVB, the command dvbsnoop -adapter 1 -s ts -tsraw -b will send a complete transport stream to standard output, which allows it to be saved or processed:
    • Saving: dvbsnoop -adapter 1 -s ts -tsraw -b > /tmp/test.ts
    • Analyzing with dvbsnoop: e.g., dvbsnoop -adapter 1 -s ts -tssubdecode -ph 0 0x0
    • Analyzing with tsduck: e.g., dvbsnoop -adapter 1 -s ts -tsraw -b | tsp -P until --seconds 15 -P analyze -O drop

While neumoDVB is streaming a mux or service to port 9999 on some computer, data from the stream can be processed on that computer as follows:

  • Saving: tsp -I ip 9999 > /tmp/test.ts
  • Piping to some other programs standard input: tsp -I ip 9999 | dvbsnoop -if - -s ts -tssubdecode -ph 0 0x0

Viewing services

Such a stream is an UDP stream. It can be viewed with various programs For example:

  • vlc udp://@:9999
  • mpv udp://@:9999

In case a complete transport stream is being streamed, you will need to use the menu in vlc to select a service for viewing. mpv instead will pick one itself.

Analyzing streams

tsduck and dvbsnoop are good programs to analyse streams.

tsduck can take transport streams as input via UDP, and then manipulate them in various ways, such as extracting T2MI substreams (but neumoDVB can do that as well), extracting specific services, inserting EPG, or analyzing the stream in various ways. dvbsnoop cannot directly read UDP streams, but yo

Some analysis examples:

  • Analyzing using tsduck: tsp -I ip 9999 -P until --seconds 15 -P analyze -O drop Analyzes the stream during 15 seconds, displaying PIDs, bit rates, services ...
  • Analyzing the PAT table using dvbsnoop: `tsp -I ip 9999 | dvbsnoop -if - -s ts -tssubdecode -ph 0 0x0

Analyzing and listening to DAB

The following examples assume that you first create and start a stream for 11013V-11 at 5.0W to port 9999, which contains a DAB substream. Then you can

  • Inspect the DAB channels: tsp -I ip 9999 | ts2na -p 1000 -s 0 | na2ni | ni2out --list
  • Listen to embedded DAB using dablin-gtk: tsp -I ip 9999 | ts2na -p 1000 -s 0 | na2ni | dablin_gtk

The following examples assume that you first create and start a stream for 11426H at 28.2E to port 9999, which contains a DAB substream. Then you can

  • Inspect the DAB channels: tsp -I ip 9999 | ts2na -p 1063 -s 12 | na2ni | ni2out --list
  • Listen to embedded DAB using dablin-gtk: tsp -I ip 9999 | -p 1063 -s 12 | na2ni | dablin_gtk