As digital broadcasting standards continue to evolve, the DVBv5 format provides a future-proof solution that supports all current and emerging delivery systems. With the ability to discover additional transponders automatically, even a minimal initial file can lead to a complete channel scan in most environments.
ERROR: Cannot find initial file for adapter0/frontend0. Please provide a valid initial file.
The initial frequency is correct, but the broadcaster has disabled the Network Information Table (NIT) PID link, or the signal is too weak to decode data packets.
The tool will start scanning. It will use your initial frequency, lock onto it, read the Network Information Table (NIT), and automatically discover all other frequencies and services. dvbv5scan initial file
For , an "initial file" (or scan table) provides the starting frequencies and tuning parameters the tool needs to find available digital TV services. Unlike automated tools that blind-scan the entire spectrum, dvbv5-scan relies on this file to target specific known transponders. Structure of an Initial File
Terrestrial files require geographic precision because frequencies change from city to city.
reads this file to lock onto a known working transponder, read its Network Information Table (NIT), and automatically discover all other available channels and services on that network. LinuxTV.org 📂 Where to Find Initial Scan Files As digital broadcasting standards continue to evolve, the
dvb-format-convert -I channel -O dvbv5 my-old-channels.conf my-new-initial-file.conf
[CHANNEL] DELIVERY_SYSTEM = DVBC/ANNEX_A FREQUENCY = 322000000 SYMBOL_RATE = 6900000 INNER_FEC = NONE MODULATION = QAM/256 INVERSION = AUTO
To initiate the scan, point the tool at your initial file: dvbv5-scan /usr/share/dvbv5/dvb-t/de-Berlin dvbv5-scan and dvb-channels.conf · Issue #31 - GitHub Please provide a valid initial file
Example: For a standard Universal LNB (LOF Low: 9750 MHz, LOF High: 10600 MHz), if your satellite transponder is at 11.8 GHz: 11800 - 9750 = 2050 MHz . So FREQUENCY = 2050000000 Hz.
-v (Optional): Enables verbose mode. Use this if the scan fails, as it shows real-time signal strength (SNR) and locking status. Troubleshooting Common Errors 1. "dvbv5-scan: Engine failed to lock"
This example defines a DVB-C (cable) channel using Annex A, with a frequency of 113 MHz, a symbol rate of 6.9 million symbols per second, no inner FEC, QAM/64 modulation, and auto inversion detection.
The general structure for a DVB-T initial file looks like this:
Think of it as the initial search grid your tuner uses to find a signal. The dvbv5-scan utility takes this file, tunes to each frequency listed, and listens to the broadcast data stream. Once a lock is acquired, the tool reads the , a part of the MPEG-TS data stream. This table often contains information about other transponders and services available, allowing dvbv5-scan to discover channels beyond those in your initial file and build a complete channel map.