Cable initial files require frequency, symbol rate, and the specific Quadrature Amplitude Modulation (QAM) scheme used by your provider.
: dvb-format-convert -I channel -O dvbv5 legacy_file dvbv5_initial_file . Running dvbv5-scan with an Initial File
dvbv5-scan /usr/share/dvb/dvbv5/dvb-t/uk-Rowridge -o ~/channels.conf Use code with caution. Explaining the Flags:
Here's a basic example of what an initial file might look like: dvbv5scan initial file
: The most up-to-date definitions can be found directly on the LinuxTV Git Repository. How to Create a Custom Initial File
Start with the pre-made files in /usr/share/dvb/dvbv5/ . If those fail, use w_scan to generate a custom initial file. For ultimate control, craft your own .ini entries using known parameters. With the knowledge from this guide, you will never again see the dreaded "Cannot find initial file" error.
my_initial_frequency.conf : Your custom or system-provided initial tuning file. Cable initial files require frequency, symbol rate, and
The state of the carrier wave, such as QAM64 , QAM256 , or QPSK .
If you've ever tried to set up a Digital Video Broadcasting (DVB) receiver on a Linux system, you've likely encountered the command dvbv5-scan . This powerful utility is the modern standard for scanning digital TV channels, but it comes with a crucial requirement: an . For many newcomers, knowing what this file is, where to find it, and how to create it can be the single biggest hurdle. This comprehensive guide will demystify the dvbv5-scan initial file, providing you with everything you need to know to master digital TV scanning on Linux.
Save the file with a descriptive name, such as us-ATSC-local-start or uk-Rowridge-DVBT2 . No specific file extension is required, though .conf or no extension is standard. Running dvbv5-scan with Your File Explaining the Flags: Here's a basic example of
: The absolute carrier frequency expressed in Hertz (Hz).
For further learning, explore the dvbv5-zap tool for channel tuning once your scan is complete, and consider contributing your own initial files back to the community to help other users in your region. The LinuxTV wiki and mailing lists are excellent resources for staying up-to-date with developments in the DVBv5 Tools ecosystem.
On Ubuntu, Debian, and Fedora systems, these pre-made files are installed via the dtv-scan-tables package. Once installed, you can find hundreds of regional files located in the /usr/share/dvb/ directory, organized by broadcast type ( dvb-t , dvb-c , dvb-s , atsc ). If you find that a pre-made file for your city is outdated, you can open it, modify the frequency line to match the new local listings, and run your scan immediately. Share public link
After a successful scan, dvbv5-scan can generate a comprehensive output file. This file includes not only the tuning parameters but also the service details, creating a rich database for applications like dvbv5-zap :