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Slowrx is an SSTV decoder for Linux.
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This package is necessary and was needed to be installed along with ALSA on Linux Mint.
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README.md

slowrx

Slowrx is an SSTV decoder for Linux.

Created by Oona Räisänen (OH2EIQ [at] sral.fi).

http://windytan.github.io/slowrx/

Features

  • Support for a multitude of modes (see modespec.c for a list)
  • Detect frequency-shifted signals – no need to fine-tune the radio
  • Automatic slant correction, also manual adjustments are simple
  • Adaptive noise reduction
  • Decode digital FSK ID
  • Save received pictures as PNG
  • Written in C99

Requirements

  • Linux
  • Alsa (libasound2-dev)
  • Gtk+ 3.4 (libgtk-3-dev)
  • FFTW 3 (libfftw3-dev)

And, obviously:

  • shortwave radio with SSB
  • computer with sound card
  • means of getting sound from radio to sound card

Compiling

make

Running

./slowrx