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SSTV Encoder

Image encoder for Slow-Scan Television (SSTV) audio signals

Modes

Supported SSTV modes:

  • Martin Modes: Martin 1, Martin 2

  • PD Modes: PD 50, PD 90, PD 120, PD 160, PD 180, PD 240, PD 290

  • Robot Modes: Robot 36 Color, Robot 72 Color

  • Scottie Modes: Scottie 1, Scottie 2, Scottie DX

  • Wraase Modes: Wraase SC2 180


The mode specifications are taken from the Dayton Paper, JL Barber, "Proposal for SSTV Mode Specifications", 2000:

http://www.barberdsp.com/downloads/Dayton%20Paper.pdf

Image

To load an image:

  • tap "Take Picture" or "Pick Picture" menu button, or
  • use the Share option of an app like e.g. Gallery.

To keep the aspect ratio, black borders will be added if necessary.

Original image can be resend using another mode without reloading.

After image rotation or mode changing the image will be scaled to that mode's native size.

After closing the app the loaded image will not be stored.

Text Overlay

Actions for working with text overlays:

  • Single tap to add a text overlay.

  • Single tap on text overlay to edit it.

  • Long press to move text overlay.

  • Remove the text to remove a text overlay.


After closing the app all text overlays will be stored and reloaded when restarting.

Menu

Available menu options:

  • "Play": Sends the image

  • "Stop": Stops the current sending and empties the queue

  • "Pick Picture": Opens an image viewer app to select a picture

  • "Take Picture": Starts a camera app to take a picture

  • "Save as WAVE File": Creates a wave file in the Music folder in SSTV Encoder album

  • "Transform Image":


    • "Rotate": Rotates the image by 90 degrees

    • "Reset": Resets image rotation and scaling


  • "Modes": Lists all supported modes


  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 2.12 (33) suggested Added on Jan 10, 2025

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (10)
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • om.sstvencoder.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.6 MiB PGP Signature | Build Log

  • Version 2.11 (32) - Added on Aug 18, 2024

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (10)
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • om.sstvencoder.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.6 MiB PGP Signature | Build Log

  • Version 2.10 (31) - Added on Jan 22, 2024

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (10)
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • om.sstvencoder.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.4 MiB PGP Signature | Build Log

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