Old B/W or unsupported modes can be viewed in "Raw Mode".
If an calibration header gets detected, the resulting image will be saved in the "Pictures" directory and can be immediately seen in the Image gallery.
Switching away to another application will not stop the decoder and it will continue to run in background. To stop the decoder, you can either press pause or exit via the "back" button of Android.
Here you can find my wife's free open source SSTV Encoder:
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.