slide

Simple, lightweight slideshow selecting random images from specified directory. This slideshow is designed to compile and run also on a Raspberry Pi, for example to turn it into a digital picture frame.

Tested versions:

Raspberry Pi 3 running Raspbian Stretch.
Raspberry Pi 3 running Raspbian Buster.
Raspberry Pi Zero running Raspbian Buster.

Screen background is filled with a scaled version of the image to prevent pure black background.

This project is maintained by myself during my spare time. If you like and use it, consider buying me a coffee.

Usage

slide [-t rotation_seconds] [-a aspect] [-o background_opacity(0..255)] [-b blur_radius] [-p image_folder|-i imageFile,...] [-r] [-O overlay_string] [-v] [--verbose] [--stretch]

image_folder: where to search for images (.jpg files)
-i imageFile,...: comma delimited list of full paths to image files to display
-r for recursive traversal of image_folder
-s for shuffle instead of random image rotation
-S for sorted rotation (files ordered by name, first images then subfolders)
rotation_seconds(default=30): time until next random image is chosen from the given folder
aspect(default=a): the required aspect ratio of the picture to display. Valid values are 'a' (all), 'l' (landscape), 'p' (portrait) and 'm' (monitor). Monitor will match the aspect ratio of the display we are running on.
background_opacity(default=150): opacity of the background filling image between 0 (black background) and 255
blur_radius(default=20): blur radius of the background filling image
-v or --verbose: Verbose debug output when running, plus a thumbnail of the original image in the bottom left of the screen
--stretch: When in aspect mode 'l','p' or 'm' crop the image rather than leaving a blurred background. For example, in landscape mode this will make images as wide as the screen and crop the top and bottom to fit.
-O is used to create a overlay string.
- It defines overlays for all four edges in the order top-left;top-right;bottom-left;bottom-right
- All edges overlays are separated by ;
- Each edge can either be just a test or contain formatting in the form margin|fontsize|text
- the text can contain special strings which are replaced during rendering:
  - <time> current time
  - <date> current date
  - <datetime> current time and date
  - <exifdatetime> time stamp from the EXIF data of the image
  - <filename> filename of the current image
  - <basename> basename of the current image (without suffix)
  - <filepath> filename including the path of the current image
  - <dir>directory of the current image
  - <path>path to the current image without filename
- Example: slide -p ./images -O "20|60|Time: <time>;;;Picture taken at <exifdatetime>"

To exit the application, press escape. If you're using a touch display, touch all 4 corners at the same time.

Folder Options file

When using the default or recursive folder mode we support having per folder display options. The options are stored in a file called "options.json" and currently support the following option

{
    "fitAspectAxisToWindow": false
}

fitAspectAxisToWindow : apply the --stretch option to files in this folder

Dependencies

qt5-qmake
qt5
qt5-image-formats-plugins
libexif

Ubuntu/Raspbian:

sudo make install-deps-deb

Build

Install dependencies

make install-deps-deb

Build project

make

Install binaries

sudo make install

macOS

Prerequisite: brew

brew install qt5
brew install libexif
brew install libexif
make

Article on using slides

This article has more helpful ways that you could use this repo as a picture frame
https://opensource.com/article/19/2/wifi-picture-frame-raspberry-pi

Removing black border (Raspberry Pi)

if you find that you have a black border around your screen you can remove it by disabling overscan. This is done by editing /boot/config.txt and uncommenting disable_overscan=1

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