kantCap - Capture Video Frame to PNG image.

Usage

Ex 1. kantcap will capture frame 1000 from "vid.mp4" video file to PNG file.

$kantcap -i vid.mp4 -fc  1000
kantcap -i <inputVideo> -fc <frameNumber>

Ex 2. kantcap will capture frame 100 to 200 from vid.mp4 video file to PNG files.

$kantcap -i vid.mp4 -fcr 100-200
kantcap -i <inputVideo> -frc <frameStart>-<frameStop>

Ex 3. kantcap will display vid.mp4 from frame 4000 onward.

$kantcap -i vid.mp4 -p 4000
$kantcap -i <inputVideo> -p <frameStart>

Install ffmpeg Library

$sudo apt update
$sudo apt install ffmpeg

To verity the installation,

ffmpeg -version

The result would be like this is the installation success.

ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1).........

Install SDL2

You can check whether the SDL2 is in your system or not

apt-cache search libsdl2 

The result would be:

libsdl2-2.0-0 - Simple DirectMedia Layer
libsdl2-dev - Simple DirectMedia Layer development files
libsdl2-doc - Reference manual for libsdl2
libsdl2-gfx-1.0-0 - drawing and graphical effects extension for SDL2
libsdl2-gfx-dev - development files for SDL2_gfx
libsdl2-gfx-doc - documentation files for SDL2_gfx
libsdl2-image-2.0-0 - Image loading library for Simple DirectMedia Layer 2, libraries
libsdl2-image-dev - Image loading library for Simple DirectMedia Layer 2, development files
libsdl2-mixer-2.0-0 - Mixer library for Simple DirectMedia Layer 2, libraries
libsdl2-mixer-dev - Mixer library for Simple DirectMedia Layer 2, development files
libsdl2-net-2.0-0 - Network library for Simple DirectMedia Layer 2, libraries
libsdl2-net-dev - Network library for Simple DirectMedia Layer 2, development files
libsdl2-ttf-2.0-0 - TrueType Font library for Simple DirectMedia Layer 2, libraries
libsdl2-ttf-dev - TrueType Font library for Simple DirectMedia Layer 2, development files

Otherwise, we need to install if the library can't be detected.

$sudo apt install libsdl2-dev

$sudo apt install libsdl2-image-dev

$sudo apt install libsdl2-mixer-dev

$sudo apt install libsdl2-ttf-dev 

Install libpng

$sudo apt-get update
$sudo apt-get install libpng-dev

Compile using "compile_kant.sh"

go into "sources" folder and run

./compile_kant.sh

Compile with cmake

at the same folder as "CMakeLists.txt"...then run

  $cmake -B build .
  $cmake --build build

Troubleshooting

If compile errors, similar to the picture below, you need to install more packages.

run apt-get to install the missing packages.

$sudo  apt-get  install  -y  libavformat-dev
$sudo  apt-get  install  -y  libswscale-dev
$sudo  apt-get  install  -y  libsdl2-dev
$sudo  apt-get  install  -y  libpng-dev