validator

Copyright (C) 2021, Axis Communications AB, Lund, Sweden. All Rights Reserved.

Application to validate video authenticity

Note: This example application code also serves as example code for how to implement the validation side of the Signed Video Framework.

Prerequisites

This application relies on GstAppSink (part of gStreamer) and signed-video-framework.

• gStreamer
• signed-video-framework

Description

The application process NALU by NALU and validates the authenticity continuously. The result is written on screen and in addition, a summary is written to the file validation_results.txt.

It is implemented as a GstAppSink that process every NALU and validates the authenticity on-the-fly.

Building the validator application

Below are meson commands to build the validator application. First you need to have the signed-video-framework library installed.

Then build the validator application with meson as

meson -Dvalidator=true path/to/signed-video-framework-examples path/to/build/folder
meson install -C path/to/build/folder

Example meson commands on Linux

These example commands assume the current directory is the parent directory of both signed-video-framework and signed-video-framework-examples.

Build and install the library locally in ./my_installs/.

meson --prefix $PWD/my_installs signed-video-framework build_lib
meson install -C build_lib

Then build and install the validator in the same place

meson --prefix $PWD/my_installs -Dvalidator=true signed-video-framework-examples build_apps
meson install -C build_apps

The executable is now located at ./my_installs/bin/validator

Running

Validate an MP4 file of an H264 video using the app

./path/to/your/installed/validator -c h264 signed_test_h264.mp4

With the example Linux commands above testing signed_test_h264.mp4 in test-files/

./my_installs/bin/validator -c h264 signed-video-framework-examples/test-files/signed_test_h264.mp4

There are both signed and unsigned test files in test-files/ for both H264 and H265.