Revision as of 18:31, 18 May 2017

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Overview

SyncSnap application allows you to take synchronized snapshots between cameras connected to the same SoC, such as a Tegra TX1 or Tegra TX2. Syncsnap application uses a client–server model design approach. The application consist of three basic sections:

A syncsnapd daemon application that runs as a state-machine process for handling snapshots.
A libsyncsnap library support the IPC to syncsnapd daemon that exposes the available SyncSnap methods.
A syncsnap example client application which uses libsyncsnap to access the syncsnapd exposed APIs showing how to use SyncSnap

Currently SyncSnap has been tested on TX1 boards configured with up to six cameras taking synchronized snapshots. Other features that are currently under development are:

Ability to synchronize capture pipelines using a PTP Clock (sync capture between boards).
A library to integrate calls
TX2 support

Testing Results

By pointing six cameras into a stopwatch timer RidgeRun has been able to verify that SyncSnap is able to capture synchronized buffers from six cameras:

First Set

Num Camera	Time on screen
1	29.374
2	29.358
3	29,391
4	29.358
5	29,391
6	29.358

Second Set

Num Camera	Time on screen
1	29.886
2	29.886
3	29.886
4	29.886
5	29.886
6	29.886

Getting the code

SyncSnap is an add-on to RidgeRun's professional SDK. You can purchase SyncSnap application, with full source code, from the RidgeRun Store.

SyncSnap usage example

ubuntu@tegra-ubuntu:~$ syncsnapd --help

Usage:
  syncsnapd [OPTION...] - Syncsnapd app

Help Options:
  -h, --help                        Show help options
  --help-all                        Show all help options
  --help-gst                        Show GStreamer Options

Application Options:
  -l, --save-location-path          Set the location path to save the pics, default: 
  -n, --num-cameras                 Set the number of cameras to use in order to take the snapshot 
  -s, --num-snapshots               Set the number of snapshots per start-capture command by each camera 
  -p, --enable-ptp                  Enable attach the Syncsnap Daemon to a PTP CLK (experimental) 
  -d, --domain                      PTP domain
  --stats                           Print PTP statistics

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