GSCam

This is a ROS package originally developed by the Brown Robotics Lab for broadcasting any GStreamer-based video stream via the standard ROS Camera API. This fork has several fixes incorporated into it to make it broadcast correct sensor_msgs/Image messages with proper frames and timestamps. It also allows for more ROS-like configuration and more control over the GStreamer interface.

Note that this pacakge can be built both in a rosbuild and catkin workspaces.

ROS API (stable)

gscam

This can be run as both a node and a nodelet.

Nodes

gscam

Topics

camera/image_raw
camera/camera_info

Services

camera/set_camera_info

Parameters

~camera_name: The name of the camera (corrsponding to the camera info)
~camera_info_url: A url (file://path/to/file, package://pkg_name/path/to/file) to the camera calibration file.
~gscam_config: The GStreamer configuration string.
~frame_id: The TF frame ID.
~reopen_on_eof: Re-open the stream if it ends (EOF).
~sync_sink: Synchronize the app sink (sometimes setting this to false can resolve problems with sub-par framerates).

C++ API (unstable)

The gscam c++ library can be used, but it is not guaranteed to be stable.

Examples

See example launchfiles and configs in the examples directory. Currently there are examples for:

Video4Linux2: Standard video4linux-based cameras like USB webcams
Nodelet: Run a V4L-based camera in a nodelet
Video File: Any videofile readable by GStreamer
DeckLink: BlackMagic DeckLink SDI capture cards (note: this requires the gst-plugins-bad plugins)

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