Documentation for Intellect 4.11.0-4.11.3. Documentation for other versions of Intellect is available too.

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The Video capture device object for grabbing video image from application windows via FFMPEG driver can be added either by manually creating the Video capture device or using the Camera discovery tool. The latter way is preferable.

The additional options allow selecting the application window as well as adjusting the area and decompression parameters. Currently, the driver supports the following codecs: video capture in MJPEG (default) and RGBA/BGRA formats, decompression to MJPEG, MPEG2, YUV422.

Creating the Video capture device and Audio card object

Add the Video capture device object for grabbing video image from application windows and Audio card and Microphone objects for grabbing sounds via FFMPEG driver as follows:

  1. Start the Camera discovery tool.

  2. Enter any IP address in the IP address field (1). The driver automatically sets the proper address for this model.

    Note.

    When adding this device type by manually creating the Video capture device object, set the IP address as described in Additional options for the FFMPEG device subsection below.

  3. From the Brand drop-down list, select FFMPEG (2).
  4. From the Model drop-down list, select Windows capturer (3).
  5. From the Firmware drop-down list, select auto (4).
  6. Click Add (5). The device is added to the list.
  7. Set the checkbox next to the added device (6).
  8. Click Apply (7).
  9. Click Exit (8).

Additional options for the FFMPEG device

The address with additional options for the ffmpeg utility can be specified in the IP address field on the Video capture device object settings panel. In this case, the address has the following format:

gdigrab://"App_name"[:-additionalOptions]

App_name is the name of the application that appears in the title bar of the window. The name must contain only Latin characters and/or digits. If there are any other symbols in the window title, use third party tools to change the title.

additionalOptions allow setting a specific area and several other options. Below is the list of options supported by the ffmpeg library for the gdigrab mode:

  • -draw_mouse <int> draw the cursor (0 or 1) (1 by default);
  • -show_region <int> draw borders across the capture line (0 or 1) (0 by default);
  • -framerate <video_rate> set frame rate ("ntsc” by default);
  • -video_size <image_size> set frame size;
  • -offset_x <int> indent along the x axis of the capture area (from INT_MIN to INT_MAX) (0 by default);
  • -offset_y <int> indent along the y axis of the capture area (from INT_MIN to INT_MAX) (0 by default);

Example of IP address field with "additionalOptions” property:

gdigrab://"Calculator":-draw_mouse 1 -show_region 1 -framerate 25 -video_size 640x480 -offset_x 10 -offset_y 10​
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