Example for pipe (ffmpeg_writer_basic)

Instantiates pipe device implemented by DevicePipe. More...

Collaboration diagram for Example for pipe (ffmpeg_writer_basic):

Instantiates pipe device implemented by DevicePipe.

# Start up a pipe from a fakeFrameGrabber to an ffmpeg_writer.
# this will save the output of fakeFrameGrabber into a movie.

device pipe

[source]
device fakeFrameGrabber
width 320
height 240
period 0.04
mode [ball]

[sink]
device ffmpeg_writer
out test.avi
framerate 25

If this text is saved in a file called ffmpeg_writer_basic.ini then the device can be created by doing:

yarpdev --file ffmpeg_writer_basic.ini

Of course, the configuration could be passed just as command line options, or as a yarp::os::Property object in a program:

Property p;
p.fromConfigFile("ffmpeg_writer_basic.ini");
// of course you could construct the Property object on-the-fly
PolyDriver dev;
dev.open(p);
if (dev.isValid()) { /* use the device via view method */ }

Here is a list of properties checked when starting up a device based on this configuration file. Note that which properties are checked can depend on whether other properties are present. In some cases properties can also vary between operating systems. So this is just an example

PROPERTY	DESCRIPTION	DEFAULT
device
source	device to read from (string or nested properties)
sink	device to write to (string or nested properties)

See also

DevicePipe