Autostarting VideoForLinux and device selection

ImFusion Suite General & How-to
1

Hi,

I’m generating a workspace file with a VideoForLinux input and would like to auto-start the acquisition, is this possible ?

Currently my workspace looks like:
In the “Datasets” section

		<property name="Data">
			<param name="uid">data0</param>
			<param name="name">Dummy video device (0x0000)</param>
			<property name="Configuration">
				<param name="name">Dummy video device (0x0000)</param>
				<param name="path">/dev/video4</param>
				<param name="format">842093913</param>
				<param name="grayscale">0</param>
				<param name="resolution">1600 2560 </param>
			</property>
		</property>

and in algorithms section

		<property name="VideoForLinux.VideoForLinux.Stream">
			<param name="name">Dummy video device (0x0000)</param>
			<param name="path">/dev/video4</param>
			<param name="format">842093913</param>
			<param name="grayscale">0</param>
			<param name="resolution">1600 2560 </param>
			<param name="execute">1</param>
			<param name="keepControllerOpen">1</param>
			<param name="inputUids"/>
			<param name="outputUids">"data0" </param>
		</property>

Note that the path(/name) configured in the workspace file does not seem to have an effect:
the “first” V4L device (my laptop internal webcam) is always selected when ImFusion starts, not the one matching /dev/video4.

Best Regards
Florent

2

Hi Florent,

Thank you for bringing this to our attention. This looks like a bug in the VideoForLinux.Stream algorithm. Unfortunately I don’t know of a simple workaround other than manually changing it every time.
I’ve created a ticket for this (internal ticket STREAM-102), it should be fixed in the next release of the Suite.

Cheers,
Ehsan

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