doc: Add -list_formats all example for video4linux2

Signed-off-by: N Luca Barbato <lu_zero@gentoo.org>

doc: Add -list_formats all example for video4linux2
Signed-off-by: N Luca Barbato <lu_zero@gentoo.org>
cecf45b2 · Jonas Lindgren · Luca Barbato · 9731cf40 · cecf45b2
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doc/indevs.texi doc/indevs.texi +3 -0

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--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -271,6 +271,9 @@ supported using @command{-list_formats all} for Video4Linux2 devices.
 Some usage examples of the video4linux2 devices with avconv and avplay:

 @example
+# List supported formats for a video4linux2 device.
+avplay -f video4linux2 -list_formats all /dev/video0
+
 # Grab and show the input of a video4linux2 device.
 avplay -f video4linux2 -framerate 30 -video_size hd720 /dev/video0