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With GST_V4L2_USE_LIBV4L2=1, my laptop's touchpad shows up as a video source device in gst-device-monitor, but attempting to stream from it fails because the device doesn't actually support any video formats. name : Synaptics RMI4 Touch Sensor class : Video/Source caps : video/x-raw, format=(string)I420, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1; video/x-raw, format=(string)YV12, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1; video/x-raw, format=(string)BGR, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1; video/x-raw, format=(string)RGB, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1; properties: udev-probed = true device.bus_path = /sys/devices/rmi4-00/rmi4-00.fn54/video4linux/v4l-touch0 sysfs.path = /sys/devices/rmi4-00/rmi4-00.fn54/video4linux/v4l-touch0 device.subsystem = video4linux device.product.name = "Synaptics\ RMI4\ Touch\ Sensor" device.capabilities = :capture: device.api = v4l2 device.path = /dev/v4l-touch0 v4l2.device.driver = rmi4_f54 v4l2.device.card = "Synaptics\ RMI4\ Touch\ Sensor" v4l2.device.bus_info = rmi4:rmi4-00.fn54 v4l2.device.version = 265480 (0x00040d08) v4l2.device.capabilities = 2501902337 (0x95200001) v4l2.device.device_caps = 354418689 (0x15200001) gst-launch-1.0 v4l2src device=/dev/v4l-touch0 ! ... v4l2-ctl -d /dev/v4l-touch0 --list-formats reports: ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video Capture Pixel Format: 'TD16' Name : 16-bit signed deltas Index : 1 Type : Video Capture Pixel Format: 'TD08' Name : 8-bit signed deltas Index : 2 Type : Video Capture Pixel Format: 'TU16' Name : 16-bit unsigned touch data https://bugzilla.gnome.org/show_bug.cgi?id=789197 |
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directsound | ||
oss | ||
oss4 | ||
osxaudio | ||
osxvideo | ||
v4l2 | ||
waveform | ||
ximage | ||
Makefile.am | ||
meson.build |