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2015-09-29-v4l-and-gstreamer.markdown

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v4l and gstreamer
2015-09-29 11:05:58 +0800
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v4l gstreamer ipu csi camera

1. V4L Test commmand

1.1 Overlay

root@freescale ~$ cd /unit_tests/
root@freescale /unit_tests$ /unit_tests/mxc_v4l2_overlay.out -iw 720 -ih 480 -it 0 -il 0 -ow 720 -oh 480 -ot 50 -ol 200

1.2 TVIN

root@freescale ~$ cd /unit_tests/

root@freescale /unit_tests$ /unit_tests/mxc_v4l2_tvin.out -ow 720 -oh 480 -ot 20 -ol 20 -c 10 -m 0 -tb -f YUYV
root@freescale /unit_tests$ /unit_tests/mxc_v4l2_tvin.out -ow 720 -oh 480 -ot 20 -ol 20 -c 10 -m 0 -tb -f UYVY

root@freescale /unit_tests$ /unit_tests/mxc_v4l2_tvin.out -ow 720 -oh 480 -ot 20 -ol 20 -c 10 -m 0 -tb -f NV12

root@freescale /unit_tests$ /unit_tests/mxc_v4l2_tvin.out -ow 720 -oh 480 -ot 20 -ol 20 -c 10 -m 0 -tb -f NV12

2. GStreamer Test Command

1. Display videotest pattern

$ gst-launch -v videotestsrc ! mfw_v4lsink

2. Video loopback

2.1 Single Camera

$ gst-launch -v mfw_v4lsrc ! mfw_v4lsink

$ gst-launch -v mfw_v4lsrc device=/dev/video0 ! mfw_v4lsink disp-width=720 disp-height=480

$ gst-launch -v mfw_v4lsrc device=/dev/video0 ! video-sink="mfw_isink axis-top=0 axis-left=0 disp-width=720 disp-height=420"

$ gst-launch -v mfw_v4lsrc device=/dev/video0 ! mfw_isink disp-width=720 disp-height=480

2.1 Single TV Decoder

$ gst-launch -v tvsrc ! mfw_v4lsink

$ gst-launch -v tvsrc ! mfw_isink

$ gst-launch -v tvsrc ! mfw_v4lsink axis-top=50 axis-left=100  disp-width=720 disp-height=480

$ gst-launch -v tvsrc device=/dev/video0 ! mfw_v4lsink axis-top=50 axis-left=100  disp-width=720 disp-height=480