Difference between revisions of "I.MX6 Framebuffer Overlay"
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=Instructions= | =Instructions= | ||
| − | * Display something on main Framebuffer (/dev/fb0), here the stream from an analog camera: | + | * Display something on main Framebuffer (''/dev/fb0''), here the stream from an analog camera: |
<pre class="apf"> | <pre class="apf"> | ||
# modprobe adv7280_tvin | # modprobe adv7280_tvin | ||
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# gst-launch-1.0 imxv4l2videosrc ! imxg2dvideosink & | # gst-launch-1.0 imxv4l2videosrc ! imxg2dvideosink & | ||
</pre> | </pre> | ||
| − | * Then activate auxiliary Framebuffer: | + | * Then activate auxiliary Framebuffer (''/dev/fb1''): |
<pre class="apf"> | <pre class="apf"> | ||
# echo 0 > /sys/class/graphics/fb1/blank | # echo 0 > /sys/class/graphics/fb1/blank | ||
Revision as of 13:01, 20 April 2017
Page under construction...
Informations on this page are not guaranteed !!
i.MX6 offers hardware composition of 2 framebuffers for video output. Here are the instructions on how to use it.
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Note: These instructions are only available on APF6 with 3.14 Freescale kernel (apf6legacy_defconfig) |
Tools
- you will need to compile and install following tools:
Instructions
- Display something on main Framebuffer (/dev/fb0), here the stream from an analog camera:
# modprobe adv7280_tvin # modprobe mxc_v4l2_capture # gst-launch-1.0 imxv4l2videosrc ! imxg2dvideosink &
- Then activate auxiliary Framebuffer (/dev/fb1):
# echo 0 > /sys/class/graphics/fb1/blank
- and put it some stuff on it:
# fb-test -f 1 &
- then you can set alpha/overlay parameters with fb_alpha tool:
- here we move overlay to (200,200):
# ./fb_alpha -x 200 -y 200
- same but with no transparency:
# ./fb_alpha -x 200 -y 200 -g 1 -a 255
- here we move overlay to (200,200):
