Changes between Version 7 and Version 8 of venice/multimedia

Timestamp:

07/11/2023 10:44:53 PM (10 months ago)

Author:

Tim Harvey

Comment:

added additional capture example steps

venice/multimedia

@@ -200 +200 @@
 
 Examples:
- * capture 640x480 RAW8 at 10fps from IMX219 and display to framebuffer using gstreamer
-{{{#!bash
-# install gstreamer
-apt update
-apt-get install gstreamer1.0-x gstreamer1.0-tools \
-gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
-gstreamer1.0-libav gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 v4l-utils
-# using glvideosink will render 'within' GUI
-gst-launch-1.0 videotestsrc ! autovideosink
+ * configure Linux video pipeline for 640x480 RAW8 from IMX219 '''(you must do this in Linux prior to capturing from the video device)
+{{{#!bash
 # find media device whos model is 'imx-media'
 MDEV=$(for i in `ls -d /sys/bus/media/devices/media*`; do if [ "$(cat $i/model)" = "imx-media" ]; then cat $i/dev | cut -d: -f2; fi; done)
@@ -218 +211 @@
 media-ctl --device /dev/media$MDEV -v -V "'imx219 2-0010':0 [fmt:SRGGB8/640x480 field:none]"
 media-ctl --device /dev/media$MDEV -v -V "'csi':0 [fmt:SRGGB8/640x480 field:none]"
+}}}
+ * configure video format and capture a raw frame with v4l2-ctl '''(must configure Linux video pipeline first)'''
+{{{#!bash
+v4l2-ctl --device /dev/video0 --set-fmt-video=pixelformat=RGGB
+v4l2-ctl --device /dev/video0 --stream-mmap --stream-to=frame.raw --stream-count=1
+# install imagemagic for convert tool
+apt-get install imagemagic
+convert -size 640x480 -depth 8 gray:frame.raw frame.png
+}}}
+ * capture 640x480 RAW8 at 10fps from IMX219 and display to framebuffer using gstreamer '''(must configure Linux video pipeline first)'''
+{{{#!bash
+# install gstreamer
+apt update
+apt-get install gstreamer1.0-x gstreamer1.0-tools \
+gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
+gstreamer1.0-libav gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 v4l-utils
 # stream 640x480@30fps
 gst-launch-1.0 v4l2src device=/dev/video$VDEV ! video/x-bayer,format=rggb,width=640,height=480,framerate=10/1 ! bayer2rgb ! fbdevsink
 }}}
- - bayer2rgb can't keep up at 640x480@30fps and uses about 25% of the CPU when converting 640x480@10fps (as shown above)
- - bayer2rgbneon uses appx 10% of CPU when converting 640x480@30fps
+  - use 'glvideosink' if you want to render 'within' an OpenGL GUI or 'fbdevsink' if you want to render to the framebuffer device
+  - bayer2rgb can't keep up at 640x480@30fps and uses about 25% of the CPU when converting 640x480@10fps (as shown above)
+  - bayer2rgbneon uses appx 10% of CPU when converting 640x480@30fps