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Mv series camera appnotes 4 rpi (view source)
Revision as of 16:28, 14 April 2022
, 16:28, 14 April 2022→Save image to file
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=3088,height=2064</code>
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=3088,height=2064</code>
===== Frame rate statistics =====
In streaming mode, the following commands can be used for frame rate statistics.
In streaming mode, the following commands can be used for frame rate statistics.
<code>./yavta -c1 -Fy8-3104x2064.yuv --skip 0 -f Y8 -s 3088x2064 /dev/video0</code>
<code>./yavta -c1 -Fy8-3104x2064.yuv --skip 0 -f Y8 -s 3088x2064 /dev/video0</code>
PS.This y8 file can be used with this player: [https://yuv-player-deluxe.software.informer.com/2.6/ YUV Displayer Deluxe].
PS. This y8 file can be used with this player: [https://yuv-player-deluxe.software.informer.com/2.6/ YUV Displayer Deluxe].
Since the memory requested by Raspberry Pi for the image, the width is 32-align and the height is 16-align, the 3088*2064 image will be saved as 3104*2064 size.
Since the memory requested by Raspberry Pi for the image, the width is 32-align and the height is 16-align, the 3088*2064 image will be saved as 3104*2064 size.
==== Trigger mode ====
===== Set ROI =====
Take MV-MIPI-IMX178M, 3088*2064 as an example.
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=3088,height=2064</code>
===== Software trigger mode =====
====== Set mode ======
<code>v4l2-ctl --set-ctrl <small>trigger_mode=1</small></code>
<code>v4l2-ctl --set-ctrl <small>trigger_src=0</small></code>
====== Start acquisition ======
<code>v4l2-ctl --set-fmt-video=width=3088,height=2064,pixelformat=GREY --stream-mmap --stream-count=5 --stream-to=y8-3104x2064.yuv</code>
====== Perform soft trigger operation ======
In other shell terminals, you can execute the following command multiple times for multiple triggers.
<code>v4l2-ctl --set-ctrl <small>soft_trgone=1</small></code>
Notes: The first image triggered in this way cannot be output and saved. ''I haven't found out why.''
===== Hardware trigger mode =====
The following is an example of using Raspberry Pi GPIO21 as an trigger source with rising edge trigger.
You can use the [[Mv mipi i2c.sh user guide|mv_mipi_i2c.sh]] script for other trigger parameter setting.
====== Hardware Connection ======
(TODO picture)
====== Set mode ======
<code>v4l2-ctl --set-ctrl <small>trigger_mode=1</small></code>
<code>v4l2-ctl --set-ctrl <small>trigger_src=1</small></code>
====== Start acquisition ======
<code>v4l2-ctl --set-fmt-video=width=3088,height=2064,pixelformat=GREY --stream-mmap --stream-count=5 --stream-to=y8-3104x2064.yuv</code>
====== Perform hardware trigger operation ======
<code>python gpio_trigger.py</code>
Note: script [https://github.com/veyeimaging/mvcam_raspberrypi/tree/main/mv_tools_rpi link].
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