Template:C792-Software: Difference between revisions

<mark>1.</mark> Update and upgrade your Raspberry Pi system (time required varies by country/region).

<mark>2.</mark> Enable the camera module (enabled by default on Raspberry Pi Bullseye OS).

*Edit the <code>/boot/firmware/config.txt</code> file (sudo privileges required):

sudo nano /boot/firmware/config.txt

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*Add the line:

dtoverlay=tc358743

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*Add the line if your shield support audio like C790 or C792：

dtoverlay=tc358743-audio

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*Add the line '''only if''': your device (e.g., C790/C792) supports a 22-pin connector with all 4 lanes connected, and the compute module has the '''CAM1 interface''' with all 4 lanes connected:

dtoverlay=tc358743,4lane=1

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*Use the following command to check the amount of memory allocated to the CMA heap:

dmesg | grep cma

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*The first line should look like:

pi@raspberrypi:~ $ dmesg | grep cma

[0.000000] cma: Reserved 256 MiB at 0x000000001ec00000

*If the reported CMA allocated memory is less than 96MB, edit the <code>/boot/cmdline.txt</code> file and add the following at the start of the line <span class="tb_red">(do not add a newline character)</span>:

cma=96M

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*Reboot the device. If everything works properly, you should see the <code>/dev/video0</code> device, and running the following command will show it is provided by Unicam:

v4l2-ctl --list-devices

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*After connecting all cables, power on the Raspberry Pi and enter the commands below：

pi@raspberrypi:~ $ ls /dev/video0

/dev/video0

*Several EDID editors are available on the market. You need to first create an edid.txt file (you can use the <code>command nano edid.txt</code> to create and edit the file), then copy the content below into the edid.txt file:

00ffffffffffff005262888800888888

1c150103800000780aEE91A3544C9926

*After the edid.txt file is created, execute the command <code>v4l2-ctl --set-edid=file=edid.txt --fix-edid-checksums</code> in the terminal, and you will see output similar to the following:

     pi@raspberrypi:~ $ v4l2-ctl --set-edid=file=edid.txt --fix-edid-checksums

*Detect the presence of HDMI signal input at present via command：

     pi@raspberrypi:~ $ v4l2-ctl --query-dv-timings

     Active width: 1280

*Use the following command to select UYVY (however, your application may override this setting):

v4l2-ctl -v pixelformat=UYVY

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*Check if the audio driver/sound card is available for ALSA:

     pi@raspberrypi:~ $ arecord -l.  

     **** List of CAPTURE Hardware Devices ****.  

*Install the GStreamer tools:

sudo apt install gstreamer1.0-tools

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*Check the GStreamer tool version:

pi@raspberrypi:~ $ gst-launch-1.0 --version

gst-launch-1.0 version 1.18.4

<mark>'''[Application Example — Using GStreamer to Record Video and Audio]'''</mark>  

# GStreamer v1.14 Command

gst-launch-1.0 v4l2src io-mode=5 ! video/x-raw, format=UYVY, framerate=25/1 ! v4l2h264enc output-io-mode=4 ! video/x-h264,profile=high ! h264parse ! queue ! matroskamux name=mux ! filesink location=foo.mkv alsasrc device=hw:1 ! audio/x-raw,rate=48000,channels=2 ! audioconvert ! avenc_aac bitrate=48000 ! aacparse ! queue ! mux.

<code>foo.mkv</code> is the output file.

If your GStreamer version is 1.8 or higher, you can try the following test command. Additionally, <code>alsasrc device=hw:1</code> refers to the sound card for TC358743; you can check this with the command <code>arecord -l</code>.

# Command to record video with audio（GStreamer 1.18.4）

gst-launch-1.0 -vvv v4l2src ! "video/x-raw,framerate=30/1,format=UYVY" ! v4l2h264enc extra-controls="controls,h264_profile=4,h264_level=13,video_bitrate=256000;" ! "video/x-h264,profile=high, level=(string)4.2" ! h264parse ! queue ! matroskamux name=mux ! filesink location=foo.mkv alsasrc device=hw:1 ! audio/x-raw,rate=48000,channels=2 ! audioconvert ! avenc_aac bitrate=48000 ! aacparse ! queue ! mux.

*Record video only:

gst-launch-1.0 -vvv v4l2src ! "video/x-raw,framerate=60/1,format=UYVY" ! v4l2h264enc extra-controls="controls,h264_profile=4,h264_level=13,video_bitrate=256000;" ! "video/x-h264,profile=high, level=(string)4.2" ! h264parse ! queue ! matroskamux name=mux ! filesink location=foo.mkv

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*Record video and audio (if your module supports audio):

gst-launch-1.0 -vvv v4l2src ! "video/x-raw,framerate=60/1,format=UYVY" ! v4l2h264enc extra-controls="controls,h264_profile=4,h264_level=13,video_bitrate=256000;" ! "video/x-h264,profile=high, level=(string)4.2" ! h264parse ! queue ! matroskamux name=mux ! filesink location=foo.mkv alsasrc device=hw:1 ! audio/x-raw,rate=48000,channels=2 ! audioconvert ! avenc_aac bitrate=48000 ! aacparse ! queue ! mux.

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Add the following two lines to the <code>/boot/firmware/config.txt</code> file:

dtoverlay=tc358743,4lane=1

dtoverlay=tc358743-audio

After adding the driver configuration, restart the Raspberry Pi for the changes to take effect. If the configuration is correct, execute the following command in the terminal: <code>ls /dev/video*</code>. The configuration is successful if video devices appear in the output:

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First, execute the command <code>nano 1080p60edid</code> in the terminal to create an EDID file for 1080p60Hz. The content of this file is as follows:

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Execute <code>nano testC7xx.sh</code> in the same directory to create a test script. The content of this file is as follows:

#!/bin/bash

MEDIADEVICE=-1

Execute <code>bash testC7xx.sh</code> directly in the terminal; the output is as follows:

pi@raspberrypi:~/Desktop $ bash testC7xx.sh  

Active width: 1920

:If you have installed the Raspberry Pi Desktop version, you can use ffplay to play YUV files directly.

ffplay -f rawvideo -video_size 1920x1080 -pixel_format bgr24 test.yuv  

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