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by 6by9
Thu Feb 27, 2020 10:45 am
Forum: General discussion
Topic: What is the maximum monitors supported by Raspberry Pi?
Replies: 7
Views: 331

Re: What is the maximum monitors supported by Raspberry Pi?

DisplayLink style USB display adapters may work, although if they use the Pi onboard 3D block for composition then your overall desktop is limited to 7680x7680 on Pi4 (2048x2048 on Pi3).
by 6by9
Thu Feb 27, 2020 10:36 am
Forum: Troubleshooting
Topic: RPi4 mpv with hardware decoding: failed to add service - already in use
Replies: 4
Views: 115

Re: RPi4 mpv with hardware decoding: failed to add service - already in use

V4L2 decoding for H264 IS supported on the Pi4. (H264, MPEG4, H263, and MPEG2 decoding is supported on earlier Pis via V4L2). DRM and KMS are the default on Pi4, and are optional on Pi0-3. wm4 used to be quite involved in getting things working on the Pi, but now seems to be discarding it as a platf...
by 6by9
Wed Feb 26, 2020 9:59 pm
Forum: Camera board
Topic: Arducam IMX135 with RPi Zero problem
Replies: 2
Views: 57

Re: Arducam IMX135 with RPi Zero problem

As that module is made by Arducam and not Raspberry Pi, please don't expect much support here. Arducam should support their own products. However I suspect that it is just that you haven't installed wiringpi which is used for the GPIO manipulation. "sudo apt install wiringpi" may resolve your issue,...
by 6by9
Wed Feb 26, 2020 4:11 pm
Forum: Camera board
Topic: Tablet Camera
Replies: 1
Views: 43

Re: Tablet Camera

Do you have a pinout for that connector? Do you have any information on what the sensor actually is? Do you have a datasheet for that sensor, or is there a driver already in the Linux kernel? If the answer to any of those questions is no, then broadly forget about it. There is no standard connector ...
by 6by9
Wed Feb 26, 2020 3:54 pm
Forum: Camera board
Topic: Raspberry PI cam Chinese edition
Replies: 6
Views: 133

Re: Raspberry PI cam Chinese edition

If you want to know what GPIO the LED is connected to, the official source is https://github.com/raspberrypi/firmware/blob/master/extra/dt-blob.dts and look for the CAMERA_0_LED property for your particular board variant. If it is listed as external, then it is on the GPIO expander. Internal is the ...
by 6by9
Wed Feb 26, 2020 2:21 pm
Forum: Beginners
Topic: Full KMS OpenGL
Replies: 4
Views: 93

Re: Full KMS OpenGL

Thanks for the answer, will the driver be available in updates or OS will it need to be reinstalled? It'll be available via a bump to the raspberrypi-kernel package at some point in the future. It'll be based on the Linux 5.4 release rather than 4.19 though, so there's going to be a fair chunk of t...
by 6by9
Wed Feb 26, 2020 2:19 pm
Forum: Camera board
Topic: MMAL camera control callback function with 2 cameras
Replies: 2
Views: 58

Re: MMAL camera control callback function with 2 cameras

If you're not doing anything extra in the callback, then reusing the default one won't do any harm. It only works on local data, no global data. If you want to instance specific stuff, then you can use port->userdata to allow a lookup back to a struct of your choosing which the callback can modify. ...
by 6by9
Wed Feb 26, 2020 1:25 pm
Forum: Camera board
Topic: Raspberry PI cam Chinese edition
Replies: 6
Views: 133

Re: Raspberry PI cam Chinese edition

Provide a link to the Aliexpress page, otherwise we're having to guess. The most common OV5647 with controllable IR cut filter is the Waveshare one - https://www.waveshare.com/rpi-ir-cut-camera.htm Read the wiki for controlling the IR cut filter. You can generally control the camera LED line via sof...
by 6by9
Wed Feb 26, 2020 1:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using GPIO of smsc9512 for more LEDs ?
Replies: 5
Views: 1937

Re: Using GPIO of smsc9512 for more LEDs ?

If someone is looking for solutions, there is this: http://patchwork.ozlabs.org/patch/347785/ and this: https://github.com/saschahauer/barebox/blob/master/drivers/net/usb/smsc95xx.c Welcome to the forums, however please be aware that: a) This post was started 7 years ago, and the last post is from ...
by 6by9
Wed Feb 26, 2020 1:00 pm
Forum: Graphics, sound and multimedia
Topic: RPI and HDMI to CSI-2 Audio Video Capture or Stream?
Replies: 4
Views: 226

Re: RPI and HDMI to CSI-2 Audio Video Capture or Stream?

If your source is insisting on producing 1080p60, then you are stuck. There is no way of getting the data into a standard Pi at that rate. (The Compute Module can if you use an Auvidea B102). Run "v4l2-ctl --log-status" and it should print out a load of status, including an entry "Lanes needed: X". ...
by 6by9
Wed Feb 26, 2020 12:10 pm
Forum: Beginners
Topic: Full KMS OpenGL
Replies: 4
Views: 93

Re: Full KMS OpenGL

The first version of the patch set went out to the Linux mailing lists on Monday - https://lists.freedesktop.org/archives/dri-devel/2020-February/256515.html There are a number of rough edges still that need to be resolved, and the expected back and forth on the lists for code review (only the clock...
by 6by9
Wed Feb 26, 2020 11:59 am
Forum: Camera board
Topic: Hardware camera sync pulses
Replies: 108
Views: 21755

Re: Hardware camera sync pulses

The main camera stack and the rawcam component use different interrupt handler implementations, and the sync pulse stuff is only in the main camera stack one. rawcam doesn't have need to use check for an LED pin as it is disjoined from the main stack, so making that link would require a bit of thoug...
by 6by9
Tue Feb 25, 2020 5:02 pm
Forum: General discussion
Topic: Rpi 3 V3D 720p?
Replies: 7
Views: 200

Re: Rpi 3 V3D 720p?

X chooses display mode independent of the console for reasons best known to itself. The firmware can influence the console via the video= line in the kernel command line, but not to X without rewriting files on the ext4 partition. As andrum99 says, use the Screen Configuration Tool (arandr) to set i...
by 6by9
Tue Feb 25, 2020 2:47 pm
Forum: Beginners
Topic: 3D Shutter Glasses Sync
Replies: 3
Views: 88

Re: 3D Shutter Glasses Sync

Please don't double post - viewtopic.php?f=38&t=266090&p=1616911
I'd replied on the other thread (now locked).
by 6by9
Tue Feb 25, 2020 2:45 pm
Forum: Troubleshooting
Topic: I2C device detected with i2cdetect, still getting "No I2C device at address" error
Replies: 7
Views: 225

Re: I2C device detected with i2cdetect, still getting "No I2C device at address" error

If you read the I2C spec, addresses 0x00-0x03 and 0x78-0x7f are reserved.
https://www.nxp.com/docs/en/user-guide/UM10204.pdf page 70, section 3.1.12 "Reserved addresses".
0x03 is "reserved for future purposes".
by 6by9
Tue Feb 25, 2020 2:41 pm
Forum: Troubleshooting
Topic: RPi4 mpv with hardware decoding: failed to add service - already in use
Replies: 4
Views: 115

Re: RPi4 mpv with hardware decoding: failed to add service - already in use

I am running archlinux arm 32bit on my rpi4B and trying to launch mpv with hardware decoding in drm mode. However, no matter which settings combination I try in boot/config.txt, all I'm getting is ➜ ~ mpv --drm-mode=highest --hwdec=mmal --vo=rpi /storage/StarTrek.Picard.S01.TeamNotDead.1080p/StarTr...
by 6by9
Tue Feb 25, 2020 2:29 pm
Forum: Advanced users
Topic: Timeline on raspbian kernel updates?
Replies: 2
Views: 185

Re: Timeline on raspbian kernel updates?

5.6 is not a LTS release , therefore won't ever become a Raspbian kernel. It exists in our Linux Github tree already as rpi-5.6.y , but won't have that much testing. You can always build your own kernel from there following the provided instructions . 5.4 is an LTS kernel, and is in the process of b...
by 6by9
Tue Feb 25, 2020 11:48 am
Forum: Graphics, sound and multimedia
Topic: 3D Shutter Glasses Sync
Replies: 2
Views: 96

Re: 3D Shutter Glasses Sync

Not that I'm aware of. The Pi does support driving HDMI 3D displays (projector or TV), and then the display will drive the glasses.
by 6by9
Mon Feb 24, 2020 3:51 pm
Forum: General discussion
Topic: Wide angle camera module picture quality questionable.
Replies: 8
Views: 246

Re: Wide angle camera module picture quality questionable.

There is no wide angle official camera. Although I own officials cameras, I have to buy chinese variants because they have a lens mount with a lot of choice. There are third party wide angle variants from Pimoroni/Pi hut also. It is possible to buy an M12 plastic lens housing that can be mounted ov...
by 6by9
Mon Feb 24, 2020 12:41 pm
Forum: Camera board
Topic: Avconv beginner issues
Replies: 2
Views: 93

Re: Avconv beginner issues

FFmpeg vs libav - https://en.wikipedia.org/wiki/Libav

Many avconv command lines will work with FFmpeg without change.
by 6by9
Mon Feb 24, 2020 12:39 pm
Forum: General discussion
Topic: Wide angle camera module picture quality questionable.
Replies: 8
Views: 246

Re: Wide angle camera module picture quality questionable.

I'd be suspicious that you have a version of the sensor with no infra-red filter fitted, what is often termed the NoIR version of the sensor. All 3 colour channels on the sensor are sensitive to IR, which is why one is normally fitted. You may be able to add your own IR filter to the front, but I do...
by 6by9
Sat Feb 22, 2020 10:54 am
Forum: General discussion
Topic: Pi 4 second monitor blank
Replies: 2
Views: 73

Re: Pi 4 second monitor blank

Have you disabled vc4-fkms-v3d in config.txt? If so, why?
That would do it as then the two framebuffers become totally independent, and nothing is writing to the second one.
by 6by9
Fri Feb 21, 2020 3:45 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 125
Views: 175918

Re: Both 4k and portrait mode

yushuiqiang2008 wrote:
Fri Feb 21, 2020 8:18 am
I have a lcd screen with resolution 3840*2400, would you help me ?
Please don't double post - viewtopic.php?f=38&t=265767
by 6by9
Fri Feb 21, 2020 8:00 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to get video from CAMERA connector on Raspberry Pi 3 with CSI standard inputs ???
Replies: 49
Views: 5972

Re: How to get video from CAMERA connector on Raspberry Pi 3 with CSI standard inputs ???

when i run ''i2cdetect -y 0" I got a result as this picture. I run "raspi-gpio get" and I see: I2c0 is connected to Pin 28,29 of raspi, it is corrected. I asked you to quote the output of "raspi-gpio get" for good reason. PIns 28 & 29 is INCORRECT for a Pi3. The camera connector is attached to GPIO...

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