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by HermannSW
Wed Aug 14, 2019 1:17 pm
Forum: Camera board
Topic: v2.1 camera module, FSTROBE signal and pinnings
Replies: 3
Views: 1211

Re: v2.1 camera module, FSTROBE signal and pinnings

I cannot help with the v2 camera. But there is a more expensive (20$) version of ov5647 module (v1 camera) for Raspberry (you can get v1 clones for 3$ these days). That module exposes FREX (that was interesting to me) pin as well as STROBE: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=235...
by HermannSW
Tue Aug 13, 2019 9:02 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 531
Views: 153942

Re: Raw sensor access / CSI-2 receiver peripheral

Great work! Is it possible to acquire or read the frames into a numpy array using these aforementioned methods? I doubt that numpy is fast enough to do any meaningful work in the low time available ([email protected] or [email protected] leaves you 1ms/1.5ms of processing per frame only). But writing fram...
by HermannSW
Tue Aug 13, 2019 8:29 am
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 45
Views: 22602

Re: Cheap RC airplane with "outboard" Pi Zero and camera

Interestingly Stratolaunch seems to follow a similar concept, they have the worlds widest airplane (117m) now: https://spacenews.com/wp-content/uploads/2017/05/stratolaunch-rollout.jpg People have stretched this concept to the limit ! "Flex 9 is an airplane made out of 9 smaller airplanes connected...
by HermannSW
Sun Aug 11, 2019 9:19 pm
Forum: Camera board
Topic: kFPS videos from kEPS multiple exposure frames
Replies: 0
Views: 541

kFPS videos from kEPS multiple exposure frames

I just added new section to v1 camera global external shutter github repo, copied in here for convenience: https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter#kfps-videos-from-keps-multiple-exposure-frames Below 3000fps and 9000fps framerate videos are nice, double digit thousa...
by HermannSW
Sun Aug 11, 2019 2:38 pm
Forum: Camera board
Topic: HIGH SPEED 500-900FPS POSSIBLE??
Replies: 18
Views: 3171

Re: HIGH SPEED 500-900FPS POSSIBLE??

There is a new blog post with associated youtube videos from Robert Elder that explain every step needed from freshly flashed SD card to a working high framerate video capturing system, see this posting for more details: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=109137&p=1514950#p15149...
by HermannSW
Sat Aug 10, 2019 10:17 pm
Forum: Camera board
Topic: Is there any photo/video of flying rifle bullet done with v2 camera?
Replies: 25
Views: 3362

Re: Is there any photo/video of flying rifle bullet done with v2 camera?

Just ended up on this thread again, some updates: Global external shutter capturing works with Raspberry v1 camera (clone). And I captured 36m/s airsoft pistol pellets as well as in flight 109m/s airgun pellets, details here: https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter#...
by HermannSW
Sat Aug 10, 2019 9:32 pm
Forum: Networking and servers
Topic: Streaming 261Mbps or 464Mbps out over ethernet?
Replies: 3
Views: 608

Re: Streaming 261Mbps or 464Mbps out over ethernet?

I learned that iperf shows that even PI3B+ ethernet can do 318Mbps: https://news.ycombinator.com/item?id=20658147 I wanted to test raspividyuv traffic between PI3B and laptop. Unfortunately there is only one ethernet cable in vacation house. So I measured between PI3B with ethernet cable and PI2B wi...
by HermannSW
Sat Aug 10, 2019 3:35 pm
Forum: Camera board
Topic: Using ov9281, do I need an extra driver?
Replies: 5
Views: 320

Re: Using ov9281, do I need an extra driver?

Hi everyone, I want to use a camera by CSI, however the chip is ov9281. There is an Arducam 1MP monochrome global shutter camera with ov9281 sensor: https://www.uctronics.com/index.php/arducam-ov9281-mipi-camera-module-1mp-monochrome-global-shutter-camera.html You will need to use raspiraw and writ...
by HermannSW
Sat Aug 10, 2019 10:59 am
Forum: Camera board
Topic: Raspberry v1 camera global (external) shutter videos
Replies: 40
Views: 4599

Re: Raspberry v1 camera global (external) shutter videos

I just looked at the 5MP sample for rolling shutter effect I used in Information section of github repo: https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter#introduction I realized that the image provides the propeller rotation direction. Camera scans lines from top to bottom. ...
by HermannSW
Fri Aug 09, 2019 8:07 pm
Forum: Networking and servers
Topic: Streaming 261Mbps or 464Mbps out over ethernet?
Replies: 3
Views: 608

Re: Streaming 261Mbps or 464Mbps out over ethernet?

Does this help? https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=245785 Yes, even the lower 880Mbps value seems sufficient. No idea what the network overhead of a camera could be. There is no overhead needed (besides ethernet/TCP/IP), just the raw frame data. Somebody with a Pi4 and camera c...
by HermannSW
Fri Aug 09, 2019 10:27 am
Forum: Camera board
Topic: Hardware camera sync pulses
Replies: 62
Views: 13768

Re: Hardware camera sync pulses

There might be easier ways to determine the the time it takes to capture a single line with v1 or v2 camera. I used logic analyzer and measured the hardware camera sync pulses. The length of high signal for mode 7 640x480 is constant, regardless of framerate (the framerate affects only the signal lo...
by HermannSW
Thu Aug 08, 2019 4:57 pm
Forum: Networking and servers
Topic: Streaming 261Mbps or 464Mbps out over ethernet?
Replies: 3
Views: 608

Streaming 261Mbps or 464Mbps out over ethernet?

I just answered question on hacker news on whether streaming out high framerate Raspberry camera video over 10G ethernet would be possible: https://news.ycombinator.com/item?id=20645958 Even new Pi4 has only Gigabit ethernet, and Pi3B has Gigabit over USB2.0 which is 300Mbps. In my answer I calculat...
by HermannSW
Wed Aug 07, 2019 3:08 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 531
Views: 153942

Re: Raw sensor access / CSI-2 receiver peripheral

Robert Elder did a blog post some days ago: "A Guide to Recording 660FPS Video On A $6 Raspberry Pi Camera" http://blog.robertelder.org/recording-660-fps-on-raspberry-pi-camera/ There was an intensive discussion on hackernews on this: https://news.ycombinator.com/item?id=20627574 He explains (in blo...
by HermannSW
Tue Aug 06, 2019 5:59 am
Forum: Camera board
Topic: Noir camera V1.3 schematic
Replies: 1
Views: 162

Re: Noir camera V1.3 schematic

by HermannSW
Mon Aug 05, 2019 2:42 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 22
Views: 2383

Re: using raspistill to only display red pixels in Real Time

Then enable redfilter for rgba video format as well, and compare performance of both gstreamer pipelines end to end. No need for that, just learned (again) that raspivid encoding is I420 as well. With raspivid use of h264parse and (hardware accelerated) omxh264dec are needed, besides that redfilter...
by HermannSW
Mon Aug 05, 2019 1:20 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 22
Views: 2383

Re: using raspistill to only display red pixels in Real Time

It was no bug in redfilter gstreamer plugin, it was just total overload of gstreamer pipeline. No change was needed to get "real time" 28fps display with this command (60fps mode 7 raspividyuv, gstreamer specify 30fps): $ raspividyuv -t 0 -md 7 -w 640 -h 480 -fps 60 -n -o - | GST_PLUGIN_PATH=/usr/lo...
by HermannSW
Mon Aug 05, 2019 8:10 am
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 22
Views: 2383

Re: using raspistill to only display red pixels in Real Time

I just synced redfilter on Ubuntu 18.04.2 and built it. One warning on assignment used as truth value, and one warning on using %lld for output buf->pts timestamp (no warnings on Raspbian I used for development), but the plugin gets build and works. <comment>compiler warnings fixed with this commit ...
by HermannSW
Mon Aug 05, 2019 7:06 am
Forum: General discussion
Topic: Suggestions for a cheap, wireless, and reliable Keyboard/Mouse?
Replies: 23
Views: 779

Re: Suggestions for a cheap, wireless, and reliable Keyboard/Mouse?

I do use a Logitech wireless keyboard and mouse at home for laptop, I think it did cost 25$. When travelling I use a really cheap wireless keyboard with builtin touch (5$ on aliexpress). The touch is quite useful since my 7" DPMI lcd does not have touch. Even at home I run my PIs with either this ke...
by HermannSW
Sun Aug 04, 2019 9:57 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 22
Views: 2383

Re: using raspistill to only display red pixels in Real Time

The redfilter works with this commit https://gitlab.freedesktop.org/HermannSW/gst-template/commit/28ed2b630a54de54466f2a5fc584468a999ab41d But there is a bug in updating gstreamer output. The frames get processed with 90fps without any difficulty (nanosecond timestamps, deltas by >11 million ns): .....
by HermannSW
Sat Aug 03, 2019 8:02 pm
Forum: Camera board
Topic: Hardware camera sync pulses
Replies: 62
Views: 13768

Re: Hardware camera sync pulses

What I reported was for a Raspberry Pi 2B. Since I more often work with Pi 3A+ I wanted to enable hardware camera sync pulses with DPMI lcd for that Pi as well. This diff provides the pulses on GPIO42 for software use as described in previous posting: [email protected]:~ $ diff dt-blob.dts dt-blo...
by HermannSW
Sat Aug 03, 2019 1:26 pm
Forum: Camera board
Topic: Hardware camera sync pulses
Replies: 62
Views: 13768

Re: Hardware camera sync pulses

I'm not sure what you're expecting us to do with that. The question is what techmasterjoe has done to GPIO41 on his CM. I was just surprised that all BANK0 GPIOs are used by DPMI interface -- unrelated to CM question. So none of the GPIOs could be used for sending HW sync pulses to the outside to t...
by HermannSW
Fri Aug 02, 2019 9:10 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 22
Views: 2383

Re: using raspistill to only display red pixels in Real Time

I looked into appsrc/appsrc-launch5.c to see how to get access to the frame data. This is the small diff (besides including <string.h> at top) that allows to see 640*480*1.5=460800 bytes buffer size, and get READWRITE memory in data for manipulating the frame: @@ -236,8 +237,16 @@ gst_red_filter_cha...
by HermannSW
Fri Aug 02, 2019 3:54 pm
Forum: Official Foundation Display
Topic: Screen for Raspberry Pi
Replies: 9
Views: 1815

Re: Screen for Raspberry Pi

I have to admit that I'm quite curious about the camera you're using. Care to share the make and model? One of those cheap (now <4$) v1 camera clones (not NoIR): https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=81500&p=1507039#p1507039 with self added M12 mount: https://www.raspberrypi.org/f...
by HermannSW
Fri Aug 02, 2019 3:36 pm
Forum: Camera board
Topic: Hardware camera sync pulses
Replies: 62
Views: 13768

Re: Hardware camera sync pulses

Download and build raspigpio from https://github.com/RPi-Distro/raspi-gpio Thanks, seems to be a really useful tool. This is output for Pi3A+ with DPMI display attached: [code][email protected]:~/raspi-gpio $ ./raspi-gpio get BANK0 (GPIO 0 to 27): GPIO 0: level=1 fsel=6 alt=2 func=PCLK GPIO 1: l...

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