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by HermannSW
Tue Jun 02, 2020 9:42 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

RoboRob wrote:
Tue Jun 02, 2020 8:10 am
what can I use to play the ppm files?
eog or gimp or any other image viewer
by HermannSW
Tue Jun 02, 2020 7:19 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

It did not work, only 1.6KB: -rw-r--r-- 1 pi pi 1,6K jun 2 08:48 out.0001.ppm.d.png You need to install netpbm tools, they are used in raw2ogg2anim: sudo apt-get install netpbm In the meantime you can view the 36MB .ppm file that was converted from the captured raw frame by dcraw, see raw2ogg2anim s...
by HermannSW
Tue Jun 02, 2020 7:02 am
Forum: Camera board
Topic: New raspistill "Figure of Merit (FoM)" feature
Replies: 20
Views: 951

Re: New raspistill "Figure of Merit (FoM)" feature

I took a timelapse of moon every second, with this command, stopped it after 34min with CTRL-C: 🍓 time userland/build/bin/raspistill -fw -ISO 800 -o tst.%04d.jpg -tl 1000 -t 3600000 I converted the captured frames with this command to a video, playing 1min capture in 1s: 🍓 time ffmpeg -r 60 -i tst.%...
by HermannSW
Tue Jun 02, 2020 6:32 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

With raspiraw you need to run "camera_i2c" first, after reboot and after any use of normal raspistill/raspivid. Then it should take as many seconds as you specified (the 1st argument of long_exposure is specified in microseconds). This should take slightly more than 60s: time long_exposure 60000000 ...
by HermannSW
Mon Jun 01, 2020 10:04 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

In this posting I described how to remotely focus HQ camera lens on the moon with help of raspistill's "--focus": https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=273804&p=1671536#p1671536 https://stamm-wilbrandt.de/en/forum/20200601_225119.browser.jpg Moon does move 360° in 24h, that is 15° ...
by HermannSW
Mon Jun 01, 2020 9:11 pm
Forum: Camera board
Topic: New raspistill "Figure of Merit (FoM)" feature
Replies: 20
Views: 951

Re: New raspistill "Figure of Merit (FoM)" feature

Built on raspi2png I created a poor man remote FoM solution (telepi gets further and further behind, the longer it runs). On the Pi I use running webserver, in /var/www/html I use this command and index.html for capturing: 🍓 while true; do raspi2png ; cp snapshot.png display.png; sleep 3; done ^C 🍓 ...
by HermannSW
Mon Jun 01, 2020 7:10 pm
Forum: Advanced users
Topic: Arducam not working, mmal no data received from sensor error?
Replies: 5
Views: 137

Re: Arducam not working, mmal no data received from sensor error?

That is a normal ov5647 v1 camera clone. Just looked into Troubleshootig section: https://www.raspberrypi.org/documentation/raspbian/applications/camera.md And you followed the last step mentioned there in starting this forum thread. I only once had problem with v1 camera, and it was not detected. I...
by HermannSW
Mon Jun 01, 2020 6:56 pm
Forum: Camera board
Topic: Can any of the official camera modules be potted in electronics potting epoxy?
Replies: 8
Views: 318

Re: Can any of the official camera modules be potted in electronics potting epoxy?

Then again, having 8MP could be pretty cool, as that is a pretty high res picture. 5MP of v1 camera is not that bad either (2592x1944 vs. 3280x2464). In case a v1 camera remains without use, you can try this, only v1 camera allows for that, not v2 camera: https://github.com/Hermann-SW/Raspberry_v1_...
by HermannSW
Mon Jun 01, 2020 6:39 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

You missed the export statement: export PATH=~/raspiraw:~/raspiraw/tools:~/dcraw:$PATH long_exposure tool can be executed when ~/raspiraw/tools is in $PATH: 🍓 long_exposure format: long_exposure us [#frames] 🍓 which long_exposure /home/pi/raspiraw/tools/long_exposure 🍓 I did put that into my ~/.bash...
by HermannSW
Mon Jun 01, 2020 2:56 pm
Forum: Camera board
Topic: ROI zoom and crop
Replies: 2
Views: 86

Re: ROI zoom and crop

In addition defining a ROI does not seem to increase the framerate when one would hope that the sensor has less data to capture and transmit. I cannot tell about picamera, but with raspiraw you get exactly that: halve vertical resolution, and get (roughly) double framerate https://www.raspberrypi.o...
by HermannSW
Mon Jun 01, 2020 2:50 pm
Forum: Camera board
Topic: HQ Camera specs vs. sensor specifications
Replies: 12
Views: 363

Re: HQ Camera specs vs. sensor specifications

Does the HQ Camera support the STROBE signal? With this function, I could easily integrate a longer period of time (e.g. one second) with sensor going ON and OFF periodically (e.g. 40 ms ON, 10 ms OFF) without actually having any stroboscopical flash, and if I knew exact timing of the ON/OFF signal...
by HermannSW
Mon Jun 01, 2020 2:40 pm
Forum: Camera board
Topic: Pi microscopic camera?
Replies: 2
Views: 123

Re: Pi microscopic camera?

Is there a camera appropriate for use as a microscope on a pi? I want to build a pi cam that can be used to assist in making Jewlrey there are pre made cameras out there that cost thousands of dollars because they are for such a niche market, EG Jewlrey and electronics repair. Hope this is the righ...
by HermannSW
Mon Jun 01, 2020 2:35 pm
Forum: Camera board
Topic: Can any of the official camera modules be potted in electronics potting epoxy?
Replies: 8
Views: 318

Re: Can any of the official camera modules be potted in electronics potting epoxy?

Why not buy 10 cheap 3$ v1 camera clones
https://www.aliexpress.com/wholesale?is ... roupsort=1
and just try out? 3$ loss per bad experiment is better than 25$ for v2 camera ...
by HermannSW
Mon Jun 01, 2020 2:32 pm
Forum: Advanced users
Topic: Arducam not working, mmal no data received from sensor error?
Replies: 5
Views: 137

Re: Arducam not working, mmal no data received from sensor error?

Your subject line says "Arducam", and it gets detected.
Which Arducam camera do you have?
This one?
https://www.uctronics.com/arducam-8-mp- ... ry-pi.html
by HermannSW
Mon Jun 01, 2020 2:27 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

Nevertheless this worked instead: git clone https://github.com/Hermann-SW/raspiraw.git Thanks, I corrected the steps in previous posting. Problem though: no long_exposure created after make (or buildme ) was executed... :cry: You missed the "git checkout" command that switches to long_exposure bran...
by HermannSW
Mon Jun 01, 2020 2:22 pm
Forum: Camera board
Topic: HQ Camera: switch off metering & noise reduction
Replies: 19
Views: 600

Re: HQ Camera: switch off metering & noise reduction

See the first steps in raw2ogg2anim bash script, before cration of the .ogg video:
https://github.com/Hermann-SW/raspiraw/ ... w2ogg2anim
by HermannSW
Sun May 31, 2020 9:02 pm
Forum: Camera board
Topic: HQ Camera: switch off metering & noise reduction
Replies: 19
Views: 600

Re: HQ Camera: switch off metering & noise reduction

Well, I tried it as well with raspiraw but that seems to have a limitation on the shutter speed which can be 65535 micro-seconds as an upper limit. Far to low to make it useful for astro purposes... I implemented long exposures up to 239s for raspiraw, that way you can eliminate any GPU processing ...
by HermannSW
Sun May 31, 2020 8:44 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 623
Views: 196972

Re: Raw sensor access / CSI-2 receiver peripheral

I am done with raspiraw long exposure work. With this commit new tool/long_exposure is available: https://github.com/Hermann-SW/raspiraw/commit/650d2fc6260990df8042b12ea6ab1b961198a623 Currently it is on my raspiraw fork long_exposure branch: g̶i̶t̶ ̶c̶l̶o̶n̶e̶ ̶g̶i̶t̶@̶g̶i̶t̶h̶u̶b̶.̶c̶o̶m̶:̶H̶e̶r̶m...
by HermannSW
Sun May 31, 2020 8:01 am
Forum: Camera board
Topic: 10 FPS Jpg Stream
Replies: 4
Views: 187

Re: 10 FPS Jpg Stream

What I now did to aleviate the situation is program a small python script using picamera which uses the video port and can get up to 30 fps (much higher than the requirements). I tried that program -- as always picamera cannot reach the framerates "raspivid" or "raspistill --timelapse" can provide....
by HermannSW
Sat May 30, 2020 9:48 pm
Forum: General programming discussion
Topic: Pi4B GPU GFlops comparable to Intel i7 FPU?
Replies: 1
Views: 183

Re: Pi4B GPU GFlops comparable to Intel i7 FPU?

Getting py-videocore6 running was rough. I followed the instructions for Installation: https://github.com/Idein/py-videocore6#installation Starting tests failed with error "libf77blas.so.3: cannot open shared object file: No such file or directory". I did follow suggestion and did: https://numpy.org...
by HermannSW
Sat May 30, 2020 8:27 pm
Forum: HATs and other add-ons
Topic: Mini loudspeaker for Pi
Replies: 2
Views: 174

Re: Mini loudspeaker for Pi

When not using the (4GB) Pi4B with DSViev logic analyzer https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=109137&p=1669139#p1667307 it is hanging at bookshelf. Because of the HDMI connectors the loudspeaker has no free choice for connecting to the 3.5mm headphone jack. But in this position so...
by HermannSW
Sat May 30, 2020 3:01 pm
Forum: Camera board
Topic: Discreet camera module for outdoor
Replies: 8
Views: 263

Re: Discreet camera module for outdoor

[*] Instead of rectangular PCB which protrudes from the behind of the camera, then only the tiny black camera component should be noticed. Zerocam . It uses the OmniVision OV5647 from the V1 camera so it is only 5MP. No IP rating so use it outdoors at your own risk. https://www.raspberrypi.org/foru...
by HermannSW
Sat May 30, 2020 10:36 am
Forum: General programming discussion
Topic: Pi4B GPU GFlops comparable to Intel i7 FPU?
Replies: 1
Views: 183

Pi4B GPU GFlops comparable to Intel i7 FPU?

Yesterday I stumbled over Idein's "py-videocore6" repo (Pi4B): https://github.com/Idein/py-videocore6 That references nineties' "py-videocore" repo for videocore4 of the other PIs. It shows 8 GFlops record for videocore4: https://github.com/nineties/py-videocore#records Idein reports from 24 GFlops ...
by HermannSW
Sat May 30, 2020 10:09 am
Forum: HATs and other add-ons
Topic: Mini loudspeaker for Pi
Replies: 2
Views: 174

Mini loudspeaker for Pi

End of year I started "aplay_ip_address on Raspberry Pi during boot" thread: https://www.raspberrypi.org/forums/viewtopic.php?f=36&t=259891 Later @hippy helped me to get espeak doing the same simpler by utilizing aplay as well: https://www.raspberrypi.org/forums/viewtopic.php?f=36&t=259891#p1583918 ...
by HermannSW
Fri May 29, 2020 10:14 pm
Forum: General discussion
Topic: Powering PCA9685 with Raspberry Pi
Replies: 13
Views: 431

Re: Powering PCA9685 with Raspberry Pi

My understanding is if each hardware device has its own power source, there won't be any issues with too little power. When using a lipo the C rating is important: https://oscarliang.com/lipo-battery-c-rating/ I used 3S 1000mAh 25C lipos a long time. You can draw 25A (1.0A*25C) of 11.1V (12.6V full...

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