About 30 years ago, a friend of mine set-up his camcorder and left it for a day to take a time-lapse of clouds from a window ledge in the office building where we worked in Glasgow (plenty of clouds here). That was the one day the window cleaners decided to come around, so his clouds time-lapse included several shots of leg silhouettes as the guys clambered around in front of the camera.
True cloud computing would include a burst in which a quantity of confidential personal information is randomly distributed to an unauthorised audience. Perhaps a flurry of bank statements? (It appears to be an inescapable feature of the original.)
This hearkens back to the nineties when I had an RCA editing VHS shoulder camera, which among its features was a variable time lapse selection, that I used on the Hibiscus, on several moonrises over a period starting from full to last quarter, and the sleeping snoring lump. Some people! Well worth the bucks, even better when I mated it to the Proscan editor which made nicely-nice between the two, each capable of controlling the other.
You spark the interest in people and show them how they can do things as well. You are a brilliant teacher. If only we could time lapse the life of a human, from birth to death and condense it into a short movie.
Checkout this video of a "Lotte" growing from zero to 20: th-cam.com/video/yfqpqiTMUEg/w-d-xo.html It is the best human aging time lapse I've come across.
@@ExplainingComputers Her parents must have the patience of a saint and the organisation of an army, to film her every so often edit it and make a film.. Did they film her in front of a white backdrop or was that photo shot? Some people are simply amazing.
Thank you, a very different look at 'cloud' computing, I could watch it all day! Thank you for your comprehensive video on time lapse photography and seeing your code now helps explain it a lot more.
Now, if we reverse the video we will get a very good explanation of how ice cubes naturally form is a glass of water. Excellent video and creates some interesting ideas for short videos. Thank you
Ever since that silent mini ITX pc, I've been looking out to build one. I've finally settled for a 300$ (217 GBP) build that'll have 512 (or so) GB SSD, a J4125 CPU and 8GB DDR4 ram! Thank you very much on that idea, It'll help me a lot when I just want to chill w/ videos, movies, or my huge music library
@Tano oh for sure! I plan to get a 60W one for that mini board. My main PC is just so noisy. My damn AKG K701 are open and I can just hear the machinery XD
Great illustration Chris. That's a fortune's worth of software, all for free, and the hardware cost isn't really bad at all. This also shows the power of what can be done with minimal programming. Thanks for another great video.
Love this video. Created a time laps of sunflowers growing for my 5 year old son and it blew his mind how much they move. Another video in raspberry pi os (bullseye) with camera adjustments for white balance etc would be amazing.
Bro everytime I watch any videos from you it gives me a feeling that your life stopped with you by 80's ,,, 😅😅😅😅😅😅 anyone else feels the same?? Thanks for the video! "Like"
I used a Pi 3 to capture a year-long time lapse of my front yard at one frame per-minute. Still rolling! :D Fun seeing the sun angles change over seasons.
I'm interested also in doing time lapse in that time scale as well. How did you do so? It's like to learn how to take a pic at 2 times per day and stitch it together over a year.
I did something similar a few years ago. Through an East facing bedroom window I pointed it towards where the sun would come up and set the timer to start just before dawn. Over a few weeks I got some very good video.
Once again, Dr. Barnatt, you have packed a huge amount, including ALL the necessary detail, of very useful, practical, clearly explained, RPi application development content into a single short video. I continued to be amazed and grateful for your work, skill, knowledge, ambition, and dedication! As a lazy person, I would appreciate a link to your Python source code, but I even understand the tough-love educational value of your decision to make me key it all in myself.
Thanks for this. I've put the code for the intial (ice melt) timelapse here: www.explainingcomputers.com/sample_code/Timelapse.py (link also now in video description).
@@ExplainingComputers Thank you, I'm very old already, so whatever fat-finger keyboard time you can save me to replicate your work should rightly accrue directly into your own personal lifetime longevity account. I truly hope it is so. But saying that, I admit I'm only cheating myself by not keying it in letter-by-letter myself, and thereby taking that opportunity to actually understand the functions and syntax of all that underlying-code. I always liked programming, but I hated the debugging, and that's what defeated me in the end. I always aspired to get it right in the first place, and never succeeded. It was SO humiliating!
A useful script. Thanks to Chris for sharing his research with us. I always prefer when someone with better skills than I has written and debugged something, rather than me fiddling for hours using my limited skill set, sometimes with zero results (but the experience gained). Even more frustrating when it's a task I'm sure others have succeeded at with ease. I've been looking for a DVR style program that runs on a Pi to grab video from a UVC capture card. Had no luck with any program recognizing the video stream and also having a programmable timer function, I had thought I might use an ffmpeg script with a cron job to implement it, but something similar to this script may work. Thanks again.
This is quite cool. You may also want to look at a GPS timeserver project with a Pi , there are other videos but the way you explain things is nice and simple. Accurate time can be very useful for many projects. Now i just need to work out the cheapest SBC with ethernet to do that project for my network :).
The ice time lapse was gorgeous with the glistening droplets. Looking forward to the cress time lapse too; I love watching the sprouts wave around (assuming to follow the sun?) As a possible follow up, could we see a video on a Raspberry Pi stop-motion system?
I wonder if the Pi camera could also be used as a Astronomy camera like the Skywatcher type of cameras. If it could, it may even help with meteor spotting on clear nights. But it would also require adapting to bright levels during the day and low levels of light at night. The Altair Astro brand uses CMOS chips so there could be a potential for this type of camera working over wifi to be used as a observing camera. So would this work and if it could be done?
I believe this can be done -- in the video where I first looked at the Pi HQ camera, several people noted in the comments that it can fairly easily be fitted to a telescope (the lens attachment is C-Mount), and reported great success taking astronomy images.
Absolutely great video! Man, if I had a Raspberry Pi when I was a kid, I'd would have been amazing. Too bad I can't get my nephews interested in any of this. Oh well, more fun for me. Thanks for posting these ideas!
Always fun to watch. The quality of your videos are amazing. Nice resolution. I was thinking about building a All sky camera (there is a Guit hub on that) so I can build one for my place for astronomy and watch for meteorite and fireball. Thanks again for the inspiration. 👍🏻✌🏻🇨🇦
For time lapse plant photography, would it be beneficial and more streamlined to have a plant in a black box with IR LED strips (the reels of the stuff) that switch off/switch over to white LEDs for the shots and then back again to the grow lamps/LEDs - rinse and repeat until finished. If I was going to do a plant time lapse project I'd be inclined to try it that way and possibly tape the IR LED strips above the plants and the white LED's in areas where it's needed for a well lit shot and have the SBC switch the lighting over in code.
your 750 frame example is fun because if you set the total time to one day, it would take 25 minutes to play one days worth of frames. as opposed to 25 minutes to capture what would take 30 seconds to play.
Nice! Don't forget: using a sleep function doesn't take into account any camera processing time, so you may experience drift - something that may be significant under certain circumstances.
My Pi weather station also takes this into account. It's still not accurately every second aligned to the clock. But I truncated the microseconds portion of the datetime value from the database, so it LOOKS like it was measured at that exact time, even though it's about 10-20 ms off. It doesn't matter much, but Python is extremely slow cause interpreted, and you will NEVER get it accurate, ever. There will always be a bit of a drift with Python.
For the crest project you can go on holiday next summer to the artic circle so it won't be dark for a few months. You can do time lapse on a phone now.
I have raspi taking photos for looong timelapse. it started about 3 years ago, takes one pic per minute. It takes about 300MB per camera per day. Currently 2 cameras taking pictures. Looks like i have to upgrade my NAS HDDs bigger very soon :D
Hi Chris thank you for another excellent & informative video, it shows how versatile the Raspberry Pi is. I use Kdenlive to put together slide shows in Linux Mint which turn out really well, the time lapse photography is even more impressive. Also it's good to see Mr Scissors in the spotlight.
There is another way to do this, more user-friendly for those that dont want to use the terminal or or write python code. there is a software that's ubuntu (and anothers flavors) has pre-installed called "cheese", it has an option to take bursts of photos and you can even set the time during each photo.
I enjoy your videos very much, i've learnt a lot and reinforced my love for computers with your videos. Regarding timelapses i've been experimenting with command "convert" on linux trying to automatically convert them to avi or gif. It works but so far the performance is very slow. thanks for your videos they are awesome.
I can't produce a sky time lapse video because in France the sky is allways blue... Nooooooooo... Thanks Christopher, I think I will use it for the fun, but not only. We are waiting for your next production impatiently. Best regards
Thanks for the video Chris, great content greatly explained as usual. I've been using a couple of Pi+cam (one is a 3B, the other is a ZeroW) for quite a while now to do full-day timelapses of the sky, so it's a topic that's sort of familiar and of great interest to me. As I was watching the cloud timelapse in the end I noticed that there's a red "circle" of discoloration in the center, that I clearly remembered was a problem when I got started with my timelapses. Turns out the solution is simple when using raspistill to do the captures, you just add the -st commandline parameter and through some sort of coding magic that I took from the raspistill docs and commented in my script as "passing stats for dynamic lens correction", the red circle dissapeared and the resulting image was really good. Since you're using python to do the captures,it'll probably be good to investigate if such a command/parameter/option exists, otherwise to do timelapses of content that could be color sensitive (such as grey/white clouds are), perhaps raspistill should still be used. In my project I take both an image of the East and West sides of the sky from a building, and also use a temperature/pressure sensor to log the data to have it visible along with the captures, in the future I'd like to add wind direction+speed and perhaps the amount on rainfall, but that requires a bit more time and probably more maintenance. This setup has been running for more than 2 years for the West camera and more than 1 year for the East camera + temperature + pressure, I don't share the URL because I don't want to spam, but I could post it if is of interest to someone since it's very related to the topic of the video. Thanks again for all the effort you put in your videos, the result is certainly great!
Another option instead of using a servo and physical shutter for the cress box, perhaps using an LCD shutter panel would work. I believe you can buy them from places like Adafruit/pimoroni etc.
When you realise that even for such a slow-moving subject as plants 15s is way too slow and exposure control is not trivial. A high-quality time lapse is still a very involved process.
Yes, that would be a very good idea. And ideally a "Take timelapse" button also, which when pressed would increment a variable to add to the file name to allow multiple time lapses to be taken.
Are PAL and NTSC frame rates that important these days? TV's all support 60Hz so from what I understand there's not really any importance any more, but I may be completely wrong.
I’ve done a similar but slightly more advanced thing where I imprint a UTC time stamp on each image and have them be captured with as accurate an interval as possible. I got some help writing a custom sleep function for extra accuracy. I now have it running and due to end on 2021-09-30 00:00:00 UTC.
To make it better, how can we get the used exposure time at the start and use it for all the frames? That would prevent the camera library possibly changing it every frame.
several years ago, 80-90s? a magazine article had a project using a cheap linear diode array from a flatbed document scanner. pointed it towards the moon, left it run for hours? as the earth rotated, got a low resolution image of the stars..:) it was interesting and something i should of setup for fun and learning...:/ now for your interesting hi-tec hobby video, thanks...😀
I think the solution to the cress growing problem is actually to grow it in a darkened room, lit only with artificial light. That way the quality of the light and exposure are constant and you wouldn't need the Pi to operate a shutter or control the lights. Just have enough to simulate daylight for 24 hours a day.
Yes, although my understanding is that the growlamp LEDs have to be turned down/off for a period of time to allow the growing plants to rest (as it is not natural for them to have sunlight 24/7).
In my experiments indoor growing (I've done several vegetables in hydroponic systems as a hobby), I think you should be OK with 24 hour light on leafy things and quick crop plants like micro-greens (cress is considered one). My experience is plants generally get more finicky about length of daylight as their behaviors become more complex (things like flowering and fruiting).
About 30 years ago, a friend of mine set-up his camcorder and left it for a day to take a time-lapse of clouds from a window ledge in the office building where we worked in Glasgow (plenty of clouds here). That was the one day the window cleaners decided to come around, so his clouds time-lapse included several shots of leg silhouettes as the guys clambered around in front of the camera.
😂😂😂
The origin of Mr. Scissors is revealed! He was born in Sainsbury's supermarket!
Yes, the resolution of the HQ cam has revealed his origins.
I wonder when Cousin Staple Remover will make an appearance...
Loving the "cloud computing" chapter xD
It was at that point that I lost it.
I hope that Christopher realises how we laud him.
True cloud computing would include a burst in which a quantity of confidential personal information is randomly distributed to an unauthorised audience. Perhaps a flurry of bank statements?
(It appears to be an inescapable feature of the original.)
:)
This hearkens back to the nineties when I had an RCA editing VHS shoulder camera, which among its features was a variable time lapse selection, that I used on the Hibiscus, on several moonrises over a period starting from full to last quarter, and the sleeping snoring lump. Some people! Well worth the bucks, even better when I mated it to the Proscan editor which made nicely-nice between the two, each capable of controlling the other.
I often wondered how time lapse was done with a pi. Now thanks to this episode all has been revealed. Excellent video, as always.
You spark the interest in people and show them how they can do things as well. You are a brilliant teacher. If only we could time lapse the life of a human, from birth to death and condense it into a short movie.
Checkout this video of a "Lotte" growing from zero to 20: th-cam.com/video/yfqpqiTMUEg/w-d-xo.html It is the best human aging time lapse I've come across.
@@ExplainingComputers Her parents must have the patience of a saint and the organisation of an army, to film her every so often edit it and make a film.. Did they film her in front of a white backdrop or was that photo shot? Some people are simply amazing.
@@tonysheerness2427 Yes, agreed -- amazing organization. I believe it was the same background.
The black dots flickering in your clouds time-lapse video reminds me of the black dots flickering in old movie footage.
Raspberry Pi has opened up the doors of photography on a budget. Thanks Chris!
Isnt a raspberry pi 4 about $100?
Thank you, a very different look at 'cloud' computing, I could watch it all day! Thank you for your comprehensive video on time lapse photography and seeing your code now helps explain it a lot more.
Excellent timing for this Chris - my new HQ camera should arrive in the next few days! This is most definitely one of the things I want to use it for.
His projects are just getting cooler and cooler!
ICY!
Absolutely Fabulous episode. Exactly what I was looking for, you’ve given me a lot of ideas. Thanks from overly sunny Orlando.
Thanks for this. If I've given you ideas, then my work is done! :)
Send some sun sitting on the beach getting sprinkled on in NJ.
Now, if we reverse the video we will get a very good explanation of how ice cubes naturally form is a glass of water.
Excellent video and creates some interesting ideas for short videos.
Thank you
Yes, I should have run it backwards!
Ever since that silent mini ITX pc, I've been looking out to build one.
I've finally settled for a 300$ (217 GBP) build that'll have 512 (or so) GB SSD, a J4125 CPU and 8GB DDR4 ram!
Thank you very much on that idea, It'll help me a lot when I just want to chill w/ videos, movies, or my huge music library
Enjoy your new PC. I use mine every day to watch online content on my TV. :)
@Tano oh for sure! I plan to get a 60W one for that mini board. My main PC is just so noisy. My damn AKG K701 are open and I can just hear the machinery XD
Great illustration Chris. That's a fortune's worth of software, all for free, and the hardware cost isn't really bad at all. This also shows the power of what can be done with minimal programming. Thanks for another great video.
Love this video. Created a time laps of sunflowers growing for my 5 year old son and it blew his mind how much they move. Another video in raspberry pi os (bullseye) with camera adjustments for white balance etc would be amazing.
Thanks for this. Your sunflower video sounds cool.
Bro everytime I watch any videos from you it gives me a feeling that your life stopped with you by 80's ,,, 😅😅😅😅😅😅 anyone else feels the same??
Thanks for the video! "Like"
Mr SCissors ✂️ is the star 🌟 of the show!
Always.
A bit of RGB lighting under the glass and ice would look nice, consider me inspired Chris!
Ah, yes . . . indeed!
I used a Pi 3 to capture a year-long time lapse of my front yard at one frame per-minute. Still rolling! :D Fun seeing the sun angles change over seasons.
I'm interested also in doing time lapse in that time scale as well. How did you do so? It's like to learn how to take a pic at 2 times per day and stitch it together over a year.
A cloudy sky in England - colour me surprised! Excellent video, I've been meaning to test out my camera, this has served as a good prompt.
Christopher Barnatt: the synthesis between art and science!
Another lovely video! I love it when the glass is half full. Thanks you Chris!
:)
I did something similar a few years ago. Through an East facing bedroom window I pointed it towards where the sun would come up and set the timer to start just before dawn. Over a few weeks I got some very good video.
Sounds very cool.
Always a pleasure to watch another video on this channel.
:)
Once again, Dr. Barnatt, you have packed a huge amount, including ALL the necessary detail, of very useful, practical, clearly explained, RPi application development content into a single short video. I continued to be amazed and grateful for your work, skill, knowledge, ambition, and dedication! As a lazy person, I would appreciate a link to your Python source code, but I even understand the tough-love educational value of your decision to make me key it all in myself.
Thanks for this. I've put the code for the intial (ice melt) timelapse here: www.explainingcomputers.com/sample_code/Timelapse.py (link also now in video description).
@@ExplainingComputers Thank you, I'm very old already, so whatever fat-finger keyboard time you can save me to replicate your work should rightly accrue directly into your own personal lifetime longevity account. I truly hope it is so. But saying that, I admit I'm only cheating myself by not keying it in letter-by-letter myself, and thereby taking that opportunity to actually understand the functions and syntax of all that underlying-code. I always liked programming, but I hated the debugging, and that's what defeated me in the end. I always aspired to get it right in the first place, and never succeeded. It was SO humiliating!
A useful script. Thanks to Chris for sharing his research with us. I always prefer when someone with better skills than I has written and debugged something, rather than me fiddling for hours using my limited skill set, sometimes with zero results (but the experience gained). Even more frustrating when it's a task I'm sure others have succeeded at with ease. I've been looking for a DVR style program that runs on a Pi to grab video from a UVC capture card. Had no luck with any program recognizing the video stream and also having a programmable timer function, I had thought I might use an ffmpeg script with a cron job to implement it, but something similar to this script may work. Thanks again.
I'd like to see the pi zero time-lapse experiment have motion sensing added, and then installed into an acrylic porch light globe.
The birds make the clouds video look like it's having old timey film blotches
Great video! Looking forward to the time lapse plants!
Thanks so much Chris, I am a keen photographer and really enjoyed this episode. 👍
I'm putting to action my plans to make a Raspberry Pi astro cam, getting the feeling I need to learn a bit of Python!
This is one of my favorites videos!. Thanks Chistopher.
Thanks!
This is great, now I can see how the dead rat in the attic decomposes and gives off awful smell.
How do you record a timelapse of the smell?
This is quite cool. You may also want to look at a GPS timeserver project with a Pi , there are other videos but the way you explain things is nice and simple. Accurate time can be very useful for many projects.
Now i just need to work out the cheapest SBC with ethernet to do that project for my network :).
The ice time lapse was gorgeous with the glistening droplets. Looking forward to the cress time lapse too; I love watching the sprouts wave around (assuming to follow the sun?)
As a possible follow up, could we see a video on a Raspberry Pi stop-motion system?
I wonder if the Pi camera could also be used as a Astronomy camera like the Skywatcher type of cameras. If it could, it may even help with meteor spotting on clear nights. But it would also require adapting to bright levels during the day and low levels of light at night. The Altair Astro brand uses CMOS chips so there could be a potential for this type of camera working over wifi to be used as a observing camera. So would this work and if it could be done?
I believe this can be done -- in the video where I first looked at the Pi HQ camera, several people noted in the comments that it can fairly easily be fitted to a telescope (the lens attachment is C-Mount), and reported great success taking astronomy images.
Absolutely great video! Man, if I had a Raspberry Pi when I was a kid, I'd would have been amazing. Too bad I can't get my nephews interested in any of this. Oh well, more fun for me. Thanks for posting these ideas!
Nice a new video ! As always I'm here I'm pretty sure it's really interesting as ever. Have a nice week Christopher
Thanks, you too!
Always fun to watch. The quality of your videos are amazing. Nice resolution. I was thinking about building a All sky camera (there is a Guit hub on that) so I can build one for my place for astronomy and watch for meteorite and fireball. Thanks again for the inspiration. 👍🏻✌🏻🇨🇦
Once again you provide such pleasant schooling, Cristopher. You do such great work.
For time lapse plant photography, would it be beneficial and more streamlined to have a plant in a black box with IR LED strips (the reels of the stuff) that switch off/switch over to white LEDs for the shots and then back again to the grow lamps/LEDs - rinse and repeat until finished. If I was going to do a plant time lapse project I'd be inclined to try it that way and possibly tape the IR LED strips above the plants and the white LED's in areas where it's needed for a well lit shot and have the SBC switch the lighting over in code.
Time lapse video is interesting. Quality is good too. PI is great for lots of things.
Another project I’ll have to try myself. Looking forward to your next video!
Thanks and greetings Perry!
Super and no knotted twine to steady the camera!
:)
He is making difficult work look so easy that now I am thinking about start learning coding and do same projects like this.
It's not work if you're having fun!
@@fahadus well it depends on motivation and interest, Nothing is impossible.
Really interesting episode....it's amazing me what these SBC can do
Excellent, as always. But it's missing some whiskey un the glass...
I was just about to say the same thing!
@AstroCat I'm French, and here, it is "Pastaga"
your 750 frame example is fun because if you set the total time to one day, it would take 25 minutes to play one days worth of frames. as opposed to 25 minutes to capture what would take 30 seconds to play.
Maybe one could make a whole stop motion animation with this setup?
Also, a new test video featuring home-made timelapse stuff?
@Tano For me that would be a good thing, force me to work quicker :)
That camera doesn't come with an autofocus lens, does it? Great time-lapse study project.
Lots of great information there Chris, well done and thank you.
Nice!
Don't forget: using a sleep function doesn't take into account any camera processing time, so you may experience drift - something that may be significant under certain circumstances.
My Pi weather station also takes this into account. It's still not accurately every second aligned to the clock. But I truncated the microseconds portion of the datetime value from the database, so it LOOKS like it was measured at that exact time, even though it's about 10-20 ms off. It doesn't matter much, but Python is extremely slow cause interpreted, and you will NEVER get it accurate, ever. There will always be a bit of a drift with Python.
For the crest project you can go on holiday next summer to the artic circle so it won't be dark for a few months.
You can do time lapse on a phone now.
Python makes a versatile little Raspberry Pi camera!
I have raspi taking photos for looong timelapse. it started about 3 years ago, takes one pic per minute. It takes about 300MB per camera per day. Currently 2 cameras taking pictures. Looks like i have to upgrade my NAS HDDs bigger very soon :D
Hi Chris thank you for another excellent & informative video, it shows how versatile the Raspberry Pi is. I use Kdenlive to put together slide shows in Linux Mint which turn out really well, the time lapse photography is even more impressive. Also it's good to see Mr Scissors in the spotlight.
There is another way to do this, more user-friendly for those that dont want to use the terminal or or write python code. there is a software that's ubuntu (and anothers flavors) has pre-installed called "cheese", it has an option to take bursts of photos and you can even set the time during each photo.
Another excellent video. Lots of ideas for things to do in lockdown Melbourne Australia.
I enjoy your videos very much, i've learnt a lot and reinforced my love for computers with your videos. Regarding timelapses i've been experimenting with command "convert" on linux trying to automatically convert them to avi or gif. It works but so far the performance is very slow. thanks for your videos they are awesome.
It’s a pilapse!
Oh I wish I had thought of that!
I can't produce a sky time lapse video because in France the sky is allways blue...
Nooooooooo... Thanks Christopher, I think I will use it for the fun, but not only.
We are waiting for your next production impatiently.
Best regards
Great video, always look forward to a sunday and your videos
Now we need a video for astrophotography, and long exposure shots.
Yeah. I'm sure that will take some more advanced setup, and I'd like to see how it's accomplished!
At least cover image stacking!
Great video, great fun! Now you might consider doing one of time lapse of the 3D printer!
Oooh. Now that would be fun.
Thank you. Well presented. Looks like anyone could do it. Like in 'personal computing', or maybe Byte magazine.
..and my brain is playing that classic Queen/Bowie piece, "Under Pressure" as I watch this. I blame Vanilla Ice, ice, baby... I will not apologize.
:)
Wow! Class A video, there. Very instructive, and fascinating, too. Thanks, Chris!
Thanks! :)
Good one Christopher.
You never disappoint! Big like.
Big thanks!
Wow, I might actually be able to do that! Carefully done👌
Thanks for the video Chris, great content greatly explained as usual. I've been using a couple of Pi+cam (one is a 3B, the other is a ZeroW) for quite a while now to do full-day timelapses of the sky, so it's a topic that's sort of familiar and of great interest to me. As I was watching the cloud timelapse in the end I noticed that there's a red "circle" of discoloration in the center, that I clearly remembered was a problem when I got started with my timelapses. Turns out the solution is simple when using raspistill to do the captures, you just add the -st commandline parameter and through some sort of coding magic that I took from the raspistill docs and commented in my script as "passing stats for dynamic lens correction", the red circle dissapeared and the resulting image was really good. Since you're using python to do the captures,it'll probably be good to investigate if such a command/parameter/option exists, otherwise to do timelapses of content that could be color sensitive (such as grey/white clouds are), perhaps raspistill should still be used. In my project I take both an image of the East and West sides of the sky from a building, and also use a temperature/pressure sensor to log the data to have it visible along with the captures, in the future I'd like to add wind direction+speed and perhaps the amount on rainfall, but that requires a bit more time and probably more maintenance. This setup has been running for more than 2 years for the West camera and more than 1 year for the East camera + temperature + pressure, I don't share the URL because I don't want to spam, but I could post it if is of interest to someone since it's very related to the topic of the video. Thanks again for all the effort you put in your videos, the result is certainly great!
Very interesting -- I will try the lens correction thing. Thanks! :)
Another option instead of using a servo and physical shutter for the cress box, perhaps using an LCD shutter panel would work. I believe you can buy them from places like Adafruit/pimoroni etc.
Uhm, a very interesting idea!
Excellent video, as always.
That was a lot of fun, and the results were great! Thanks Chris.
When you realise that even for such a slow-moving subject as plants 15s is way too slow and exposure control is not trivial. A high-quality time lapse is still a very involved process.
Fantastic explaination!
Great video. Mushrooms. They grow in the dark and have the Pi switch lamps on and off for the time lapse pictures.
Greetings
Thanks for making Sunday great !
:)
Nice video. Thank you.
You could also add a button via GPIO to shutdown pi if you are done with timelapse earlier.
Yes, that would be a very good idea. And ideally a "Take timelapse" button also, which when pressed would increment a variable to add to the file name to allow multiple time lapses to be taken.
Hello sir...Bit late in the class... here is my attendance...now watching..
And as expected less views.....
Great video!!!! I think I might take a shot at this. :)
Thank you!
Hi Cris, will you do a video about optical fibers (standars, connectors, etc)? Thanks!
Ice globules. I love that word but not often get the chance you use it so,
globules, globules, globules, globules, globules.
Brilliant! Thanks for this, you've inspired me to give it a go!!
Excellent as always, but how did you get it to sudo shutdown now without asking for a password?
Sir Sainsbury's Scissors! ✂️
Yes, you know his origins now.
Good morning from Brazil!
Greetings from the UK!
Wow , Great video, really well done and explained….. as always, thankyou
Great video. I wonder how difficoult it ,ight be to run a timelapse on a Pico.
Awesome video…been waiting for this one…more great time lapse ideas…thanks for taking the time to make great content!
Are PAL and NTSC frame rates that important these days? TV's all support 60Hz so from what I understand there's not really any importance any more, but I may be completely wrong.
It's not only PAL/NTSC frame rate, it's also a mains voltage frequency (50/60 Hz)
@Tano You think only about watching a video, but forgot about recording - try 60FPS with 50Hz flickering (not so old) LED lamp
Very nice, Chris. Thank you!
Like always awesome video
I’ve done a similar but slightly more advanced thing where I imprint a UTC time stamp on each image and have them be captured with as accurate an interval as possible. I got some help writing a custom sleep function for extra accuracy. I now have it running and due to end on 2021-09-30 00:00:00 UTC.
To make it better, how can we get the used exposure time at the start and use it for all the frames? That would prevent the camera library possibly changing it every frame.
Or maybe we can just manually set the exposure at the start via the command line?
several years ago, 80-90s? a magazine article had a project using a cheap linear diode array from a flatbed document scanner. pointed it towards the moon, left it run for hours? as the earth rotated, got a low resolution image of the stars..:) it was interesting and something i should of setup for fun and learning...:/ now for your interesting hi-tec hobby video, thanks...😀
I think the solution to the cress growing problem is actually to grow it in a darkened room, lit only with artificial light. That way the quality of the light and exposure are constant and you wouldn't need the Pi to operate a shutter or control the lights. Just have enough to simulate daylight for 24 hours a day.
Yes, although my understanding is that the growlamp LEDs have to be turned down/off for a period of time to allow the growing plants to rest (as it is not natural for them to have sunlight 24/7).
@@ExplainingComputers Perhaps you could alternate the grow lamps with something less intense but still bright enough to give a useable image?
@@donaloflynn Yes, indeed. Or if the Pi controlled the grow lamps it could turn them off, and turn on other lighting, to take each frame.
In my experiments indoor growing (I've done several vegetables in hydroponic systems as a hobby), I think you should be OK with 24 hour light on leafy things and quick crop plants like micro-greens (cress is considered one). My experience is plants generally get more finicky about length of daylight as their behaviors become more complex (things like flowering and fruiting).
@@skoolspirit1476 Very useful feedback -- thanks greatly.
Great video! I am hoping you can do a tutorial on the raspberry pi pico, collecting data with ADC and transmitting that data to another computer.
Nice easy video. Thank you for sharing!
Excellent. Thanks so much. V interesting.