ESP32 Composite Video
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- Опубликовано: 13 сен 2024
- This video shows how to generate a composite video signal using the ESP32 microcontroller.
The parts, code, converters, and more details can be found on the project page: bitluni.net/esp...
plz share :-)
Details on video standards:
www.radios-tv....
Charles Lohr's video on esp8266 video signals: • Broadcasting COLOR Ch...
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![ESP32 VGA [Arduino, 3D]](http://i.ytimg.com/vi/G70CZLPjsXU/mqdefault.jpg)
Mind blown. Have spent the entire last week trying to do this with ICs, analog circuits, ancient texts... and here it is, on my favorite µC
Excellent job! The animated explanation of the tv lines and timing are the best i have ever seen. Keep doing!
Facts.
I can't up click more than once. But I could not agree more.
OMG that is just sooooo cooool (and your explanation graphics are superb)
With every upload... It's like you know the project I'm working on! Don't stop these quality vids on microprocessed video!!! Please! I love each one so so so much man! 🙏
Meanwhile some programmers require Core i9 to flash a single LED.
i'm one of them!
The Windows 10 Task Manager takes an entire second to open on an i7 with 4 logical cores running at 3.45 GHz. I don't even know how they managed to achieve that.
@@ThePC007 because the speed of an application's launch depends on your HDD/SSD and RAM, not your CPU
@@moth.monster It takes much longer when I underclock my CPU, so that seems to be the bottleneck here. it also opens a little faster on my father's PC which sports a faster CPU, so there's that. Either way, I've seen an old Fujitsu PC with terrible specs at my university open the Win7 task manager almost instantly, while on Win10, even on top notch hardware, I have to wait for it to open. MS is really dropping the ball lately. Even more so than they normally do.
@@ThePC007 C# ?
Explanation and visualization are simply superb, can imagine how much hardwork has gone into making this.
Wow... just wow!!! 😍
szabonandi said :- "Excellent job! The animated explanation of the tv lines and timing are the best i have ever seen. Keep doing!" I cant say it any better.
markpitts5194 said:- "szabonandi said :- "Excellent job! The animated explanation of the tv lines and timing are the best i have ever seen. Keep doing!" I cant say it any better." I cant say it any better either.
Very nice work!! You could probably use an op-amp to scale down the DAC output voltage so you can use more than 77 shades.
Yes... I also mentioned a voltage divider but I also think that an op-amp is a good choice to get a cleaner signal. The built in buffer of the DAC isn't that strong. I need to test this as soon I get an opamp that's able to follow at 13MSa
checked for fast opamps.. they cost as much as the esp32 🙈. does anybody know a good one?
@@bitluni for a voltage follower, just use a BJT or FET as an emitter follower (or source follower) 👍
This is so clever, I really love what all of you do with these wonderful and cheap kits.
Man, you must be having the most fulfilling that one can dream of. You are my inspiration for such electronics.
Clever! Thank you for spoiling our minds and providing chewed information.
Now that is impressive! 2 wire display! awesome. (PS for those of you that only have component video, you can you the green grey scale channel)
Thank you for all the in depth explanation. Really interesting and really impressive
This is some really nice work!
I love that you work in different environments, like the converter webpage.
That's exactly what I was looking for after your last video. Thanks.
I'm impressed! Luckily I have one ESP32 module (specifically the one that comes with built-in OLED + LoRa module) so I'm definitely going to try this out!
I have been waiting for this video, I did not think you would get such great results. Well done!
I'm impressed !
Getting a lot of my favorite 3D prints spinning on my TV :)
This is all very cool, its going to be the start of many fun things I think.
You the man!
Man you are amazing and a big inspiration to me. Really appreciate this videos.
This is certainly one of the coolest videos I've ever seen on youtube. Really didactic, and really cool!
Obviously your definition of "quite simple" is different from mine. That's some amazing work!
The last time I did bit-banging video, I just about got a PIC micro to display two grayscale bars (and that took a week's worth of evenings to get all the sync pulses sorted out, after which I swore never to try it again)
I remember watching this video and trying it out while literally not knowing anything. Now I kinda know a little about the esp and arduino and i actually understand how the code works (at least the simple parts)
Very well animated. Thanks for linking sources. A+ video!
Amazing, now I can display data from my home automation on my TV. Thank you!
I think classic consoles use a MUCH simpler sync pattern and don't use half line shifting, this way they achieve half-resolution non-interlaced display. And hey it works.
This will help me with my crtelecaster project, thanks alot!
Typo on first link, should be "composite" vs "compositve".
Anyway, very nice job on the video, and the animations were totally worth it. Awesome Stuff!
thanks!
Wow that's amazing. Thank for doing all this work - it's amazing to see what is possible! Again WOW!!!!
Hello sir, I want to read a analog (NTSC/PAL) signal from a analog camera, then edit it in esp 32 and send it back. Can you help me in this project?
Nice explanation, and editing...
Awesome work man 😁
Well done 👍
Great video, and to top it all nice documentation! Bitluni, I was wondering: The ESP32 CAM, would it somehow be possible to capture the video in from the ESP32 camera, digitize it and output it using your method to some old TV/LCD-screen in BW or gray scale? Have you seen any such examples?
It is a good time to be alive ;) Great video. Thanks.
Just perfect. Thanks for this great presentation!
Parking monitor LCD are sold for less than €20, they are LCD with composite input.
Light, low power (can be powered with 5-7V), inexpensive.
Perfect as small monitor for DIY projects.
Hi Bitluni! Excellent job, continue that videos!!!! One question, can to use composite video to s-video cable beacuse I have that, or is need just composite video to composite video cable. Thanks advance!
Wow! This is a very impressive application!
This is so forward to my knowledge... but sure awesome stuff you're doing! :) Keep up the good work!
Brilliant !!! I subscribed and liked . Thank you very much for such explanation and your time !!!!
Simply amazing, dude!!!
Kudos
Simply awesome! a great great great explanation of the CRT display science.
Ha! Got this working on my ESP32, can't believe you can do this. I'd like to generate a teletext signal, there's a project for the raspberry pi that does it, but not seen anyone who's done it for the ESP32. It must be possible, very similar to generating composite video I guess? 4 to 6 lines instead of 625.
Two useful projects would be using it to convert ip camera, and also for wled, display what's going on with all the lights layed out and other stats
Hi sir, its a nice video. I appreciate,
Can you make a project about making a digital oscilloscope using ESP 32? Since it has faster ADCs and more than one ADC s can be used for interleaved sampling to increase the effective bandwidth. Please think about this idea. It may be very useful for beginners because proper oscilloscopes are quite costly.
Oh god, this is by far the most coolest microcontroller ideas I have ever seen. Doing this with a simple ESP32 micro is a jaw dropper... can you do the same with an AVR chip or ARM chip which has I2C? Is it possible you can do this using UART or SPI or Bit Banging? Matter of fact, you can convert the analog signal to HDMI signal using low cost common video IC chips. Either way this composite video signal from a simple microcontroller gives more control and design ideas for adding LCD to an ESP32 project.
You are insane :) Awesome explanation - thanks a lot! The hardest part is to find a monitor with composite oder scart these days :D
here you can find an abandoned one each street corner 🙈
Many car DVD-players have composite video in.
Great stuff.
Getting the video timings right for interlaced isn't easy.
The fact that you are rendering 3D meshes on the second core is so cool as well. ;)
Something I've wanted to do for many years is to write a 3D graphics core on FPGA.
I will definitely give your code a try with the ESP32 first. It's super handy for getting a display output easily.
I remember seeing Charles' NTSC ESP vid for the first time. It was also very impressive.
I'm wondering if a "sample and hold" circuit could be used for RGB from the single DAC output?
You could have a counter that resets during Hblank, then just cycle through Red, Green, Blue on each pixel, while also outputting the lower two bits of the counter into a mux chip.
Or, just use an external counter that is clocked by I2S BCLK?
Sure the colour "resolution" will only be around 1/3 of the 640 pixels per line, but it could work.
Or, use the second DAC channel for Red and Blue, while the first DAC is used for Green.
Color on composite doesn't work that way unfortunately.
Yes, hence "RGB". :p
I know Composite requires a stable colour burst signal, and that has to be running continously in the background.
The colour burst is then gated on for say ten cycles, during the horizontal back porch.
It can be done on the ESP of course, as demonstrated by Mr Charles Lohr (and by other people, on many other MCUs), but it would be nice to see if the ESP32 can handle even higher quality RGB output with only a few external components.
Very nice piece of enginering, good work!
Very very good content! I'm really amazed. Please keep up the good work. Cheers
0:33 I have got completely the same model of Sony Trinitron (also 14 inch), which was used in the late 1990s and the early 2000s by my older sister (I am 25 and she is 41 now), but after the analogue television switch-off it remains almost unused.
Our unit is stored in our garage, but unfortunately, it is actually much dirtier than that on the photo and needs thorough clenaning!
Very impressive man! Keep the videos coming
You're a wizard, Harry!
Great video, nice signal animations
Bitluni, amazing work!!!!
Can I please ask your opinion of how to extend this project?
I want to be able to synchronize this to an external video signal so I can generate an OSD overlay on a composite video signal.
But the synchronization part is seemingly impossible!
I'm made a test circuit with an LM1881 sync separator and I have modified the composite output library so that the clock source for the I2S DMA is set to the APLL. I can then modify the APLL registers with rtc_clk_apll_enable() and have very fine frequency control over the I2S DMA output.
I then wrote a Phase Frequency Detector type PLL 'loop' in order to lock onto the external VSYNC signal. It compares the VSYNC pulse to when data is written I2S DMA and tries to get them into sync by adjusting the the APLL regs and hence the frequency that the data is pushed out.
I can get reasonably close to a 'lock' but no matter what I do there is always about 1 line of jitter which is not acceptable for drawing an OSD.
I also tried a 'dumb' solution where the external VSCYN simply triggers the function to write to the I2S buffer but this still jitters badly....
Any ideas?, please help, I am stuck :(
A video overlay would be great to have in a library.
You may not be able to do composite (color), but with three parallel outputs you should be able to do component video in full color and then if you want composite from that use an external modulator circuit
I have to admit, I'm more impressed by the animations you show than by the fact you generated a FBAS/CVBS signal ;) I also like using low level hardware stuff of the ESPs to generate signals. Did that on my own to control a large LED matrix that has no own controller and needs multiplexing. Works fine, however, I only show boring text on it because I'm really bad at doing animation / graphics :/
So, really nice job!
Btw. You know, you have to go wireless and color, right? CNLohr did that too :)
thanks. I'll try color. btw. charles was only able to do just black&white and some color because he was using just i2s on a digital pin.
Ok that all went right over my head but hey I used to play PS2 with those composite lines
as always amazing cool videos composite video with esp32😊
I really enjoy your channel.
Great video, thanks so much for the explanation!
Thank you. Nice work
Amazing, thank you!
Might be interesting to tweak the code to output line 21 closed caption signals.
Awesomeeeeeeeee !!! so enlightening ...thanks for sharing the knowledge
I want same but with Esp 32 cam web based system using one of its gpio to also genral video signal in composite formet so we can also transmit it using rf diy transmitter and amp to analogue crt tv .
interesting, have you tried to reverse the process, to create something like a vhs capture card?
Loved it! I enjoy your English accent... It's strong, but you're very easy to understand. There was one word that threw me though... Sounded like you said predeceased.. Was it "preceded"?
One of the coolest esp32 projects ever! 👏 if u used the version with 4MB of external ram could you do higher resolutions?
Good thinking.. I already have such a module here. However, the speed of the external ram is limited. I thing there will be much optimization to utilize the cache the most. It's definitively fast enough for the transformed vertices/normals and audio. It's probably not fast enough to transfer the whole frames. There still might be a solution
This is impressive. Great work
Ah...the ESP32 one of my favorites❤
Bravo, very cool! Thank you for posting
You could recreate a ZX Spectrum with this or something similar, that would make a great learning tool for children. I loved the fact of th ZX that you get a blank slate kind of machine which leaves so much space for your own imagination. Could you make it with micropython for example and a way to store programs?
Do you think it would be possible to have a composite INPUT on the ESP32, which displays to an TFT? That would be a fun little monitor! I think it should be fast enough, but I don't know enough about composite video to try it out.
Interested in this as well!!
Code doesn't work. Error: "I2S_CLKM_CONF_REG' was not declared in this scope" what am I missing?
How about a challenge to make a component video capture?
AV to ESP32 Stream
I was thinking doing the same but you need first revers the process using ADS (at high frequency first ) to trigger timer that store analog read of the signal , second process this signal to the PC via USB or WiFi , last if you didn't done the encoding process on the ESP32 you need to create programm the transfer composite single to real images .
Kick ass work!!
I did monochrome video on an STM32F446 last week and ended up using the SPI port for monochrome video as the DAC onboard the STM32 could not deliver more than 2MHz B/W. What DAC did you use? Did you get PAL colour working?? Thats impressive, especially bothering to do interlaced PAL with a proper Vsync.
Edit - Ah I see (I watched this a 2nd time) your uP has a fast internal DAC - a better choice of part than my STM32 and you did not manage PAL colour. Not surprised really.
Did you consider just not bothering with interlacing as it makes everything a whole lot easier?
Really great work!
Excellent work sir. Subscribed.
It is working flawlessly. Thanks Bitluni. Now, I'm trying to transmit at a tuned frequency in PAL without the composite output. Do you think it would be a complicated step? I'm still struggling to understand the code globality. Thanks.
I just tested CompositeVideoSimple and CompositeVideo on HUZZAH32 and they work! A1 and A0 both work as composite video out. Both PAL and NTSC seems to work equally well on my 5" video monitor. Maybe you could print temperature and Hall-sensor.
The visualizations in this are fantaaaaaaaaaaastic, what'd you use to make them? I'd really like to step up my teaching game with stuff like that.
One word: Awesome!!!
Unbelievable!
Great job!
wow! mind -> blown!
Could we also use the DAC to digitalize an analog PAL or NTSC Signal and display it on say a webpage?
we need an ADC (ananlog to digital converter) for that, but the intranal ones of the ESP32 are way too slow since they need to compare the value in several steps. I would suggest to use a cheap grabber for that and stream the content using sonme kind of software... (obs studio, if that works... I never tried creat i live stream page yet)
Yes, that's what I was thinking! That way I could make my own IP camera. What about using an external ADC?
Brilliant. I have no need to do this but it was interesting.
Brilliant. Made my head explode.
Hi. Your program dont work at display with this formats videos: AHD, CVBS and IPS. How to make work in this display without external converter?
Finally got some free time, and I finally found you. Seems like time to lose some free time
Great video again!
Hey @bitluni! Amazing projects, and thanks for sharing knowledge with us! About one year ago I had the chance to get 7 small black&white CRT intercoms systems, wondering if i can build a 2x2 CRT matrix! now, after some time, I wanted to begin, and found your CRT projects, amazing! I'd really appreciate if you have some advices about how to do it :) I'm thinking about using both DACs on the ESP32 and "multiplex the signal splits" on the monitors, do you think it's going to work? also... I think I need to split each line based on the horizontal amount of monitors (2) and stretch every part in order to fill the monitor line, then going to the next monitor... I 'm wondering if I have to draw the whole screen before going to the next one of i have to draw the lines sequentially on all monitors... also, the manual indicates that the monitor gets a CCIR input signal, do you have any suggestion about how to output that signal? Thank you, and again thank you for sharing your experiments!
**BOOOOOOM** (mind blown)
What tools did you use to make the animation starting at 1:59? It was so well explained. Thank you very much.
Astounding.
Dear Luni,
I doubt you will read this.
How did you make the font? I would like to make the text larger for use on my 4" CRT.
The file font6x8.h holds the font. It's not too hard to figure it out, each value is the grey level. The second character, for example, is:
0, 0, 255, 0, 0, 0,
0, 0, 255, 0, 0, 0,
0, 0, 255, 0, 0, 0,
0, 0, 255, 0, 0, 0,
0, 0, 0, 0, 0, 0,
0, 0, 255, 0, 0, 0,
0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0,
This is an exclamation point.
With some code changes you could double it to a 12 x 16 font that would not require an extra font-file, but the characters would be a bit chunky.
It should be easy to take some publicly available font files and create an include from them.
@@mattreed59 thanks a lot!
Great explanations :)
But what are the 2 resistor values for the voltage divider ?
Amazing video! Do you think this can be used into a more modern display (vga/dvi)?
You blew my mind again 😐