ESP32 Composite Video
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- เผยแพร่เมื่อ 27 ส.ค. 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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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
genlock? ;)
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.
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! 🙏
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.
OMG that is just sooooo cooool (and your explanation graphics are superb)
Explanation and visualization are simply superb, can imagine how much hardwork has gone into making this.
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.
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# ?
Wow... just wow!!! 😍
This is so clever, I really love what all of you do with these wonderful and cheap kits.
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)
Clever! Thank you for spoiling our minds and providing chewed information.
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) 👍
That's exactly what I was looking for after your last video. Thanks.
This is some really nice work!
I love that you work in different environments, like the converter webpage.
Thank you for all the in depth explanation. Really interesting and really impressive
I have been waiting for this video, I did not think you would get such great results. Well done!
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!
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!
It is a good time to be alive ;) Great video. Thanks.
Very well animated. Thanks for linking sources. A+ video!
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'm impressed !
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)
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.
Man you are amazing and a big inspiration to me. Really appreciate this videos.
Amazing, now I can display data from my home automation on my TV. Thank you!
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!!!!
You're a wizard, Harry!
Just perfect. Thanks for this great presentation!
Wow! This is a very impressive application!
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.
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 impressive man! Keep the videos coming
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
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.
Great video, nice signal animations
Very nice piece of enginering, good work!
Simply awesome! a great great great explanation of the CRT display science.
This is so forward to my knowledge... but sure awesome stuff you're doing! :) Keep up the good work!
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?
as always amazing cool videos composite video with esp32😊
I really enjoy your channel.
Code doesn't work. Error: "I2S_CLKM_CONF_REG' was not declared in this scope" what am I missing?
great topic, great series. thank you.
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!
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?
Very very good content! I'm really amazed. Please keep up the good work. Cheers
Might be interesting to tweak the code to output line 21 closed caption signals.
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!
This is impressive. Great work
Thank you. Nice work
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.
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?
Amazing, thank you!
Great video, thanks so much for the explanation!
Awesomeeeeeeeee !!! so enlightening ...thanks for sharing the knowledge
Brilliant. Made my head explode.
interesting, have you tried to reverse the process, to create something like a vhs capture card?
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.
Really great work!
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 .
isn't composite video loaded down with a 75ohm terminator on the receiver side by spec? if so, how is the esp able to drive the output (assuming the TV follows the spec, and the esp32 has a >10k output impedance)
Kick ass work!!
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
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?
Unbelievable!
Great job!
Excellent work sir. Subscribed.
One word: Awesome!!!
This is so cool! Thank you!
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!!
hey @bitluni
i tried this out on my esp32-wroom-32u board which should be enough for the froject but im not getting a signal help
Can you output a ESP32 Cam to a HDMI monitor as well. 6" in monitor?
I think tihs is no longer working, I try with the ESP32 core version 4.0.0 and it doesnt output any signal, doesn anyone know what is the version that he uses in the video? I think that in newer version espressif change the I2S API.
Thanks for your comment. I was trying to compile on a newer version and wondering what could be wrong since the code compiles but doesn't work. Now working on 1.0.6
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"?
Could instead of creating the video signal, the esp32 take external composite video signal and create an text or sprite overlay in it ?
Forgive me for asking, but will this apply to the ESP2866, can there be composite video out on the ESP2866? Thanks in adance
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.
Great video again!
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.
That is great, but is it possible to do the opposite? From analogue to digital/
You blew my mind again 😐
Does this mean you can theoretically simulate a composite video signal using a PC through the Sound card?
Very, very impressive!
Unfortunately the link to the document no longer exists.
So it's possible to make a screen cast module using wifi ?
When you say you can't do colour... why not? PAL colour carrier is exactly a third of your sampling rate! If you have DMA feed the i2s and you have the second processor preprocess a line before sending it off to the DMA to embed the carrier, why would you not get colour? Even with NTSC it might be possible, but the period of sine wave data you need to store could turn up a bit iffy.
it might be possible... but you can't get exact phase with just 3 samples. there will be hue shifts, pulsing and moire ... but I'll try
HI! I'm just getting into hobby electronics and arduino and I have a question, is it possible to input video from a runcam with this micro controller? Thanks in advance!
Is there any way to create an active menu system for lcd screens with esp 32? I need it to be separate to the video signal so that even when the video does not display the menu still does. Almost as if it overrides the select pixels to create the menu interface.
How about use 2 dac0808 for signal and color
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.
very nice explaination
One could also connect a PS/2 keyboard and have a cheap retro computer with screen, WiFi and Bluetooth.
**BOOOOOOM** (mind blown)
You, Sir, are _good_!
How about implementing a tiny Basic (or any other starter language) interpreter, add an interface for a keyboard (aka. a DIY keyboard!) and have the tiniest retro learning computer possible! All of a sudden old TVs are of value again...
step by step ;)
A lua interpreter with keyboard and video would be great...