Questions tagged [video]
Specify video format, e.g. NTSC, ATSC, VGA, etc.
371
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Smooth and no-flickering dimmable light source
My goal is to record a video with a varying intensity light source.
No flickering at any frame rate (frame rate 30 60 120 240) while watching frame by frame, not human eye.
Smooth dim level
Any type ...
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1
answer
590
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Record video from webcam w/o microcontroller [closed]
I managed to salvage a webcam from a broken laptop, and I'm looking to use it to record video in a small package to attach to a rocket. However, I need to record the video to some data medium like a ...
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How to match impedance when driving 75ohm differential video amp with single ended RS-170 video output?
I am trying to feed RS-170 video signal from a single ended amp to a differential 75 ohms video amp. When I connected RS-170 signal to + of the differential and RS-170 return to - of differential, ...
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Use 4-pin S-video cable connector on RGB LED?
I'm hoping to make some 4-pin RGB LEDs (R, G, B, GND) easily hot pluggable, so I'm wondering if 4-pin S-video connectors could be used.
Now, 2 of the pins on a S-video connector are GND, so would ...
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Video Standard White Levels, RS-170 or RS-343
I have a customer defining some equipment which outputs analogue video. They have said it would be to NTSC RS-170A standard Y C (on a S-Video, Mini Din connector), however I'm not sure if they really ...
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1
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Transmitting AV signals one way
I have a video feed that's two AV cables (one sound, one video) and I'm looking to transmit them from the source to about 100-200 meters away. Specifically, I need some sort of transmitter/receiver ...
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1
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Turning an old digital point and shoot camera into a webcam [closed]
I have an old 5 megapixel Sony Cybershot DSC (I think it's this one) lying around somewhere, and since it is pretty much obsolete (but it shoots great quality 640x480 video) I keep wondering if I ...
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Serial Camera recommendations? [closed]
I have an altera stratix iv FPGA, given to me by my professor to do a project that involves video processing.
The ports I have to work with are RS232 (female), an IDE port and several SATA ports, and ...
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Generating three voltages with a MCU
I'm going to try and generate black and white NTSC video, using a micro-controller. According to this:
https://instruct1.cit.cornell.edu/courses/ee476/video/
It is possible to do it using two pins ...
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1
answer
535
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Can anyone identify this type of connector
I have a Lawmate 2.4 Ghz Video transmitter which has a small 4 pin input plug. I want to find out what the proper name for this type of connector so I can buy spares for it - maybe someone here can ...
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Obtaining analog video from car LVDS interface theoretical question
Got a theoretical question.
A car has 4(5 with GND) pin FAKRA connector between head unit (NAC) and head display. 2 of them are mentioned as LVDS+ and LVDS-.
As far as I understand, it's 2-way gigabit ...
- 125
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141
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Can I use a standard flex cable to extend the sensor module cable in a GoPro 11 Mini?
I would like to heavily modify a GoPro 11 Mini, one aspect of the modifications I have in mind is to relocate the sensor module. The issue with this is that it's flex cable is very short so I would ...
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Pros and cons connecting R2R directly to FPGA/CPLD
I am designing the R2R-based DAC circuit (5 bits per channel) for the video output @ 25.17 MHz. Looking for advice to ensure I didn't overlook something very important.
Initial design was CPLD -> ...
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Need help connecting a speaker to a video card
I have this video card which uses a 4-pin JST connector for the speaker:
PL+ PL- PR- PR+
I was using this speaker which has a 4-pin JST connector:
What I thought is:
One red wire is for the left (...
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2
answers
96
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Why does the LM1881 make an odd/even signal even with progressive inputs?
I noticed that when I apply a 720p or higher signal to an LM1881, the odd/even pin outputs a square wave signal which it shouldn't. On 240p it doesn't, as expected.
Did I miss something? My input is ...
user321329
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How to send AHD video wirelessly to an Android device (short range ~3m)?
I have an underwater camera (wired to the water surface) which streams AHD digital video to a RG59 connector.
I would like be able to stream the video to an Android device.
It doesn't have to be a ...
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How to control a 12V relay from variable voltage source of a LED?
I'm new to electronics and need your help.
I have retrofitted a Chromecast to my car and have powered it using a cigarette lighter power adapter to USB. Currently the power adapter is hidden and ...
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306
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Sync stripper circuit for RGsB to RGBHV converter
Currently, I have a RGsB signal source, ISL59885 sync separator and RGBHV monitor. Green is the same on the input and output connector (meaning, sync-on-green, not the perfect clean green signal).
...
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431
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How to convert composite AV signal or RGB to luma (grayscale)?
As the title says- how can you convert composite signal into luma?? As we all know, composite is just what it says, composite video with grayscale and color signal combined and luma is just grayscale. ...
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Does it take more power (battery-life) to stream video or to do local video processing?
I have a raspberry pi with a camera. I want to take analytics from the video (mostly object detection). This doesn't have to be run in real time and the RPI doesn't need the output of the video ...
user146255
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0
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Where to start designing a ~1Hz to ~60Hz square wave oscillator as a switch for a Klomp dirty video mixer?
So I built this circuit and in messing around with it I found if I switched quickly between a camera (feedback) source and a video source in quick succession with the switch I obtained an ...
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How to simulate a composite video input signal in ltspice
I want to simulate this video driver circuit (i think it's called that) in ltspice
I found this design from this very nice video: https://www.youtube.com/watch?v=lqSiMKwfZsY by the videolabguy.
To ...
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How can a ground loop cause a OSD to flicker / dissapear without affecting the rest of the video?
I don't know if it is best to ask this question here, or on drones.stackexchange.com, but I think that I am more likely to get a good answer here even if i might have to provide a bit more background.
...
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1
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67
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HDMI Video to RCA Audio [closed]
Some 20 years ago I created an audiovisual art installation, connecting RCA Video output from a TV set to a HiFi system's audio-in, just plain via cable, in order to "hear" the video signal. ...
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How can I gate the output of this phase detector?
I want to make a PLL which will lock to the subcarrier of a composite video signal during colourburst. The colourburst is present for about 2.25uS of each scanline which is 64uS long. So during that 2....
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575
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Connect an I2C camera to computer via USB as a webcam
I took out of an old security camera its circuitry and I am trying to figure out a way to connect it via USB to my computer and use it as a standard webcam. Is it possible? Here are the front and the ...
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1
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102
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Finding an analog switch IC (BBM & SPDT) for video signal
I'm looking for a SPDT analog switch IC with Break-before-make to switch between video signals. However, the amount of options available leaves me overwhelmed with no clear option in sight.
I've ...
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I want to make a photo-trap for wildlife
I want to make a photo-trap with extra features.
I tried using a Raspberry Pi for this, but I could not start the system in under 4 seconds.
When other photo-traps detect motion, they start ...
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186
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Choosing capacitors for AD725 encoder
This question generally applies to many situations, but in this case I am trying to figure out the best choice (no limit to the perfection).
I am stuck at both input coupling capacitor and output ...
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Why would sdi to hdmi work, but not when I convert sdi to hdmi to dvi [closed]
I am transmitting video over sdi and converting from sdi to hdmi with an aja Hi5. This works, but if I convert that hdmi output into dvi, the output is either not detected, or constantly connects and ...
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2
answers
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Is there equalizer on the monitor's HD-SDI interface
Is there usually an equalizer on the monitor's HD-SDI input interface? In fact is it an requirement for HD-SDI monitors? Maybe HD-SDI signal is attenuated too much at the input of monitor, but ...
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Light illumination method for video camera and CV detection
My control application implements human face detection and recognition with using of CV library. My device uses usual VGA USB video camera.
Problem:
Good and uniform light illumination allows ...
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1
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194
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How can I attenuate a video signal in discrete steps using digital control? [closed]
I would like to use a μController to adjust the brightness of VGA/EGA RGB signal.
My intention is to allow for a setting from "full brightness" (0% attenuation) to "completely dark/black" (whatever ...
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232
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Power over coax standard
We are specifying a system to use power over coaxial cable, that will transmit SDI video.
Is there any standard (IEEE or otherwise) for implementing it?
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How is vertical sync done in YPbPr component video
All the literature I have read about YPbPr component discusses only the horizontal sync, but I have not found anything about vertical sync.
- 117
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4-layer video experimenter's board layout, critique sought
This is a layout for an ADV7184 video DAC, connected to an ADV7341 video encoder. The intention is to allow a microcontroller such as an Arduino or STM32 to generate text and graphics over the video ...
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How to enable auto detect AV inputs using dummy signal instead of actual video?
I got a TV with a cracked screen that otherwise works fine, which I managed to change the inputs to "AV" (3 RCA jacks). So I amputated the screen and now have a mini stereo with remote. The only ...
user160409
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2
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Video scaling vs Display scaling
I am going to start a project in FPGA and "graphical screen" scaling. I am still in the "reading-the-material-phase".
Are there any differences between video-scaling and display(e.g. Windows Desktop)-...
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Demux from 1 camera to 3 DVR's
Recently I have been experimenting on DVR devices. I have one camera however I want to demultiplex it to three 16ch DVR devices.
I have been able to create a daisy chain to connect all 16 channels of ...
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2
answers
4k
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Convert BNC to Ethernet to Coax/HDMI
I need to make a cable run of approximately 150 feet. The source is a security camera box and the destination is a large ~42" television with all the basic hookups.
The source box is in a room right ...
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Streaming video from Beaglebone over Xbee module
I would like to stream a video feed from a camera connected to a Beaglebone Black wirelessly. However, we are talkig distances of over 4Km so I don't think a regular 2.4GHz connection would cut it. I ...
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composite (RCA or A/V jack) output Passive splitter
Im trying to connect one CCTV camera feed to a TV and an USB composite encoder at the same time.
my question is, would something like this do it?
I have doubts about impedance issues, in which case ...
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2
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1k
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Using 3 Channel Video Switcher Module with Arduino
Hey all I am wondering how to go about switch from camera 1, 2 or 3 using this 3 Channel Video Switcher Module on ebay here.
Since there's only V+, V- and signal for the "switch" it looks to take a ...
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2
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How to solve speed issues in a double buffered + video overlay system
I've decided to start a small project over this break for creating a very simple GPU. As far as the GPU will go for now is simply receiving pixels and outputting pixels to SDRAM. In addition, there is ...
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2
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356
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Identify IC with label removed [closed]
I have an IC which is used for a display that has the IC chip number scratched off. The reason being more than likely that the board would be fairly inexpensive to produce but the combo board and ...
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-1
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1
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851
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IP Camera IC (PAL to Ethernet)
I have a design problem to capture CCIR/PAL video from the camera that is available and send it over ethernet. Need to come up with my own printed circuit board design, having no prior experience in ...
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Is this the correct connector to receive and split out an S-Video cable
I am looking for the correct connector to receive and give me access to each of the 4 signals on an S-Video cable. I have found this:
http://uk.farnell.com/pro-signal/psg01568/socket-mini-din-4pole/...
- 454
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1
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89
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Convert Composite Video to RS-422 [closed]
I misinterpreted my requirements and asked the question below, which does not make sense.
I am designing a Digital (TMDS/HDMI) to Analog (Composite) video circuit. I am almost to the end. The last ...
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3
answers
383
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MCU Based Video Processor [closed]
EDIT: Clarify scope of question.
I am planning to create a homemade Z80 computer.
One thing I have been disappointed with about other designs is the lack of color graphic output, they all had text ...
-1
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1
answer
4k
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Translating 5-wire camera output to composite signal
An existing OEM rearview camera has 5 wires (V+, LVDS+, LVDS-, LIN, ground). Is there a way to translate (hook up) this to a standard composite cable that goes into back of a aftermarket head unit?
...
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