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I'm trying to capture a USB camera video as a series of MJPEG images. I'm using this official example as a base. Please refer to it, since it's quite long to paste it here. The only thing I changed is ...
nikitablack's user avatar
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1 vote
1 answer
172 views

My goal is to capture video using V4L2, and testing it with a virtual video device created by v4l2loopback. I'm feeding a dummy .mp4 to this virt vid device with ffmpeg which is located at /dev/video7....
Jamie's user avatar
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2 answers
90 views

I want to analyze video using OpenCV in Python on my Raspberry Pi 5 by capturing it through a Live Gamer Ultra GC553. I tried the following Python code on the Raspberry Pi: import cv2 cam_id = 0 cap ...
neg's user avatar
  • 1
0 votes
0 answers
38 views

I'm trying to use an Android MediaRecorder to record video. In order to limit the size of the file I want to periodically start a new video file, and just like the built-in Camera app I don't want to ...
Michael's user avatar
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0 answers
26 views

I want to use CameraX to implement a video recording feature, where I can apply a filter effect using OpenGL during the preview, and record the video with the filtered effect. However, I can’t find a ...
Charon Chui's user avatar
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1 vote
1 answer
400 views

I am facing an issue in iOS 18 that works fine in iOS 17 and earlier. This happens when you set the project to use Swift 6. The app has the Privacy - Camera Usage Description key in the Info.plist. It ...
Luciano Perez's user avatar
  • 151
1 vote
0 answers
722 views

I'm trying to record a video from a USB device with v4l2 framework and save it in MP4 format using FFmpeg. My sample code successfully captures and saves the video, but I'm running into some issues: ...
Reena's user avatar
  • 11
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0 answers
169 views

I want to capture incoming video of other user(s) on a WebRTC Live Stream (Example: GMeet), without recording my screen. I found a similar question, and a chrome extension, but they don't work anymore....
Asmit Karmakar's user avatar
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1 vote
0 answers
122 views

I have the following shader where I expect to write an overlay onto a video frame, but the result is an overlaid image which is stretched horizontally by a factor 2. What could be causing this issue? ...
Lars Rönnbäck's user avatar
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1 answer
144 views

I'm using pims library (https://github.com/soft-matter/pims) to access frames from .MOV file with over 25K frames, 3840 × 2160, H.264 (High Profile), 60fps. import pims from time import perf_counter ...
Paul Jurczak's user avatar
  • 8,628
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0 answers
126 views

On my Windows 10, application I use VB6 and ffmpeg.exe to capture video from USB capture device. I need to show complete list of supported formats by this capture card. When I use below command I get ...
gaamaa's user avatar
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2 votes
0 answers
56 views

I am trying to display a video stream received from an ffmpeg stream. ffmpeg -f x11grab -framerate 60 -video_size 1920x1080 -i :0.0 -c:v libx264 -preset ultrafast -tune zerolatency -b:v 3M -f mpegts -...
Robertzzel's user avatar
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0 answers
87 views

I have this code in my esp32-cam there is no error, but when 20 seconds of video is recorded, an AVI file is created in the SD card, and it has no size, it is 0 KB and it doesn't show anything. No ...
Mr.Programmer's user avatar
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1 answer
408 views

I wanted to upload the code in this link to my esp32-cam so that I can save the videos recorded by the camera to the sdcard. But I encountered the following error while uploading: C:\Users\Hacker\...
Mr.Programmer's user avatar
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1 vote
1 answer
206 views

I'm rigging up some additional security cameras for my home office, and while I have battery backup in case of power loss, and auto startup for the code I developed, I would like the video files to be ...
ndtech's user avatar
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0 votes
1 answer
102 views

For a friends master thesis I have started creating a small video recorder app, so her participants can record themselves (also because I wanted to use this API :) ). I'm in the early stages of this ...
Feldmanovitch's user avatar
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2 votes
0 answers
159 views

I am developing a windows desktop application to record video in .mp4 format from a USB camera using the Media Foundation Capture Engine sample code. In this application, everything works fine until I ...
Jenny Jack's user avatar
  • 21
0 votes
0 answers
119 views

We are using the following Python script combined with OpenCV to record video of salmon migration in order to estimate total fish passage, import cv2 import numpy as np import time import datetime ...
portsample's user avatar
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0 answers
83 views

I hope someone can give me some Pointers. I want to use Rust to call the Windows api for a feature that fetches the contents of an occluded window. I tried DGI method, but BitBlt method could not get ...
Strawberry's user avatar
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0 answers
49 views

Apologies if this is out of format, this is my first time on Stack Exchange! I've been trying to build a project that functions like a real-world equivalent of Nvidia's Shadowplay feature--a camera ...
Amy Green's user avatar
  • 1
0 votes
2 answers
823 views

Recently, I've been trying to implement a 60 fps low latency screenshare with C# with a library called Sipsorcery. I've tried my best so far to maximize the frames but i only get around 20 fps. I ...
Deve loper's user avatar
  • 9
0 votes
1 answer
597 views

The pipewire repository has an example of capturing video from a webcam. The window that opens displays video from the webcam. How to capture video from the desktop, not from the camera? That is, so ...
ibse's user avatar
  • 625
1 vote
0 answers
38 views

Are there any video formats out there that support writing in a rolling fashion? e.g. if I have a mmap/file that is the size of a 3 seconds video (1920x1080) at 30fps, I want to write frames to it ...
captain's user avatar
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0 votes
0 answers
46 views

Hello and thank you for your time, I am recording a video which is mirror-playing in a canvas from that canvas. The original video is seated in a normal tag. When recording the volume of the recorded ...
Paul's user avatar
  • 116
0 votes
0 answers
79 views

I have a esp32cam with a stream on a webserver. When I try to open the stream with opencv it gets stuck import cv2 from PIL import Image, ImageTk raw_stream = cv2.VideoCapture() raw_stream.open("...
ByOle1307's user avatar
  • 1
0 votes
0 answers
37 views

It returns true that it is starting the recording, but when ending the recording it does not save the file in specified saveDirectory Also checked with File(recordPath).exists() it returns false, no ...
Ryan Himongala's user avatar
  • 1
0 votes
1 answer
2k views

I am using OpenCvSharp's VideoCapture class to capture images from a camera, from which I use to display as a video stream. I am using this camera that is attached via USB. The problem that I have is ...
Jorge A.'s user avatar
  • 65
0 votes
1 answer
136 views

I am writing a python script to capture the screen to a video but the resulting video file is only 8k long and there is no video in it. My code looks fine to me and I can see the captured frames which ...
Michael McLaughlin's user avatar
  • 175
0 votes
0 answers
70 views

After much trial and error I have succeeded in grabbing still images from the laptop's built-in camera. But I have noticed a memory leak and spent days trying to pin it. So I have stripped the code to ...
kppodd's user avatar
  • 15
0 votes
0 answers
86 views

I am trying to create custom video controls for my react native app but it seems like I am missing something. Currently only the pause/play functionality work. The fast forward/ rewinding and slider ...
elvis obondo's user avatar
  • 41
0 votes
0 answers
100 views

For a professional application I'm using a video grabber to capture realtime the video output of a PC, having various resolutions (Full HD to 4K) and incapsulate it into a RTP stream with RTSP ...
M.Bolzoni's user avatar
  • 59
1 vote
0 answers
63 views

I'm trying to write a video recorder class with ffmpeg, but video file generate have a issue. In every record, the second 1 of the video is a dark frame, and the second 2 is single frame, repeated 25 ...
Jorge Augusto Wilchen's user avatar
  • 43
-1 votes
1 answer
251 views

I tried capturing video using Raspberry Pi 4 Model B 8GB RAM and OS of 64 bit. But unable to capture a video due to c2 error. Along with that I'm having no camera in interface option so I updated then ...
bs_Govind bs_Govind's user avatar
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0 votes
1 answer
66 views

Is there any to tell what the meaning of video capture properties that aren't defined in the official documentation? For example, import cv2 cap = cv2.VideoCapture(filename) Video properties can be ...
DanGoodrick's user avatar
  • 3,240
1 vote
1 answer
88 views

I'm writing a program that will analyze a video frame-by-frame. The program is supposed to calculate the height of an object that is varying through time. I used the fact that the top of the object is ...
user avatar
1 vote
0 answers
117 views

I am looking at the 420v (kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange) and 420f (kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) options offered via AVCaptureDevice.Format when setting up an ...
tenuki's user avatar
  • 369
0 votes
1 answer
402 views

I have a thread dedicated to reading frames from a camera, aiming to read at a specific frequency (self.target_fps). Therefore, I need to perform a read every self.target_frequency = 1 / self....
giulius's user avatar
  • 1
1 vote
0 answers
911 views

I am trying to use OpenCV in Python to read the feed coming from my Elgato HD 60 pro capture card but I keep running into errors. If you don't think OpenCV is the right tool for this I would greatly ...
HowDoISolveThis's user avatar
  • 128
1 vote
0 answers
436 views

I created a project using SIPSorcery that receives stream (VP8 or H264 format) from WebRTC, and saves it to video file (and photo if needed). The problem is, I cannot think how to convert that ...
Gartarr's user avatar
  • 11
0 votes
0 answers
76 views

I extracted a video from a VHS tape. The horizontal sync didn't trigger properly in many of the lines causing that line to be shifted, usually to the right. I wrote some code in an attempt to detect ...
Robert Lugg's user avatar
  • 1,202
1 vote
1 answer
362 views

I am trying to use the VideoCapture function from the opencv library. Due to the lack of webcam of my laptop, I've download CameraHub to access my phone's camera as the main webcam for the system. ...
Bùi Vinh's user avatar
  • 11
0 votes
0 answers
116 views

I use python to extract frames from video files. Specific now I use Open-CV. I know that the files is some how corrupted I knew that there is a chance that I could not extract the frames as I want to, ...
Hadas's user avatar
  • 1
2 votes
1 answer
575 views

Imagine a video call application where you allow the user to disable his camera stream (say, for privacy reasons) and in which it is also possible to take a picture with the camera to then send it to ...
jakobleck's user avatar
  • 189
1 vote
1 answer
215 views

My project is using MediaFoundation's Source Reader to capture and preview cameras, but I encountered the following issues when presenting videos using EVR. Code: #include <evr.h> #include <...
World's user avatar
  • 23
0 votes
0 answers
88 views

I have Raspberry pi 4 with 8GB ram, I have connected two USB webcams (Eternico Webcam ET101 HD) to it, I need to read video from both cameras at once for triangulation of detected objects. I am using ...
Andrej Vyšný's user avatar
  • 1
1 vote
0 answers
178 views

I have dockerized my app and I have used http://nvcr.io/nvidia/pytorch:23.10-py3 base image. I'll share my dockerfile with you. I am also using Ubuntu. The problem here is that videocapture method ...
Amirreza Hashemi's user avatar
  • 362
1 vote
0 answers
158 views

I use the Emgu.CV.VideoCapture class to capture an external camera connected via usb. However sometimes I have the problem that the capture seems to switch internally to my integrated laptop camera. I ...
nckstr15's user avatar
  • 109
1 vote
0 answers
102 views

I have four usb camers mounted via usb hub. they are video4,video6,video8 and video10. When I open the camera one by one, they works fine. When I open three cameras together, they still works fine. ...
HC S's user avatar
  • 25
1 vote
1 answer
148 views

I am trying to stream web camera to my application and while I have a workaround for various resolutions I would like to use camera capabilities to provide the image in different resolution. My ...
Robert's user avatar
  • 2,543
0 votes
0 answers
132 views

I want to modify the camera exposure while previewing the video capture from my webcam, while I am in a video meeting with Google Meet, Zoom, etc. I'm using the MediaCapture class in a WPF application....
yoyo's user avatar
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