Questions related to computer oriented video capture and the programming tools and solutions for dealing with captured frames from a video.
Questions tagged [video-capture]
2460 questions
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opcv videowriter, i don't know why it does'nt work
I've just written a first program for videocaptur and videowriter. I copied the source from the wiki and changed the only video file name, but it made error.
Here is the source from the wiki.
The opencv is 2.1 and the compiler is visual c++ 2008…
sirupa
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recording video like "Talking tom" iphone (issue in adding audio)
I have to record a video of app exactly similar to "Talking tom".
Taking help from Here and Here i have captured screen and made a video using those images but that does not has any sound.
I have recorded both sound and video files separately but…
sajwan
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matlab live video extraction
How do you take a live video feed from a webcam and selectively extract frames of it? Do I need a special toolbox or can this be done through normal matlab functions?
I have the image acquisition toolbox, but haven't seen a good way to use it for…
mugetsu
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Android record video with options
I want to record video with certain options. Like maximum duration, quality etc.
Is it possible to do that without custom implementation - just by calling intent?
Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
//add custom options…
Martynas Jurkus
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Gstreamer record webcam audio and video sync
I'm using Gstreamer to record audio+video from a webcam to a file, and their sync is off. I can see a delay in playback from the MKV file.
Can someone see a problem in my command?
C:\gstreamer\1.0\msvc_x86_64\bin\gst-launch-1.0 -m -e -v
mfvideosrc…
Aviv Hurvitz
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In camerax, video capture, preview view and image analyzer usecases not working together
While using Camerax, when I combine video capture, preview view and image analyzer usecases, preview becomes blank for android 12, but working on 11 and 13.
cameraProvider.unbindAll()
val camera = cameraProvider.bindToLifecycle(
…
Negizzz
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openCV format equivalent to gstreamer gray16-be
I have a device creating raw frames and placing them in memory pointed to as a uint32_t* that is allocated for the frame size. The data is packed bytes with no padding as 1460 pixels, 1920 lines and 2 bytes per pixel. I am trying to display the…
Pasonis
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Error opening video file logged using codec H264 or hevc using Opencv VideoCapture
I opened a .avi video file and written to a new .avi using cudacodec videowriter using h264 and hevc code. It is successfully logged. Again while opening the logged video file using video capture giving error.
Open could. Ot find decoder for…
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opencv Video-capture can not opencv rtsp
when I was using a webcam and trying to get the rtsp stream with OPENCV::VideoCapture,but it always fails to open, I dont know how to deal with it...
Here is my…
asabopp
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OpenCV VideoCapture Unable To obtain Frame
I would like to achieve the requirement of obtaining real-time camera feed from the currently connected camera on a Windows operating system using C++ environment. However, after multiple attempts and debugging, I have found that my computer is…
AaronWu
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1 answer
Can't parse a h265 stream
I'm trying to parse a stream from a h265 camera. The live555 library give me frames which I get in afterGettingFrame(). There I parse them to get NALUs by their header "0x00 0x00 0x00 0x01". After I parse the next byte of NALU and get is it "I"…
denn
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Opencv python high framerate issue
I'm trying to record a video (640 x 360 MJPEG) with this camera using python and opencv but i can't get to the camera rated FPS.
This is the snippet I'm currently using:
stream = cv2.VideoCapture(1,…
Ruka
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Windows Forms Video Capture to pictureBox Without Distortion
I am trying to get normal video output from my camera inside of my windows forms application. Since it was cropping the video output otherwise I am resizing it. I made the picture box size 640 to 360 so it should be half of my 1280 to 720 built-in…
Ugur Alp Balta
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How set specific fps in opencv when reading camera
The camera has several modes, but you can only turn on one.
v4l2-ctl --list-formats-ext -d 2
ioctl: VIDIOC_ENUM_FMT
Type: Video Capture
[0]: 'MJPG' (Motion-JPEG, compressed)
Size: Discrete 1920x1080
Interval: Discrete 0.033s (30.000…
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Issues with v4l buffer cleaning
I've been trying to write a c program to capture photos from a uvc camera using v4l. I've managed to gt it to work for the most part but every second time i run the program i get a zero-filled yuv buffer which results in a "blank" green image. I…
Hristos
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