All Questions
392
questions
46
votes
3
answers
23k
views
Create rtsp stream based on opencv images in python
My goal is to read frames from an rtsp server, do some opencv manipulation, and write the manipulated frames to a new rtsp server.
I tried the following based on Write in Gstreamer pipeline from ...
24
votes
3
answers
31k
views
GStreamer vs FFmpeg
I try to record a Video with the OpenCV Framework an would like to save that into an Matroska(mkv) Container together with some additional data streams.
First I thought using FFmpeg is the way that.
...
- 249
19
votes
4
answers
30k
views
Compiling Opencv with Gstreamer, cmake not finding GStreamer
I want to build opencv with GStreamer support.
I built the GStreamer from source (version 1.8.1) following this guide:
http://kacianka.at/?p=145
I have 'gstreamer_build' folder at my home directory ...
- 1,150
17
votes
3
answers
23k
views
Adding opencv processing to gstreamer application
I'm trying to do the following: receive video stream using gstreamer and process it with opencv. I've found few solutions, and one of them is to write video into (from gstreamer) fifo and then read it ...
- 1,416
14
votes
2
answers
26k
views
How to write opencv mat to gstreamer pipeline?
I want to add some opencv processes to a gstreamer pipeline and then send it over udpsink.
I'm able to read frames from gstreamer like this:
// may add some plugins to the pipeline later
cv::...
- 705
13
votes
1
answer
42k
views
How to open a GStreamer pipeline from OpenCV with VideoWriter
I am capturing video frames with OpenCV VideoCapture. The capturing works fine as I am able to use the frames like this:
cv::VideoCapture cap("v4l2src device=/dev/video1 ! videoscale ! videorate ! ...
- 213
12
votes
1
answer
19k
views
Write opencv frames into gstreamer rtsp server pipeline
I'm trying to put opencv images into a gstreamer rtsp server in python.
I have some issue writing in the mediafactory, I'm new to gst-rtsp-server ancd there's little documentation so I don't know ...
- 760
12
votes
2
answers
32k
views
GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
I am using the OpenCV package with the face_recognition package to detect faces on my laptop webcam.
Whenever I run it, the code runs fine but I run into the same GStreamer error.
from imutils.video ...
- 141
11
votes
3
answers
10k
views
Gstreamer - Convert command line gst-launch to C code
I have been making a few experiments with GStreamer by using the gst-launch utility. However, ultimately, the aim is to implement this same functionality on my own application using GStreamer ...
- 1,919
11
votes
1
answer
12k
views
gstreamer critical error when trying to capture video using webcam python opencv
i'm trying to take a video with webcam using opencv and python with a simple code
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
print('cap.isOpened')
if cap.isOpened():
print ('cap is ...
- 111
10
votes
2
answers
22k
views
How to convert a video (on disk) to a rtsp stream
I have a video file on my local disk and i want to create an rtsp stream from it, which i am going to use in one of my project. One way is to create a rtsp stream from vlc but i want to do it with ...
- 1,066
9
votes
2
answers
21k
views
Using custom camera in OpenCV (via GStreamer)
I'm using Nitrogen6x board with ov5640 camera(mipi).
The camera is not using standard v4l/v4l, but we can stream video using GStreamer for its driver (mfw_v4l):
gst-launch mfw_v4lsrc ! autovideosink
...
- 1,081
8
votes
2
answers
5k
views
Add some OpenCV processing to a gstreamer video stream
I'm trying to have OpenCV process a frame in the middle of a gstreamer pipe.
I have one gstreamer pipe generating the stream, sending it to appsink for OpenCV code to receive:
v4l2src ! ...
- 1,083
8
votes
0
answers
679
views
Building an RTSP streaming server from processed frames in OpenCV
I have to process frames from a distant camera using OpenCV.
I need to stream the processed frames to be accessible over network as a live video.
How to make the processed frames (cv::Mat objects) ...
- 1,896
7
votes
4
answers
6k
views
failure in compiling opencv with cap_gstreamer error
I am trying to compile opencv on Slackware 4.1. However I encountered the following error each time.
In file included from /usr/include/gstreamer-0.10/gst/pbutils/encoding-profile.h:29:0,
...
- 71
7
votes
2
answers
3k
views
Read RTSP Stream from UDP sink using Python OpenCV and GStreamer
We're developing a software to stream videos from two different cameras with RTSP using GStreamer. To simplify the acquisition process, we're using OpenCV with Python 3.
The problem is: we wanna push ...
- 1,469
6
votes
1
answer
13k
views
Write in Gstreamer pipeline from opencv in python
I'm trying to stream some images form opencv using gstreamer and I got ome issues with the pipeline. I'm new to gstreamer and opencv in general. I compiled opencv 3.2 with gstreamer for python3 on a ...
- 760
6
votes
2
answers
5k
views
GStreamer pipeline + OpenCV RTSP VideoCapture does not work in Docker container
I'm trying to get GStreamer + OpenCV RTSP video capture working in a Docker container based on a NVIDIA PyTorch image. I had to end up building OpenCV from source to enable GStreamer integration, ...
- 26.2k
6
votes
3
answers
23k
views
Install gstreamer support for opencv python package
I have built my own opencv python package from source.
import cv2
print(cv2.__version__)
prints: 3.4.5
Now the issue I am facing is regarding the use of gstreamer from the VideoCapture class of ...
- 1,508
6
votes
0
answers
3k
views
Have trouble streaming RTP/ RTSP stream from OpenCV-Python
I am trying to use this sample script I found here in order to take OpenCV images and convert them into a rtp/rtsp stream:
https://github.com/madams1337/python-opencv-gstreamer-examples/blob/master/...
- 2,131
6
votes
0
answers
854
views
Python OpenCV memory leak
After each execution of the code, 150 MB of memory leaks out.
cam = cv2.VideoCapture('rtsp://admin:[email protected]:554/Streaming/Channels/101')
ret_val, img = cam.read()
ret_val = cv2.imwrite(str(...
- 61
6
votes
3
answers
7k
views
Lossless avi encoding on linux
I am trying to write video using opencv. It is important for me to do this precisely - so it has to be a lossless codec. I am working with OpenCV 2.4.1 on Ubuntu 12.04
Previously, I was using the ...
- 761
5
votes
2
answers
13k
views
How to create x264 RTSP server with OpenCV Python with GStreamer backend
My goal is to create a RTSP server using OpenCV Python using the GStreamer backend.
I have RGB images stored as OpenCV Mat, and I would like to create a VideoWriter which can write to a RTSP sink. The ...
- 1,201
5
votes
2
answers
6k
views
Enumerate over cameras in Python
I'm having some trouble enumerating over cameras in Python over multiple OS's.
Here's some of the approaches I've tried:
import cv2 as cv
num = 0
while 1:
cap = cv.VideoCapture(num)
if cap....
- 61
5
votes
1
answer
8k
views
How to optimize frame grabbing from video stream in OpenCV?
I ran into a problem problem of low frame capture efficiency in OpenCV.
Hardware & Software.
Raspberry Pi 3 (1,2 GHz quad-core ARM) with HDMI Display
IP camera: LAN connected, RTSP, H264 codec,...
- 71
5
votes
0
answers
521
views
python opencv display gstreamer videotestsrc
I need to use GStreamer to deliver data to some OpenCV/Cuda classification and deep-learning systems.
The problem is that I'm new to the GStreamer and the Cuda, so I need to make some simple examples ...
- 91
5
votes
1
answer
2k
views
Modifying a webcam stream
Currently I'm working on a project where I need to modify a webcam stream that is streaming to skype. Essentially I want to do things like blur the face and do other anonymizing techniques.
While ...
- 63
4
votes
2
answers
10k
views
Convert YUVj420p pixel format to RGB888 using gstreamer
im using gstreamer 1.2 to feed frames from my IP camera to opencv program
the stream is (640*368 YUVj420p) and i want to convert it to RBG888 to be able to use it in my opencv program
so is there ...
- 192
4
votes
3
answers
2k
views
Lossless codec for bayer data
I'm working with lots of camera's which capture in BG bayer pattern natively.
Now, every time I record some data, I save it to the disk in the raw bayer pattern, in an avi container. The problem is, ...
- 598
4
votes
1
answer
566
views
Which video library is OpenCV using under the hood on linux? [closed]
I'm writing a simple software to capture and record webcam images to a compressed video file. I'm using OpenCV "VideoCapture read(frame)" and "VideoWriter write(frame)" in a C++ software.
I'm on ...
- 1,011
4
votes
3
answers
5k
views
Error in using Appsrc Appsink
This would be my first time working with Gstreamer in a C program. I've only used pipelines. I'm trying to write a program which takes a stream stores it in a buffer, uses OpenCv to edit the stream ...
- 81
4
votes
0
answers
2k
views
How to create GStreamer RTSP server with variable frame rate
I have an application which requires me to consume an RTSP stream, extract frames from the video, perform some processing on the video frames, annotate the frames, then restream the video as a new ...
- 1,201
3
votes
1
answer
16k
views
convert gstreamer pipeline to opencv in python
I have created a network stream with following gstreamer commands:
sender:
gst-launch-1.0 -v videotestsrc ! video/x-raw,framerate=20/1 ! videoscale ! videoconvert ! x264enc tune=zerolatency bitrate=...
- 55
3
votes
1
answer
20k
views
GStreamer-CRITICAL **: gst_element_make_from_uri: assertion 'gst_uri_is_valid (uri)' failed
I am on Ubuntu 16.04 using OpenCV 3.1 in Python. I can run this fine for a large number of videos however in this particular video it fails. I am using XVID as coded. The URI seems to be correct so I'...
- 99
3
votes
1
answer
10k
views
Push images into Gstreamer pipeline
I have been following many examples about pushing an image into a Gstreamer pipeline but still I can't make my code work.
Any suggestion (beside telling me to try with Gstreamer1.0 instead of 0.10) ...
- 99
3
votes
4
answers
6k
views
Cannot receive gstreamer UDP Stream from OpenCV Gstreamer
I'm working on Gazebo Sim which uses 'Gstreamer Plugin' to stream Camera Video via UDP. Simulation is started on Ubuntu 18.04.
There is some resources to understand backend of this structer.
Gazebo ...
- 131
3
votes
2
answers
3k
views
Sending frame by VideoWriter; can't catching it again (OpenCV 3.1, c++)
I am trying to write a simple video streaming application that performs the following tasks:
Get a frame from camera this part is working);
Modify frame;
Send to a gstreamer pipeline.
Code:
...
- 41
3
votes
1
answer
9k
views
Gstreamer pipeline in Opencv videoCapture()
I'm trying to open an IP camera in OpenCV using gstreamer pipleine.
I can open the IPcamera using Gstreamer in terminal, using :
gst-launch-1.0 -v rtspsrc location="rtsp://192.168.0.220:554/user=...
- 179
3
votes
2
answers
11k
views
How to push OpenCV Images into GStreamer Pipeline to stream it over the TCPServer-Sink
I'm trying to push Images created by OpenCV into the GStreamer-Pipeline in order to stream a video through the GStreamer-TCPServerSink.
My GStreamer-Pipeline looks as follows: AppSrc -> ...
- 555
3
votes
1
answer
8k
views
Access Camera using OpenCV (Via GStreamer)
I'm trying to develop an application which should analyse a video stream from a MIPI camera(5MP). So I'm using gstreamer to get the video feed access it using OpenCV. I tried the following pipeline ...
- 1,519
3
votes
1
answer
3k
views
Push OpenCV mat inside a DeepStream pipeline
I would like to open a video stream by OpenCv and push frame by frame inside a DeepStream pipeline to use tesornRT to make an inference on Yolov3 model, but i do not know how to make it works.
I'm ...
- 71
3
votes
2
answers
7k
views
Displaying RTSP stream with OpenCV and gstreamer
I have purchased an IP camera which I am trying to connect to using RTSP. The RTSP connection URL is rtsp://admin:@192.168.0.27/channel=1&stream=0.554. I am using OpenCV to open and display the ...
- 1,201
3
votes
2
answers
6k
views
How to use Opencv VideoWriter with GStreamer?
I am trying to transfer a h264 stream using Opencv VideoWriter to get it on another pc on the network using VideoCapture. However, I am stuck on VideoWriter. Execution of this code returns with an ...
- 53
3
votes
2
answers
3k
views
Efficient way of sending a large number of images from client to server
I'm working on a project where one client needs to take several snapshots from a camera (i.e. it's actually taking a short-duration video, hence a stream of frames), then send all images to a server ...
- 33
3
votes
1
answer
6k
views
Yocto how to add a gstreamer plugin?
I'm trying to build a custom image for an i.MX6 board by using Yocto.
I want to add the plugin 'gstmotioncells' from Gstreamer OpenCV Plugins ( https://github.com/GStreamer/gst-plugins-bad/tree/...
- 111
3
votes
1
answer
14k
views
Gstreamer stream is not working with OpenCV
I want to use a Gstreamer pipeline directly with OpenCV to manage the image acquisition from a camera. Currently I don't have the camera so I've been experimenting getting the video from URIs and ...
- 83
3
votes
1
answer
6k
views
Gstreamer Appsink not getting Data from the Pipeline
I am designing a pipeline to Encode a video frame from a opencv application (got from a web cam) to video/x-h264 format, send it via network and decode it on another device of different type (probably ...
- 355
3
votes
1
answer
3k
views
Calling Gstreamer inside openCV
I need to call Gstremaer inside an openCV code (opening a video camera essentially).
As I looked through the source code, modules/highgui/src/cap_gstreamer.cpp seems to be the file I'm looking for.
I ...
- 1,081
3
votes
2
answers
3k
views
Piping video from Raspberry Pi to Desktop running OpenCV
I'm looking for some hints. I've got my Pi running OpenCV, but I'm about to take on a project which will need several IP cameras, all piping video to OpenCV. I'm curious if it's possible to use the ...
3
votes
4
answers
6k
views
how combine gstreamer and opencv?
I want to use OpenCV to analyze (parts of) frames taken from a webcam taken at its native resolution of 1280 by 960. I can capture these using Gstreamer and an appsink. I've come to realize, however, ...
