I want to apply fisheye effect on video which is play in android device placed at sdcard of device, so if i open to play any selected video from sdcard its play with Fisheye effect on video in android device it is possible or not. If it is possible so please show me some snippet or hint to create fisheye effect on video. If it is not possible so please give me reason behind of this.
Thanks in advance for help.
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I use libvlc with vlc-qt to load, modify and show various streams and videos. It works well with all videos and streams which have top-left orientation. I have a video created with a smartglass, and it has top-right orientation.
When i opened this video with the vlc media player, it showed correctly, but when i loaded it to my program, it was upside down (because of the orientation).
How can i set it in vlc-qt/libvlc to automatically adjust the frames to the orientation? Based on the vlc media player, it must be possible somehow.
If it is not possible, i would be content with knowing how to get the video orientation from libvlc.
i would be content with knowing how to get the video orientation from libvlc.
libvlc_video_get_track returns a struct containing a field with orientation info.
Don't think you can rotate the video from libvlc API, you will need to provide CLI arguments to VLC through your wrapper/libvlc.
See https://wiki.videolan.org/VLC_command-line_help/
Video transformation filter (transform)
Rotate or flip the video
--transform-type={90,180,270,hflip,vflip,transpose,antitranspose}
Basically, I have a prototype ready with OpenCV that captures images from connected webcams. We need to ship it to customers and they include Surface Pro users, which has an integrated rear camera.
I am not sure whether it would work on that device or not i.e. whether my code would detect the integrated Surface Pro camera or not. We currently do not have access to such a machine.
So, is there a way validate this? I can think of two options:
Is there any emulator available for Surface Pro camera?
Does OpenCV provide a list of cameras which it supports?
Would really appreciate any form of assistance here!
OpenCV works via the OS camera drivers. If the Surface Pro camera appears as a normal camera to Windows OpenCV should see it as just another camera.
For record's sake - This Stack Overflow answer gives the code for iterating available devices.
And personally I can verify that OpenCV works with the Surface Pro cameras (front and rear). We are using the EMGU port of it.
I've been trying to figure out how to playback a video file that is equirectangular (and adding movement controls.) I got the playback part using SDK samples. However, getting the video frames to texture to add to a skybox seems downright impossible. I've already looked at the custom EVR and DX11 renderer but can't seem to understand how all that works. Anyone have any ideas?
Thanks.
I think it possible to implement you idea, but you must know that all default renderers are used for simple renderer video. However, you can write own implementation IMFMediaSink class for your purpose. Or use simple frame grabber. You can get more by link - videoInput. It web site contains code for grabbing live video frames from web cam and rendering them via texturing of square object in OpenGL - very similar of your need.
I'm building a web cam application as my C++ project in my college. I am integrating QT (for GUI) and OpenCV (for image processing). My application will be a simple web cam app that will access the web cam, show/record videos, capture images and other stuffs.
Well, I also want to put in a feature to add cliparts to captured images, or the streaming video. While on my research, I found out that there is no way we can overlay two images using OpenCV. The best alternative I was able to find was to reconfigure the whole image to add the clipart into the original image making it a single image. You see, that's not going to work for me as I have to be able to move the clipart and resize or rotate the clipart in my canvas.
So, I was wondering if anybody could tell me how to achieve the effect I want most efficiently.
I would really appreciate your help. The deadline for the project submission is closing in and its a huge bump on the road to completion. PLEEEASE... RELP!!
If you just want to stick a logo onto the openCV image then you simply define a region of interest (roi) on the destination video image and copy the source image to this (the details vary with each version of opencv)
If you want the logo to be semi transparent - like a TV channel ID - then you can copy the image but loop over the pixels writing a destination that is source_pixel/2 + dest_pixel/2;
i would like to take a live video feed from a video camera or 2 to do split screen stuff and render on top of them. How can i capture the input of the video?
i found some old code that uses pbuffers.. is this still the optimal way of doing it?
i guess their is a lot that depends on the connection interface, whether it is USB or fire wire or whatever?
thanks!
OpenCV has an abstraction layer that can handle web/video cameras.