I'm developing an application that loads frames from an ethernet camera and displays these frames in an element within a Qt QWebView.
So I would like to ask, which is the best or the most efficient way to display images in sequence from the camera, so that it would display as a live video for the user.
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I am porting an video streamer application to QT (from HTML), I just had the webcam working using QT, and now I want to know How can I get the RGB Video buffer from a QT Camera? All the samples I can see is capturing image to a file.
I am using QT Widgets and not QML since its a desktop application.
What I am trying to do is to get the buffer image of the camera, compress it and send to network.
And I want to trigger this manualy since I want to call the capture of next frame when all the compression and sending is done to prevent timing issue.
Recently I have tried to do some graphics on the top of VLC video using vlc-qt (which provides a video widget). The approach was trying to draw something on the widget. But it failed duo to the fact that vlc-qt's widget uses an internal widget to render video. (See more details here)
Now I'm trying to do something different. I want to try drawing text (or some rectangles) on the VLC media itself (not the widget). I suppose it's the way how VLC media player renders subtitles (isn't it?)
So the question is this: Having a vlc-qt interface, how can I access underlying vlc object and draw something on it [using libVLC API]?
I'm afraid the only way to do it with libvlc is to use libvlc_video_set_callbacks + libvlc_video_set_format_callbacks. It will decode media stream's frames to memory, which you could use as you wish.
I was planning to use Qt to record video/audio and to show the camera view while it is recording. However, there is a bug report with recording videos on Windows, as reported in this page, and I confirmed that the issue is legitimate. There wasn't any problem with recording video and audio on Macintosh and Linux-Ubuntu.
Due to this issue with Qt, I'm looking for another C++ library that does video and audio recording and can display the camera view. It will be great if it is easy to use and integrate into my project.
I need to design a GUI in such a way that a video should be played in one thread (as a panel in the frame or window) and Camera video should be captured and displayed in another thread(as a panel in the frame or window). Please find the below link for the
I need a GUI as http://www.youtube.com/watch?v=mA883X4uaHk (pl watch from .35s).
I found that this can be done in QT. But am bit new to QT. Can Some one give me some tips on how to do this in QT.? Anything with the basic code to handle frames and panels would be really helpful.
I'm using VLC library to create a simple media player, the program will display instructions above the video. These instructions are varying in position, size and color. I need to process the video frame before it's displayed to add my drawings. How can this be done? How can I have the libvlc show this large text when changing the volume up or down?