Trying to capture QImage of video frame

[Anjani]

thank you for reply.I tried it but not working. I tried it after my clone frame syntax(in framegrabber.cpp file function present). Is that write position? I am new to Qt. I dont have much idea about it.

[SGaist]

Please be more precise. "Not working" doesn't say much. What are you getting ? A blank image ? A black image ? Funny colours ?

[Anjani]

@SGaist
ooh sorry for that. it still gives me .jpg image, where I want RGB data of image/frame.yet I am getting only the first frame all though I try to capture frame at any time.

[SGaist]

Aren't you getting a .png file ?

[Anjani]

yes i am getting .png but i want data in rgb format. because raw data format is only allowed on my frame buffer to display.

[SGaist]

You do realise that if you load your image again in a QImage, you'll get a RGB image ?

If you really want to save an RGB image then go for bitmap but beware, it's uncompressed.

[Anjani]

oh yes thank you. this will solve my problem partially. but what about new frame capture.? can you please help me out where I am lacking or what i am missing? why I am getting the same frame every time?If I'll get updated frame my task will be almost on final stage.please solve this.and again thank you.

[SGaist]

You always take the same image from the list, check that your counter increments properly and that you indeed update the list.

On a side note, you should pass const reference to QImage parameters. That will save useless copies.

[Anjani]

Thank you for reply and sorry for late response. Yes probably i am incrementing the counter properly. and sir I couldn't understand what you said about const reference to QImage parameter?

[SGaist]

Use: const QImage &image as parameter

[Anjani]

K let me try it