Bad interaction with SDL RenderPresent? about webcam HOT 6 CLOSED

Hi, @cmatsuoka.
I think the problem is in the way Go interracts with C libraries. Look at this article, for example.

There is a pull request I'm currently working on (#4) that should fix your problem. Unfortunately now it's under development because of issues that popped up during testing, but I've checked your example and it runs smoothly on my machine.

Have a look at goimpl branch of library and see if it helps you.

from webcam.

Hi @blackjack, I tried the goimpl branch and it indeed fixes the screen update rates and makes the example above run smoothly. It doesn't work completely because if I add the code to actually show the captured frame it seems that ReadFrame() is always returning the same buffer. The index variable is being correctly updated from 0 to 31, but the buffer contents change only after a full index cycle. Maybe a queuing problem? Perhaps this is already in your radar, otherwise I can investigate further.

from webcam.

Confirmed: buffer sequence numbers are correct, pointers to frame data are different, but image data is the same for all buffers.

from webcam.

I've fixed buffer reading in 008c830, can you test it now?

from webcam.

Problem fixed, frames are being correctly updated. Thanks!

from webcam.

Good to hear that

from webcam.