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jeffreyabe
Known Participant
July 20, 2013
Question

Slow Webcam Response

  • July 20, 2013
  • 2 replies
  • 3891 views

I've been struggling with poor performance from my Logitech 9000 Pro webcam. My program takes snapshots of the video and saves them to the users hard drive. I need high resolution images so I'm going for 1280x720 which is the limit of this webcam. But it's so slow. The refresh rate is poor and movement looks blurry. I have another brand new $100 webcam from Logitech and it's better, but has issues at higher resolutions like 1080p just like the 9000 Pro. I'm ready to dump Logitech and go with Microsoft webcams. Maybe I'll have better luck. Does anyone have any suggestions. The simplest of code gives me the poor results so I don't think it's the code, but the webcam or driver or both or logitech. Lower resolutions are faster, but I need 720p out of this camera and 1080p out of the newer camera. Here's my code:

import flash.media.Video;

var myWidth:Number = 1280;

var myHeight:Number = 720;

var my_video:Video = new Video(myWidth,myHeight);

var my_cam:Camera = Camera.getCamera();

my_cam.setMode(myWidth, myHeight, 30);

my_video.attachCamera(my_cam);

addChild(my_video);

This topic has been closed for replies.

2 replies

J
jeffreyabeAuthor
Known Participant
July 22, 2013

I've had some success dealing with this issue. First I turned on Level 2 Hardware Acceleration in the flash IDE which seems to have helped. Still can't use 1080p on an i3 laptop. I ran into the StageVideo object API. Looks great at first because the webcam might use direct hardware acceleration, but at the same time I also need to capture images from the video using BitMapData, etc and it looks like StageVideo cannot do that.

From Adobe StageVideo API:

The benefits to using a StageVideo object instead of the Video object are:

    Improved video display performance because of using hardware acceleration.

    Decreased CPU usage.

    Flexibility and creativity for development of content, such as video controls, that appears in front of the StageVideo object.

Is it safe to say that my users simply need a faster computer to handle 1080p video from a webcam? Like an i5 or i7? Is there something I'm missing? Does switching to Level 2 Hardware Acceleration provide a benefit to me like I'm thinking? Are the newer webcams talking to flash in a different way then they used to?

A
Anonymous
July 22, 2013

>.Still can't use 1080p on an i3 laptop

Well, of course not... It's an i3. I have hardware acceleration set to None in Publish Settings, and can get 1920x1080 video from a Logitech C920 without issue. However my dev machine is a dual core i7... I'd never expect to be able to do that on an i3 though, and likely not even on an i5 - though 720 should be doable on it.

J
jeffreyabeAuthor
Known Participant
July 22, 2013

My dev machine is an i7 and it works well on that I agree. But the C920 works on my i3 laptop using the Logitech Software at 1080p perfectly, but not in flash. My question is why? It has to be that their software communicates with the camera better or something. Right?

A
Anonymous
July 22, 2013

It sounds to me like you have not installed the Logitech drivers. The cam will just work if you plug it in, but if you don't install the drivers you will get very poor perfomance. I use the 1920x1080 Logitech C920 for any webcam projects I do, and have had this same issue.

In fact, I just did a quick test with your code, and my C920 does 30fps no problem - even at 1920x1080 it was fine.

J
jeffreyabeAuthor
Known Participant
July 22, 2013

Just saw your response. It's the Logitech C920 I'm having issues with as well, but the camera is incredible otherwise. All three logitech cameras I'm using use the exact same software and drivers so I've just been switching out trying different cameras. It recognizes them just fine.

However, when I use logitechs software to capture video, the camera is perfect. No delays whatsoever. So why does flash do so poorly with the same video in the same 1080p mode?

A
Anonymous
July 22, 2013

>>However, when I use logitechs software to capture video, the camera is perfect. No delays whatsoever. So why does flash do so poorly with the same video in the same 1080p mode?

That is odd. 1080 is working great for me in Flash, it's very smooth. I never even installed the Logitech software though, just the drivers, so I can't test any difference. What version of Windows - I'm running 64bit Windows 8.

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