Hi Alex! I'm not sure I understand the clarification; I'm looking to grab 60 frames per second, to track a fast moving object. (which I think of as 60hz). Does that make sense?
Jesse On Dec 1, 2011, at 12:26 AM, Alex Zavatone <[email protected]> wrote: > Hz od FPS? > > On Nov 30, 2011, at 2:27 PM, jesse wrote: > >> (Apologies if this is the wrong list, searching around it seems like this is >> the list where AVFoundation is most discussed - please point me to the right >> list if I'm in the wrong one!) >> >> Hello List, >> >> I'm hoping to grab from a webcam at greater than 30hz. I purchased a >> Philips SPZ6500/27 for this purpose, which claims to support up to 90hz >> grabbing. It also claims to be a UVC camera. My initial thought is to use >> AVFoundation Capture, because it looks like the way to go for new >> development, and looks like it supports directly access/setting hardware >> specific parameters like frame rate. I've tried AVRecorder to make sure >> that the camera works with AVFoundation, and everything works well running >> the example code and viewing the camera output. However, when I added code >> to enumerate the formats ("AVCaptureDevice::formats"), nothing over 30hz >> shows up in the list. >> >> I'm hoping the collective wisdom of the list can help with some basic >> questions, before I go too far down a wrong path: >> -Is it possible to grab at greater than 30hz with AVFoundation, or is that a >> maximum frame rate that's part of the spec? >> -If I feel a format exists that isn't listed in the >> "AVCaptureDevice::formats", is there any chance of success manually defining >> that format and trying to get the AVCaptureDevice to accept it (or >> similarly, perhaps it is possible to manually inform AVFoundation of the >> camera capabilities earlier in the process)? >> >> -Other options: >> - If this particular camera isn't well behaved, are there any >> known-compatible cameras that can capture faster than 30hz? >> - Is there another API to look at in this case to get the camera data at >> higher frame rates? >> >> Thanks for any tips!! >> Jesse >> >> _______________________________________________ >> >> Cocoa-dev mailing list ([email protected]) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/zav%40mac.com >> >> This email sent to [email protected] > _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
