Hi,
we developed similar apps in-house and we moved away from the sequence grabber
stuff to use libdc1394 to have complete control over 1394 devices and to
AVStuff for supporting other less technical cameras.
if you are centered upon IIDC cameras, libdc1394 is the way to go.
On 2013-12-02, at 05:58 , Motti Shneor <su...@bezeqint.net> wrote:
> Thanks Kyle. This seems indeed to be the modern Apple API I was looking for.
> Indeed bigger than an elephant :)
>
> However, I could not find any statement about AVFoundation's video-device
> support, and so I don't know if it will work reasonably with the types of
> IIDC/DCAM camera's I must work with.
>
> In addition, these devices usually have features and controls beyond the
> generic standard once supported by QuickTime's native IIDC Driver. I found no
> word from Apple about extending the generic IIDC support for more accurate
> control over specific devices.
>
> Last, I have found several open source projects (libdc1394, OpenCV,
> OpenFrameworks) that provide means to capture and control many IIDC cameras,
> but they are all so far in design from a Cocoa-App, I hesitate to invest in
> them.
>
> Do you have knowledge (google doesn't...) about these matters?
>
> On 25 בנוב 2013, at 20:17, Kyle Sluder <k...@ksluder.com> wrote:
>
>> You want AVCaptureSession.
>>
>> --Kyle Sluder
>>
>>> On Nov 25, 2013, at 9:53 AM, Motti Shneor <su...@bezeqint.net> wrote:
>>>
>>> Hello everyone.
>>>
>>> This seems a novice question, but I have scanned Apple Mac-Dev-Center site
>>> and I dived into all kinds of documentation, to no avail.
>>> It seems that some basic functionality that was once beautifully covered by
>>> the grand "QuickTime" API-set has split into so many parts of the system I
>>> can't figure out how to do it anymore.
>>> I'm re-writing an application I did 12 years ago, on MacOS 9, QuickTime
>>> Sequence-Grabber APIs and the first versions of Carbon.
>>>
>>> My task:
>>> ---------
>>> I need to continuously grab frames from an IIDC/DCam camera connected to
>>> the Mac via FireWire (iEEE1394), and display them on the application
>>> window, scaled, somewhat enhanced (contrast, edges), with a grid overlay
>>> drawn on them. Further, I need to allow a user to draw geometrical objects
>>> on the live image, and measure distances and curves clicking over the live
>>> video view.
>>> ---------
>>>
>>> I neither need to record video to disk nor to compress the incoming video.
>>> Just display it at the best quality and frame-rate I can. The camera is
>>> mounted on a Microscope, and the need for live-image is for the operator to
>>> be able to focus the microscope with on-screen feedback, or move the
>>> objective to search for some microscopic object.
>>>
>>> The original implementation did this without problems on 1999 Macs, using
>>> QuickTime SG (Sequence-Grabber) APIs for grabbing video, QuickDraw for
>>> drawing over the actual GWorld's. I also converted the color spaces by
>>> hand, and optimized here and there, until I was able to reach 15fps with a
>>> 2mega-pixel camera, on a PPC G3 iMac of that time.
>>>
>>> Now --- not only I can't find any API set that will allow me to grab video
>>> from camera, I find so many frameworks involved in Video that I can't find
>>> the connection points between them. Embarrassingly complicated and
>>> incomplete APIs.
>>>
>>> I know I'll need Quartz to draw over the image. I know CoreGraphics will be
>>> involved in the layering and CoreImage for image-enhancements. I don't know
>>> If I need CoreVideo, although it is about manipulating video as it is
>>> displayed. I don't know If I need QTKit or AVFoundation, or something else,
>>> and where does OpenGL get in the middle.
>>>
>>> There is NO SAMPLE PROGRAM now, in in the whole of Apple's developer site
>>> to simply grab frames from the iSight (internal camera of the Mac) and
>>> display them! The last thing I have (BrideOfMungGrab) does not compile
>>> anymore with MacOS 10.7 SDK. In the past, the same API was used for
>>> grabbing from iSight, DCAM/IIDCS cameras, and DV-Cam --- today I don't know.
>>>
>>> I absolutely need a pointer, or I'm missing something big as an elephant.
>>>
>
> Motti Shneor
> ----------------------------------------
> Ceterum censeo Microsoftinem delendam esse
>
>
>
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