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<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; padding-top: 0pt; "><span style="font-family: 'Helvetica-Bold', 'Helvetica', 'Arial', 'sans-serif'; font-size: 18px; font-weight: bold; line-height: 22px; ">How It Works</span><span style="font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 18px; line-height: 22px; "></span></div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 11px; line-height: 13px; text-decoration: none;"> </div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">All QTKit capture applications make use of three basic types of objects: capture inputs, capture</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">outputs, and a capture session. Capture inputs, which are subclasses of QTCaptureInput, provide</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">the necessary interfaces to different sources of captured media.</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px; text-decoration: none;"> </div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">A QTCaptureDeviceInput object, which is a subclass of QTCaptureInput, provides an interface to</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">capturing from various audio/video hardware, such as cameras and microphones. Capture outputs,</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">which are subclasses of QTCaptureOutput, provide the necessary interfaces to various destinations</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">for media, such as QuickTime movie files, or video and audio previews.</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">A capture session, which is a QTCaptureSession object, manages how media that is captured from</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">connected input sources is distributed to connected output destinations. Each input and output has</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">one or more connection, which represents a media stream of a certain QuickTime media type, such</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">as video or audio media. A QTCaptureSession will attempt to connect all input connections to each</div> |
<div class="paragraph Free_Form" style="line-height: 20px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 17px;">of its outputs.</div> |
<div class="paragraph Free_Form" style="line-height: 20px; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 17px;">The illustration below shows how a QTCaptureSession works. This is accomplished by connecting inputs to</div> |
<div class="paragraph Free_Form" style="line-height: 17px; margin-bottom: 0px; margin-top: 0px; padding-bottom: 0pt; font-family: 'Helvetica', 'Arial', 'sans-serif'; font-size: 12px; line-height: 14px;">outputs in order to record and preview video from a camera.</div> |
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