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<concept id="GUID-AB9A3EA2-2B99-4502-A161-8EE5BF477D41" xml:lang="en"><title>Capturing

a Video Clip</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>To record video data to a file, descriptor, or an URL, use the video

recorder utility of the Multimedia Framework (MMF) to develop your application.

To make use of the onboard camera to capture a video clip, the application

needs to repeat the steps described in the illustration below.</p>

<fig id="GUID-FEDF24E9-1171-4814-B3C9-21B4E37003BB"><title>The steps required to capture a video clip</title><image href="GUID-141D8786-9987-4E5E-9395-484C87B323FB_d0e297093_href.png"/></fig>

<p>Important implementation considerations include:</p>

<ul>

<li><p>Make sure you include the <codeph>VideoRecorder.h</codeph> and <codeph>mmfcontrollerpluginresolver.h</codeph> header

files in the appropriate class files.</p></li>

<li><p>Make sure you have correct <xref href="GUID-6971B0A2-F79B-4E05-8AF3-BB1FC1932A22.dita">capabilities</xref> information

set for your application. You need at least the <codeph>UserEnvironment</codeph> capability.

If you want to set the recording priority for the video and audio device,

you need the <codeph>MultimediaDD</codeph> capability.</p></li>

<li><p>Make sure <codeph>mediaclientvideo.lib</codeph> and <codeph>mmfcontrollerframework.lib</codeph> are

accessible to your linker when compiling your application by including it

in your <codeph>mmp</codeph> file or by editing the project properties in

your IDE, depending on your build environment.</p></li>

<li><p>To open a file for recording the <xref href="GUID-8A183C79-0EA4-3A4A-B95F-E2F1BF74238D.dita"><apiname>CVideoRecorderUtility</apiname></xref> class

requires the MMF Controller Framework API to specify controller and format

UIDs.</p></li>

<li><p>If you need to use the display of the device as a viewfinder

for your video application, request viewfinder frames using the <xref href="GUID-021C509B-C821-3401-B2F4-DE7F52BB16D4.dita"><apiname>CCamera</apiname></xref> class,

and draw them yourself. For more information, see step 3 in <xref href="GUID-A1D2C673-3B91-403A-800B-5E1504FB19EE.dita#GUID-A1D2C673-3B91-403A-800B-5E1504FB19EE/GUID-A7ED7A90-1432-4905-A0A5-0CC725997127">To capture still images on a mobile device </xref>.</p></li>

<li><p>The settings you can use in your application depend on what

the camera hardware on the device supports.</p></li>

</ul>

<section id="GUID-0C91A376-92FB-4C5F-8DCF-68A24D01CB9C"><title>To capture a

video clip</title>

<p>Use the methods of the <codeph>CVideoRecorderUtility</codeph> class

to construct your application.</p>

<ol>

<li id="GUID-77A80BE7-A452-42C4-A815-712402597071"><p>Initialize

the video recorder.</p>

<ul>

<li><p>Create a video recorder object using the <codeph>CVideoRecorderUtility::NewL</codeph> method.</p>

</li>

<li><p>Resolve the supported video format and retrieve a list of

controllers using the <codeph>CMMFControllerPluginSelectionParameters</codeph> and <codeph>CMMFFormatSelectionParameters</codeph> classes,

and the respective type definitions <codeph>RMMFControllerImplInfoArray</codeph> and <codeph>RMMFFormatImplInfoArray</codeph>. </p>

</li>

<li><p>Open a file, descriptor or an URL to store the video clip

in using the respective <codeph>CVideoRecorderUtility::OpenFileL</codeph>, <codeph>CVideoRecorderUtility::OpenDesL</codeph>,

or <codeph>CVideoRecorderUtility::OpenUrlL</codeph> method.</p></li>

<li><p>Set the maximum video clip size using the <codeph>CVideoRecorderUtility::SetMaxClipSizeL()</codeph> method.</p>

</li>

<li><p>Prepare the record controller using the <codeph>CVideoRecorderUtility::Prepare()</codeph> method. <codeph>MVideoRecorderUtilityObserver::MvruoPrepareComplete</codeph> is called upon completion.</p></li>

</ul>

</li>

<li id="GUID-8A46469A-E0BE-4789-ADEE-C900FF7CB331"><p>Configure

the audio and video settings.</p><p>You can check and set, for example,

the recording priority, audio track, video frame size and frame rate, audio

and video codecs and bit rates, and recording gain of the video clip. For

more information on the options, see the <codeph>CVideoRecorderUtility</codeph> class.</p>

</li>

<li id="GUID-CB57B0CC-14AD-464F-82FF-9D80CD369CD5"><p>Capture the

video clip.</p>

<ul>

<li><p>Start recording a video using the <codeph>CVideoRecorderUtility::Record()</codeph> method.</p>

</li>

<li><p>Pause recording using the <codeph>CVideoRecorderUtility::PauseL()</codeph> method.</p>

</li>

<li><p>Stop recording using the <codeph>CVideoRecorderUtility::Stop()</codeph> method.</p>

</li>

</ul>

</li>

<li id="GUID-6CB8476D-CC81-4776-B42F-F6AF3EDEBE76"><p>To exit the

application or to switch it to the background, close audio and video controllers

using the <codeph>CVideoRecorderUtility::Close()</codeph> method.</p></li>

</ol>

</section>

<section id="GUID-AA5B55BE-12E2-4CDF-9FA6-717669E07095"><title>Additional information

on capturing a video</title>

<p>For a reference example, see the <xref href="GUID-55BF8452-F9FF-5CF3-9D74-3BC7F5447551.dita">Camera

Example: Capturing and controlling the images using Camera</xref>.</p>

<p>For more information on <codeph>CVideoRecorderUtility</codeph>, see:</p>

<ul>

<li><p><xref href="GUID-2DC80BA9-7AA2-5CD3-9105-1DE28CE196C1.dita">Video

Client Overview</xref></p></li>

<li><p><xref href="http://developer.symbian.org/wiki/index.php/File:Quick_Recipes_Symbian_multimedia_recipes.pdf" scope="external">Multimedia

recipes</xref> at the Symbian Foundation</p></li>

</ul>

<p>For information on using encoded H264 video frames, see <xref href="GUID-D038D77F-A6B8-5A18-8978-4981AE8D0F35.dita">Using

the Encoded H264 Video Frames to Capture Video</xref>.</p>

</section>

</conbody></concept>