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<div class="twikiMiddleContainer"><div class="twikiMain"><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/Compositing">Compositing</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/Compositing?rev=r1.5">r1.5</a> - 29&nbsp;Dec&nbsp;2004 - <a class="twikiLink" href="../../view/Main/NathanKidd">NathanKidd</a>)</div>
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<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
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<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> <a class="twikiLink" href="../../view/Cinelerra/AboutCinelerra">AboutCinelerra</a> </td></tr>
</table>
<h3><a name="Compositing_Work_in_progress"> </a><a name="_Compositing_Work_in_progress_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> <img src="../../../pub/TWiki/TWikiDocGraphics/pencil.gif" border="0" alt="REFACTOR" width="16" height="16" /> (<em>Work in progress..</em>)  </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra.
</td></tr>
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<p />
The translation effect is dropped onto the video track. The input dimensions of the translation effect are set to the original size and the output dimensions are set to the reduced size. To put the reduced video in the center section that the projector shows would require offsetting out x and out y by a complicated calculation. Instead, we leave out x and out y at 0 and use the projector's tool window.
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
Merely by selecting left_justify.png left justify and top_justify.png top justify, the projector displays the reduced image from the top left corner of the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">CompositorTemporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/CompositorTemporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> in the center of the output. 
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
Merely by selecting <img src="../../../pub/Cinelerra/CinelerraImages/button_justify_left.png" alt="button_justify_left.png" /> left justify and <img src="../../../pub/Cinelerra/CinelerraImages/button_justify_top.png" alt="button_justify_top.png" /> top justify, the projector displays the reduced image from the top left corner of the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">CompositorTemporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/CompositorTemporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> in the center of the output. 
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<td class="twikiDiffUnchangedText">
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 fromSecretsOfCinelerra
<hr />
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/Compositing">Compositing</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/Compositing?rev=r1.4">r1.4</a> - 22&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<td class="twikiDiffUnchangedText">
<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> <a class="twikiLink" href="../../view/Cinelerra/AboutCinelerra">AboutCinelerra</a> </td></tr>
</table>
<h3><a name="Compositing_Work_in_progress"> </a><a name="_Compositing_Work_in_progress_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> <img src="../../../pub/TWiki/TWikiDocGraphics/pencil.gif" border="0" alt="REFACTOR" width="16" height="16" /> (<em>Work in progress..</em>)  </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra.
</td></tr>
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<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<ul>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> determines where in the source video the temporary is copied from. 
</li>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> determines where in the output the temporary is copied to. 
</li>
</ul>
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
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The <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">CompositingTemporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Trash/CompositingTemporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> is a frame of video in Cinelerra's memory where all graphics processing is done.<br>
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<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
The <a class="twikiLink" href="../../view/Cinelerra/CompositingTemporary">CompositingTemporary</a> is a frame of video in Cinelerra's memory where all graphics processing is done.<br>
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<td class="twikiDiffUnchangedText">
<ul>
<li> Each track has a different temporary which is defined by the track size. 
</li>
<li> By resizing the tracks you can create splitscreens, pans, and zooms. 
</li>
</ul>
</td></tr>
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<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
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<p />
The translation effect is dropped onto the video track. The input dimensions of the translation effect are set to the original size and the output dimensions are set to the reduced size. To put the reduced video in the center section that the projector shows would require offsetting out x and out y by a complicated calculation. Instead, we leave out x and out y at 0 and use the projector's tool window.
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
Merely by selecting left_justify.png left justify and top_justify.png top justify, the projector displays the reduced image from the top left corner of the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">temporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Temporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> in the center of the output. 
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
Merely by selecting left_justify.png left justify and top_justify.png top justify, the projector displays the reduced image from the top left corner of the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">CompositorTemporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/CompositorTemporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> in the center of the output. 
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 fromSecretsOfCinelerra
<hr />
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/Compositing">Compositing</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/Compositing?rev=r1.3">r1.3</a> - 22&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> <a class="twikiLink" href="../../view/Cinelerra/AboutCinelerra">AboutCinelerra</a> </td></tr>
</table>
<h3><a name="Compositing_Work_in_progress"> </a><a name="_Compositing_Work_in_progress_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> <img src="../../../pub/TWiki/TWikiDocGraphics/pencil.gif" border="0" alt="REFACTOR" width="16" height="16" /> (<em>Work in progress..</em>)  </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra.
</td></tr>
<tr bgcolor="#eeeeee" class="twikiDiffLineNumberHeader"><th align="left" colspan="9">Line: 15 to 15</th></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<ul>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> determines where in the source video the temporary is copied from. 
</li>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> determines where in the output the temporary is copied to. 
</li>
</ul>
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
The <a class="twikiLink" href="../../view/Cinelerra/CompositingTemporary">CompositingTemporary</a> is a frame of video in Cinelerra's memory where all graphics processing is done.<br>
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
The <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">CompositingTemporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Trash/CompositingTemporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> is a frame of video in Cinelerra's memory where all graphics processing is done.<br>
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<ul>
<li> Each track has a different temporary which is defined by the track size. 
</li>
<li> By resizing the tracks you can create splitscreens, pans, and zooms. 
</li>
</ul>
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/Compositing">Compositing</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/Compositing?rev=r1.2">r1.2</a> - 18&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> <a class="twikiLink" href="../../view/Cinelerra/AboutCinelerra">AboutCinelerra</a> </td></tr>
</table>
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
<h3><a name="Compositing"> </a><a name="_Compositing_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra. Cinelerra detects when it's in a compositing operation and plays back through the compositing engine only then. Otherwise, it uses the fastest decoder available in the hardware.
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<h3><a name="Compositing_Work_in_progress"> </a><a name="_Compositing_Work_in_progress_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> <img src="../../../pub/TWiki/TWikiDocGraphics/pencil.gif" border="0" alt="REFACTOR" width="16" height="16" /> (<em>Work in progress..</em>)  </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra.
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
Compositing operations are done on the timeline and in the Compositor window. Shortcuts exist in the Resource window for changing project attributes. Once some video files are on the timeline, the compositor window is a good place to try compositing. 
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<img src="../../../pub/TWiki/TWikiDocGraphics/help.gif" border="0" alt="HELP" width="16" height="16" /> Cinelerra detects when it's in a compositing operation and plays back through the compositing engine only then. Otherwise, it uses the fastest decoder available in the hardware.
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
In the compositor window, the most important functions are the camera.png <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> button and the projector.png <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> button. These control operation of the <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> and <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a>. Inside Cinelerra's compositing pipeline, the <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> determines where in the source video the temporary is copied from. The <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> determines where in the output the temporary is copied to. The <a class="twikiLink" href="../../view/Cinelerra/CompositingTemporary">CompositingTemporary</a> is a frame of video in Cinelerra's memory where all graphics processing is done. Each track has a different temporary which is defined by the track size. By resizing the tracks you can create splitscreens, pans, and zooms. 
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
Compositing operations are done on the timeline and in the Compositor window. 
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<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
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When editing the camera and projector in the compositing window, the first track with record enabled is the track affected. Even if the track is completely transparent, it's still the affected track. If multiple video tracks exist, the easiest way to select one track for editing is to shift-click on the record icon of the track. This solos the track.
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
Shortcuts exist in the <a class="twikiLink" href="../../view/Cinelerra/ResourcesManager">ResourcesManager</a> window for changing <a class="twikiLink" href="../../view/Cinelerra/AssetManager">project attributes</a>. Once some video files are on the timeline, the compositor window is a good place to try compositing. 
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
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<td class="twikiDiffDeletedText">
When the projector button is enabled in the compositor window, you're in projector editing mode. A guide box appears in the video window. Dragging anywhere in the video window causes the guide box to move, hopefully along with the video. shift-dragging anywhere in the video window causes the guide box to shrink and grow along with the video. Once you've positioned the video with the projector, you're ready to master the camera.
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<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
In the compositor window, the most important functions are the <img src="../../../pub/Cinelerra/CinelerraImages/button_compositor_camera.png" alt="button_compositor_camera.png" /> <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> button and the <img src="../../../pub/Cinelerra/CinelerraImages/button_compositor_projector.png" alt="button_compositor_projector.png" /> <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> button. These control operation of the <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> and <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a>.
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<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
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<td class="twikiDiffDeletedText">
Select the camera.png camera button to enable camera editing mode. In this mode, the guide box shows where the camera position is in relation to past and future camera positions but not where it is in relation to the source video. Dragging the camera box in the compositor window doesn't move the box but instead moves the location of the video inside the box.
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<td class="twikiDiffAddedText">
Inside Cinelerra's compositing pipeline, 
<ul>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> determines where in the source video the temporary is copied from. 
</li>
<li> The <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> determines where in the output the temporary is copied to. 
</li>
</ul>
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
For example, when you drag the camera left, the video moves right. When you drag the camera up, the video moves down. When you shift-drag the camera, the effect is the same as if you zoomed in or out of the source. The intention of the camera is to produce still photo panning, while the intention of the projector is to composite several sources in the same scene.
</td></tr>
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The <a class="twikiLink" href="../../view/Cinelerra/CompositingTemporary">CompositingTemporary</a> is a frame of video in Cinelerra's memory where all graphics processing is done.<br>
<ul>
<li> Each track has a different temporary which is defined by the track size. 
</li>
<li> By resizing the tracks you can create splitscreens, pans, and zooms. 
</li>
</ul>
<p />
When editing the camera and projector in the compositing window, the first track with record enabled is the track affected. Even if the track is completely transparent, it's still the affected track. 
<p />
If multiple video tracks exist, the easiest way to select one track for editing is to shift-click on the record icon of the track. This solos the track.
<p />
When the projector button is enabled in the compositor window, you're in projector editing mode.<br>
A guide box appears in the video window. <br>
<ul>
<li> Dragging anywhere in the video window causes the guide box to move, hopefully along with the video.
</li>
<li> Shift-dragging anywhere in the video window causes the guide box to shrink and grow along with the video.
</li>
</ul>
<p />
Once you've positioned the video with the projector, you're ready to master the camera.
<p />
<ul>
<li> Select the camera.png camera button to enable camera editing mode.
</li>
</ul>
<p />
<ul>
<li>
<ul>
<li> In this mode, the guide box shows where the camera position is in relation to past and future camera positions but not where it is in relation to the source video.
</li>
<li> Dragging the camera box in the compositor window doesn't move the box but instead moves the location of the video inside the box.
</li>
</ul>
</li>
</ul>
<p />
<p />
For example: 
<ul>
<li> When you drag the camera left, the video moves right. 
</li>
<li> When you drag the camera up, the video moves down. 
</li>
<li> When you shift-drag the camera, the effect is the same as if you zoomed in or out of the source.
</li>
</ul>
<p />
<img src="../../../pub/TWiki/TWikiDocGraphics/starred.gif" border="0" alt="PICK" width="16" height="16" /> The intention of the camera is to produce still photo panning, while the intention of the projector is to composite several sources in the same scene.
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<p />
In the compositing window, there is a popup menu of options for the camera and projector. Right click over the video portion of the compositing window to bring up the menu.
<p />
    * Reset Camera causes the camera to return to the center position.
* Reset Projector causes the projector to return to the center.
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The camera and projector have shortcut operations neither in the popup menu or represented in video overlays. These are accessed in the Tool window. Most operations in the Compositor window have a tool window which is enabled by activating the toolwindow.png question mark.
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<img src="../../../pub/TWiki/TWikiDocGraphics/tip.gif" border="0" alt="TIP" width="16" height="16" /> The camera and projector have shortcut operations neither in the popup menu or represented in video overlays. These are accessed in the Tool window. Most operations in the Compositor window have a tool window which is enabled by activating the toolwindow.png question mark.
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<p />
In the case of the camera and projector, the tool window shows x, y, and z coordinates. By either tumbling or entering text directly, the camera and projector can be precisely positioned. 9 justification types are also defined for easy access. A popular justification operation is upper left projection after image reduction. This is used when reducing the size of video with aspect ratio adjustment.
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</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/Compositing">Compositing</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/Compositing?rev=r1.1">r1.1</a> - 21&nbsp;Dec&nbsp;2003 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<tr><td bgcolor="#D0FFD0" class="twikiDiffAddedHeader" colspan ="9"><b> Added:   </b>
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<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> <a class="twikiLink" href="../../view/Cinelerra/AboutCinelerra">AboutCinelerra</a> </td></tr>
</table>
<h3><a name="Compositing"> </a><a name="_Compositing_"> </a> <a class="twikiLink" href="../../view/Cinelerra/Compositing">Compositing</a> </h3>
A large amount of Cinelerra's binary size is directed towards compositing. When you remove the letterboxing from a widescreen show, you're compositing. Changing the resolution of a show, making a split screen, and fading in and out among other things are all compositing operations in Cinelerra. Cinelerra detects when it's in a compositing operation and plays back through the compositing engine only then. Otherwise, it uses the fastest decoder available in the hardware.
<p />
Compositing operations are done on the timeline and in the Compositor window. Shortcuts exist in the Resource window for changing project attributes. Once some video files are on the timeline, the compositor window is a good place to try compositing. 
<p />
In the compositor window, the most important functions are the camera.png <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> button and the projector.png <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> button. These control operation of the <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> and <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a>. Inside Cinelerra's compositing pipeline, the <a class="twikiLink" href="../../view/Cinelerra/CompositingCamera">CompositingCamera</a> determines where in the source video the temporary is copied from. The <a class="twikiLink" href="../../view/Cinelerra/CompositingProjector">CompositingProjector</a> determines where in the output the temporary is copied to. The <a class="twikiLink" href="../../view/Cinelerra/CompositingTemporary">CompositingTemporary</a> is a frame of video in Cinelerra's memory where all graphics processing is done. Each track has a different temporary which is defined by the track size. By resizing the tracks you can create splitscreens, pans, and zooms. 
<p />
When editing the camera and projector in the compositing window, the first track with record enabled is the track affected. Even if the track is completely transparent, it's still the affected track. If multiple video tracks exist, the easiest way to select one track for editing is to shift-click on the record icon of the track. This solos the track.
<p />
When the projector button is enabled in the compositor window, you're in projector editing mode. A guide box appears in the video window. Dragging anywhere in the video window causes the guide box to move, hopefully along with the video. shift-dragging anywhere in the video window causes the guide box to shrink and grow along with the video. Once you've positioned the video with the projector, you're ready to master the camera.
<p />
Select the camera.png camera button to enable camera editing mode. In this mode, the guide box shows where the camera position is in relation to past and future camera positions but not where it is in relation to the source video. Dragging the camera box in the compositor window doesn't move the box but instead moves the location of the video inside the box.
<p />
For example, when you drag the camera left, the video moves right. When you drag the camera up, the video moves down. When you shift-drag the camera, the effect is the same as if you zoomed in or out of the source. The intention of the camera is to produce still photo panning, while the intention of the projector is to composite several sources in the same scene.
<p />
In the compositing window, there is a popup menu of options for the camera and projector. Right click over the video portion of the compositing window to bring up the menu.
<p />
    * Reset Camera causes the camera to return to the center position.
* Reset Projector causes the projector to return to the center.
<p />
The camera and projector have shortcut operations neither in the popup menu or represented in video overlays. These are accessed in the Tool window. Most operations in the Compositor window have a tool window which is enabled by activating the toolwindow.png question mark.
<p />
In the case of the camera and projector, the tool window shows x, y, and z coordinates. By either tumbling or entering text directly, the camera and projector can be precisely positioned. 9 justification types are also defined for easy access. A popular justification operation is upper left projection after image reduction. This is used when reducing the size of video with aspect ratio adjustment.
<p />
The translation effect allows simultaneous aspect ratio conversion and reduction but is easier to use if the reduced video is put in the upper left of the temporary instead of in the center. The track size is set to the original size of the video and the camera is centered. The output size is set to the reduced size of the video. Without any effects, this produces just the cropped center portion of the video in the output.
<p />
The translation effect is dropped onto the video track. The input dimensions of the translation effect are set to the original size and the output dimensions are set to the reduced size. To put the reduced video in the center section that the projector shows would require offsetting out x and out y by a complicated calculation. Instead, we leave out x and out y at 0 and use the projector's tool window.
<p />
Merely by selecting left_justify.png left justify and top_justify.png top justify, the projector displays the reduced image from the top left corner of the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">temporary</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Temporary?topicparent=Cinelerra.Compositing"><sup>?</sup></a></span> in the center of the output. 
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 fromSecretsOfCinelerra
<hr />
</td></tr>

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</div><div class="twikiTopicInfo"><span class="twikiRevInfo twikiGrayText">Revision r1.1 - 21 Dec 2003 - 20:06 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a><br />
Revision r1.5 - 29 Dec 2004 - 03:39 - <a class="twikiLink" href="../../view/Main/NathanKidd">NathanKidd</a></span></div>
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