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</div><div class="twikiRevInfo"><span class="twikiGrayText"><span class="twikiToolbarElem">Cinelerra.MyCarBlewUp</span><span class="twikiToolbarElem">r1.6 - 19 Aug 2005 - 15:02 - <a class="twikiLink" href="../Main/PhilONeill">PhilONeill</a></span><span class="twikiToolbarElem"><a href="#TopicEnd">topic&nbsp;end</a></span></span></div></div>
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<h3><a name="My_car_blew_up"> </a><a name="My_car_blew_up_"> </a> My car blew up ! </h3>
<p />
No, not really.. but here is a tutorial on how to use <a href="http://www.gimp.org/" target="_top">Gimp</a> and Cinelerra to make an sfx video that look's like it did. 
<p />
<p />
<h4><a name="Ingredients"> </a><a name="Ingredients_"> </a> Ingredients:  </h4>
<p />
<ul>
<li> <img src="../../../pub/Cinelerra/MyCarBlewUp/house_before.png" />
   <br> 1 picture of a house with a car parked in front.
</li>
<li> 1 picture of a burned car (you can get it at google images..   just search for: "car explosion")
</li>
</ul>
<p />
<p />
<ul>
<li> <img src="../../../pub/Cinelerra/MyCarBlewUp/explosion.png" />
 <br> 1 mov sfx clip of a fire explosion on a black background. (you can google it too, or DIY at your own risk!)
</li>
</ul>
<p />
<ul>
<li> 1 mp3 sfx of an explosion sound (from google too!)  <a href="../../../pub/Cinelerra/MyCarBlewUp/explode.mp3" target="_top">explode.mp3</a>  
</li>
</ul>
<p />
<p />
<ul>
<li> <img src="../../../pub/TWiki/TWikiDocGraphics/tip.gif" border="0" alt="TIP" width="16" height="16" /> You can use .png or .jpg formats for your pictures.
</li>
</ul>
<p />
Using <a href="http://www.gimp.org/" target="_top">gimp</a>(or the graphics editor of your choice) 
<ul>
<li> Resize the burned car picture, till it is proportional to the car parked at 
     the house from picture 1.
</li>
<li> Select the burned car from the resized picture and cut.
</li>
<li> Move to picture 1 (house with car) and paste it over the original car.
</li>
<li> Use the stamp tool to pick up some "burn" from the car and spread it over the
     walls of the house to create a nice "after the explosion" look.
</li>
</ul>
<p />
<ul>
<li> <img src="../../../pub/Cinelerra/MyCarBlewUp/house_after.png" /> <br> <strong><em>"after the explosion" image.</em></strong> 
</li>
</ul>
<p />
<ul>
<li> Save the composited image as "house_after_explosion.
</li>
</ul>
<p />
<h4><a name="Preparing_Cinelerra"> </a> Preparing Cinelerra </h4>
<ul>
<li> Create a <a class="twikiLink" href="NewProject">NewProject</a>
</li>
<li> Add 2 video <a class="twikiLink" href="MediaTrack">tracks </a>
</li>
<li> Add 2 audio <a class="twikiLink" href="MediaTrack">tracks </a>
</li>
<li> Using "load assets only" <a class="twikiLink" href="LoadingFile">load</a> the above media assets (2 pics + 1 mp3 + 1 mov)
</li>
</ul>
<p />
   <img src="../../../pub/TWiki/TWikiDocGraphics/tip.gif" border="0" alt="TIP" width="16" height="16" /> for the next steps, "single-activate" the track in wich you will be working
       by cliking on the () button to the right of the <a class="twikiLink" href="PatchBay">PatchBay</a>, all non used tracks should be disabled.
<p />
<h4><a name="Creating_the_before_explosion_cl"> </a> Creating the before-explosion clip from a still picture. </h4>
<ul>
<li> Single activate video track 1
</li>
<li> <a class="twikiLink" href="AssetManager">Drag &amp; drop</a> the "house_before_explosion" image from the <a class="twikiLink" href="AssetManager">AssetManager</a> to the 1st video track on the <a class="twikiLink" href="MainProgram">MainProgram</a>. 
 This creates a single video frame at the begining of the track.
</li>
<li> Using the <a class="twikiLink" href="ZoomPanelBar">ZoomPanelBar</a>, resize the <a class="twikiLink" href="TimeLine">TimeLine</a> sample zoom so we can see the single frame.
</li>
<li> Position the mouse on the inner right edge of the image frame, then drag the 
     to the right. (Cinelerra automatically creates new frames to fill the space)    
 You might have to repeat the above steps (Resize , drag) a couple of times until you have 10 or 20 seconds worth of clip. 
</li>
</ul>
<p />
<h4><a name="Creating_the_after_explosion_cli"> </a> Creating the after-explosion clip from a still picture. </h4>
<ul>
<li> <a class="twikiLink" href="AssetManager">Drag &amp; drop</a> the "house_after_explosion" image from the <a class="twikiLink" href="AssetManager">AssetManager</a> to the 1st video track on the program manager, and drop it right after the clip we just made. 
</li>
<li> Repeat the above steps to create 20 seconds of clip out of this new image. 
</li>
</ul>
<p />
<h4><a name="Merging_the_before_and_after_cli"> </a> Merging the before and after clips.  </h4>
<ul>
<li> From the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">ResourceManager</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/ResourceManager?topicparent=Cinelerra.MyCarBlewUp"><sup>?</sup></a></span> select <a class="twikiLink" href="VideoTransition">VideoTransition</a>
</li>
<li> Click on <a class="twikiLink" href="VideoDissolve">disolve</a> <img src="../../../pub/Cinelerra/CinelerraImages/video_disolve_icon.png" alt="video_disolve_icon.png" /> and drag it to the program manager, drop it right at the point where clip 1 and clip 2 join. 
</li>
</ul>
<p />
<img src="../../../pub/TWiki/TWikiDocGraphics/tip.gif" border="0" alt="TIP" width="16" height="16" /> You can preview what we done so far by pressing rewind &amp; play on the Compositor window.
<p />
<h4><a name="Adding_the_explosion"> </a><a name="Adding_the_explosion_"> </a> Adding the explosion. </h4>
<ul>
<li> Single activate video track 2
</li>
<li> <a class="twikiLink" href="AssetManager">Drag &amp; drop</a> the  explosion mov file from the <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">ResourceManager</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/ResourceManager?topicparent=Cinelerra.MyCarBlewUp"><sup>?</sup></a></span> / <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">AssetManger</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/AssetManger?topicparent=Cinelerra.MyCarBlewUp"><sup>?</sup></a></span> window into the 2nd video track on the program window.
</li>
<li> Change the <a class="twikiLink" href="OverlayMode">OverlayMode</a> control to "multiply"
</li>
<li> Adjust the timeline to show the full extent of the new clip
</li>
<li> View the clip using the compositor window. 
</li>
</ul>
<p />
<p />
<h4><a name="Synchronizing_the_two_tracks"> </a><a name="Synchronizing_the_two_tracks_"> </a> Synchronizing the two tracks. </h4>
Unless you are incredible lucky, at this point the explosion on the foreground and the transtion between pre &amp; post explosion images is probably out of sync. The easiest way of synch'ing both tracks, is to add blank space at the begining.
<p />
The easiest way to synchronize the background track with the foreground (the explosion itself) is to pad the tracks with "empty" space. Here is how:
<ul>
<li> Measure the amount of time you want to move the clip
</li>
<li> Insert an equivalent amount of blank space (step-by-step?)
</li>
</ul>
<p />
<ul>
<li>
<ul>
<li> Arm the track where you want to add the silence. 
</li>
<li> Select the amount you want to add 
</li>
<li> press shift+space  (insert silence)
</li>
</ul>
</li>
</ul>
<p />
<ul>
<li> Adjust as required.
</li>
</ul>
<p />
<h4><a name="Adding_sound"> </a><a name="Adding_sound_"> </a> Adding sound. </h4>
<ul>
<li> Activate the sound tracks
</li>
<li> Drag the sound mp3 into the audio tracks
</li>
<li> Synch as described above
</li>
</ul>
<p />
<ul>
<li> <img src="../../../pub/Cinelerra/MyCarBlewUp/xtimeline.png" /> <br> This is how the timeline will look when finished
</li>
</ul>
<p />
<p />
<p />
Enjoy !
<p />
Resources: 
The finished video is at <a href="../../../pub/Cinelerra/MyCarBlewUp/homeplosion.mpg" target="_top">explode.mpg</a>  
<p />
<p />
<p />
-- <a class="twikiLink" href="../Main/AlexFerrer">AlexFerrer</a> - 26 Jul 2004
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