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Главная » 2008 » Ноябрь » 14 » Cinelerra is very easy - 3/3 // Linux
Cinelerra is very easy - 3/3 // Linux
22:14

tut5fin4

In this film howto trilogy, we'll finish our DVD photo album with Cinelerra. As you can see, Cinelerra is very powerful, even without 3d transitions ( for now ) it has a user interface that can make anything possible. But on this tutorial, we'll only cover the steps to make our DVD.

Before continuing, here are a couple of tricks: If you have an opengl 2.0 video card ( as with the new nvidia cards with proprietary drivers ), you can use the x11-opengl to speed up preview using Settings > Preferences > Playback > Video driver.

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If you are not one of these lucky users, you must go to Settings > Preferences > Performance and enable "Use Background Rendering". This way, Cinelerra will make a motion jpeg sequence as a preview. Mind that this requires quite a bit of free disk space. If you do not have a lot of space, you can set a lesser jpeg quality with the tool symbol near Video.

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Now, go back to the Cinelerra main window and you can see a red progress bar ( the preview "cocking") .

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Come back to our Tutorial
Add two video tracks

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now put two images with same time start time and duration. As you can see, the top image hides the bottom image.

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Be sure that on Settings > Format you have set RGBA or YUVA. before going on to the next step. This way, Cinelerra can use transparency. Do not use interlace at the moment..

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select the top image and drag ChromaKey ( from Resources > video effects ) onto it.

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Now enable "generate keyframe when tweaking" and make a frame at the beginning without change, and one at the end that hides the whole image.

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And now, why not do some zoom eye-candy?. Make the sector Z (blue line) bend like this:

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on the compositor, you should be able to see somenthing like this.

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As you know, the keyframe works very quickly and smart. Note: the fade keyframe is linked to all other video tracks, so before starting to work with fade, it is useful to press Shift+Tab on a selected video track. This way all other tracks will be set in "non-armed" mode. In this pic you can see a "simple" transition with fade:

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but you can also use a video transition. All you need to do is place it at the start and end of the top video track.

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Cinelerra titleing is very complex and well may be a topic for our next tutorial, for now I will explain a little trick that can help you to make an impressive title. Open gimp and choose any Xtns > Logos

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make a logo

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and on Menu window Dialogs choose Layers

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delete the layer on bottom
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now you can see something similar to the pic:

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The gray squares represent transparency. Save the file with a .png suffix and load it into Cinelerra. Now add another video track ( no one said we can't use more video tracks - they're free :) ), and paste the gimp-created image onto it. Move, fade, zoom... add all the effects you want... the title is ready!

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If you want to add a videoclip, add 3 extra audio tracks ( 2 for music and 1 for the videoclip's audio ). In order to have stereo sound, we must modify the settings as seen in the next pic.

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After adding your favorite song, your video begins to take shape...

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A little suggestion here: do not use too many effects. Your purpose is to show your photos as best you can. A good way to show your photos is to add all to one video track and do a slow move. Be sure not to drag them off the screen, and add only fast transitions. The music does make a difference..
To zoom, make x and y bends this way:
make sure that on the View menu you have selected x-y-z camera and press 2 to hide the transitions. Now with the zoom-x-y selector on main bottom bar adjust the z-x-y line on the video track equally. Now click on the line and draw the curves.
As you can see, this is a very useful method!

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Use another track if you want to make a transition between two photos with very different sizes.

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For the video clips, load and insert them between video and audio tracks. Note: you can use the viewer to cut the clips or you can cut it and insert it on other clips directly on the track (minding "arm" status)

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When you are satisfied with your work, you can export it to an mpeg4, as explained in part two, and burn it on DVD. To make a DVD, we'll use qdvdauthor. On my Akirad repository you can find a special rebuild of qdvdauthor with some fixes, like build optimization, buttons and mplayer+xine support. If you have Ubuntu, and my repository enabled, type this in a terminal:
sudo apt-get install qdvdauthor-akirad
Start qdvdauthor. On the tools menu, install templates. You should see this:

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Click on Connect

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Select all thumbnails you want to import- now you can install them for the current user (default) or all users ( needs admin password )

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Now click on Add / Organize video. Note: if you see:

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insert a name for you project and browse for a DVD destination folder. I used a DVD folder in Home. On qdvdauthor, choose the video file and use Autogroup.

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Now you can add all Videos made with Cinelerra. Go to DVDauthor > Add from Template and choose one

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Now you can drag and drop the thumbnails on the template and do this next:

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you can see:

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If your video is very long, you can edit and add automatic chapter selections.

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Now you can see:

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now you must configure all buttons- use right mouse button and be sure that all scene selections jump to our video

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We are ready to make a DVD! Click on:

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and you will see:

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check the bottom flag and insert an empty DVD

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click OK.

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your DVD is done!
If you want to check that your DVD works,
  • disable burn
  • click OK
  • open the video with gxine dvd:/$HOME/dvd
  • burn it with: growisofs -Z /dev/dvd -dvd-video $HOME/dvd
That's all for now.

Previous Tutorial: Cinelerra is very easy - 1/2


Источник: www.akiradproject.net
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