Useful Video Post Procedures
 
 
 
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Rendering menu Video Post

There are some tasks that you will use Video Post for more than others. This primer describes some of the more common sequences you'll find yourself using Video Post to create. The procedures are outlined in their simplest forms.

The following procedures are outlined:

Procedures

Example: Make an object glow:

One of the most common things you'll want to do with the Glow filter is make an object glow. Here's how to do it in its simplest form.

  1. In the Perspective viewport, create a Sphere with a radius of about 30.
  2. Choose Rendering Video Post.
  3. Click Add Scene Event and set the view to Perspective.

    Click OK to close the Add Scene Event dialog.

  4. Click Add Image Filter Event and choose Lens Effects Glow from the Filter Plug-In list.

    Click OK to close the Add Image Filter Event dialog.

  5. Click ( Add Image Output Event) and then click Files.
  6. Set the output file format to BMP Image File and enter a filename like MyGlow.

    Click Save when you've set the name and format

  7. Click OK to accept the default setting on the BMP configuration dialog.

    Then click OK to close the Add Image Output Event dialog.

  8. Right-click the Sphere to bring up the Quad Menus and select Properties.
  9. Set the Object Channel in the G-Buffer group to 1 and click OK.
  10. Click ( Execute Sequence).
  11. Click Render on the Execute Video Post dialog.

    You'll see the a glowing sphere in the render window.

Example: Create an animation from a series of still images:

Another common process you'll use Video Post to achieve is taking a series of still images you've rendered and convert them to an animation. To accomplish this task, you need an IFL file.

  1. Use the IFL Manager Utility to create an IFL file containing the sequentially number image files you want to process.
  2. Choose Rendering Video Post.
  3. Click ( Add Image Input Event), and then click Files.

    Choose the IFL file you created at step 1 and then click Open to close the selection dialog.

  4. Click OK to close the Add Input Image Event dialog.
  5. Click ( Add Image Output Event), and then click Files.
  6. Set the output file format to AVI File and enter a filename like MyAnimation.

    Click Save when you've set the name and format

  7. Select a codec from the Video Compression dialog and click OK.

    Then click OK to close the Add Image Output Event dialog.

  8. Click ( Execute Sequence).
  9. Click Render on the Execute Video Post dialog.

    The final product is an animation.

Example: Render a scene with a starfield:

At some time, you'll want to create a night scene that requires a starry sky. The key thing to remember when creating a star field is adding a camera to the scene. The Starfield filter only works with a camera. Here are the steps to set that up.

  1. In the Top viewport, create a Sphere with a radius of about 30 and a Target Camera.

    Place the camera to one side and have it pointing at the center of the sphere.

  2. Right-click in the Perspective viewport and press C to change the viewport display to Camera01.
  3. Choose Rendering Video Post.
  4. Click ( Add Scene Event), and make sure the view is set to Camera01.

    Click OK to close the Add Scene Event dialog.

  5. Click ( Add Image Filter Event), and choose Starfield from the Filter Plug-In list.
  6. Click the Setup button to open the Stars Control dialog. Make sure Source Camera (at the top) is set to Camera01, and then click OK.
  7. Click OK to close the Add Image Filter Event dialog.
  8. Click ( Add Image Output Event), and then click Files.
  9. Set the output file format to BMP Image File and enter a filename like MyStarfield.

    Click Save when you've set the name and format

  10. Click OK to accept the default setting on the BMP configuration dialog.

    Then click OK to close the Add Image Output Event dialog.

  11. Click ( Execute Sequence).
  12. Set the time output to Single and click Render on the Execute Video Post dialog.

    The final product is a rendered image of a sphere against a starry background.

Set up a simple cross fade between two images:

Sometimes you want to transition from one view or animation to another. This set of steps with show you how to set up a cross fade from one image to another. For this example the complete cross fade will occur over 20 frames displaying the first image for five frames, cross fade for ten frame and then display the second image for the last five frames.

The resulting animation produced by this process could be used as an Image Input Event for a different Video Post sequence.

  1. Choose Rendering Video Post.
  2. Click ( Add Image Input Event), and then click Files.

    Choose your first image and click Open and then click OK to close the Add Image Input Event dialog.

  3. Click (Add Image Input Event) again, and then click Files.

    Choose your second image and click Open and then click OK to close the Add Image Input Event dialog.

  4. Click ( Add Image Output Event), and then click Files.
  5. Set the output file format to MOV File and enter a filename like MyXFade.

    Click Save when you've set the name and format

  6. Click OK to accept the default setting on the Compression Settings dialog.

    Then click OK to close the Add Image Output Event dialog.

  7. Select the first Image Input Event and then hold down the Ctrl key while selecting the second Image Input Event.

    Both events will highlight in gold.

  8. Click ( Add Image Layer Event), and choose Cross Fade Transition from the list of compositors and transitions.

    Click OK to close the Add Image Layer Event dialog. Notice how the Image Layer Event becomes the parent of the two Image Input Events.

  9. Click (Zoom Extents) to view the entire set of tracks.
  10. On the Queue track bar, click and drag the right-hand end of the range-bar to frame 20.

    This adjusts all the tracks.

  11. Select the Cross Fade Transition event and drag the left-hand end of the range-bar to frame 5 and then drag the right-hand end of the range-bar to frame 15.

    This sets the period in time when the cross fade occurs.

  12. Select the track for the first Image Input Event and the right-hand end of the range-bar to frame 8.

    By setting the end to frame 8 instead of 5, you'll have three frames during which the first image will fade to black.

  13. Select the track for the second Image Input Event and the left-hand end of the range-bar to frame 12.

    Similarly, setting this end to frame 12 ensures that the second image will fade in over three frames and display in full color for the last five frame of the transition.

  14. Click ( Execute Sequence).
  15. Click Render on the Execute Video Post dialog.

Example: Resize a series of images:

Perhaps you've rendered a series of still images but it turns out they were at the wrong resolution. You might normally think you have to re-render the entire scene again which will tie up all the systems to do the same work they just completed. Video Post can be used to resize the images without having to use all the systems.

  1. Use the IFL Manager Utility to create an IFL file containing the sequentially number image files you want to resize.
  2. Choose Rendering Video Post.
  3. Click ( Add Image Input Event), and then click Files.

    Choose the IFL file you created at step 1 and then click Open to close the selection dialog.

  4. Click OK to close the Add Input Image Event dialog.
  5. Click ( Add Image Output Event), and then click Files.
  6. Set the output file format for the new set of still images to TGA and enter a filename like MyResize.

    Click Save when you've set the name and format

  7. Click OK to accept the default setting on the Targa Image Control dialog.

    Then click OK to close the Add Image Output Event dialog.

  8. Click ( Execute Sequence).
  9. On the Execute Video Post dialog, set the new output resolution you want for the images and then click Render.

    When the rendering is complete, you will have a new series of resized images that have a name prefix of MyResize. So, if there were ten images listed in the IFL file, there will be ten new images named MyResize0000.tga through MyResize0009.tga stored in your image folder.

Example: Composite two image sequences:

Compositing two sets of images together is one of the “workhorse” operations of Video Post. This is commonly done when a project is nearing completion and it lets you combine all the images your artists have been rendering.

  1. Use the IFL Manager Utility to create an IFL file for each set of images sequences you want to composite.
  2. Choose Rendering Video Post.
  3. Click ( Add Image Input Event), and then click Files.

    Choose your first IFL file and click Open and then click OK to close the Add Image Input Event dialog.

  4. Click (Add Image Input Event) again, and then click Files.

    Choose your second IFL file and click Open and then click OK to close the Add Image Input Event dialog.

  5. Click ( Add Image Output Event), and then click Files.
  6. Set the output file format to MOV File and enter a filename like MyComposite.

    Click Save when you've set the name and format

  7. Click OK to accept the default setting on the Compression Settings dialog.

    Then click OK to close the Add Image Output Event dialog.

  8. Select the first Image Input Event and then hold down the Ctrl key while selecting the second Image Input Event.

    Both events will highlight in gold.

  9. Click ( Add Image Layer Event), and choose Alpha Compositor from the list of compositors and transitions.

    Click OK to close the Add Image Layer Event dialog. Notice how the Image Layer Event becomes the parent of the two Image Input Events.

  10. Click ( Execute Sequence).
  11. Click Render on the Execute Video Post dialog.

Example: Render a scene over an image sequence or an animation:

This process in similar to the last one except you might have an animation or series of still images you want to use as the background for your existing scene.

  1. Use the IFL Manager Utility to create an IFL file for the set of images that will be the background for your current scene.
  2. Choose Rendering Video Post.
  3. Click ( Add Image Input Event), and then click Files.

    Choose your IFL file or animation and click Open and then click OK to close the Add Image Input Event dialog.

  4. Click Add Scene Event and set the view to Perspective or a Camera you have in the scene.

    Click OK to close the Add Scene Event dialog.

  5. Click ( Add Image Output Event), and then click Files.
  6. Set the output file format to AVI File and enter a filename like MyScene.

    Click Save when you've set the name and format

  7. Select a codec from the Video Compression dialog and click OK.

    Then click OK to close the Add Image Output Event dialog.

  8. Select the first Image Input Event and then hold down the Ctrl key while selecting the Scene Event.

    Both events will highlight in gold.

  9. Click ( Add Image Layer Event), and choose Pseudo Alpha from the list of compositors and transitions.

    Click OK to close the Add Image Layer Event dialog. Notice how the Image Layer Event becomes the parent of the two Image Input Events.

  10. Click ( Execute Sequence).
  11. Click Render on the Execute Video Post dialog.

    Notice that the Image Input Event in this example is only ten frames long. Normally, you'd choose a set of background images that equals the number of frames in your scene. When this sequence is executed, as is, the images in the IFL file will only appear for the first ten frames and then disappear.

  12. Select the Image Input Event just under the Pseudo Alpha layer event.
  13. Add a Loop Event, and set the number of times to 4.

    The Image Input Event becomes further nested in the queue. If you want, you can use the default Loop setting or change it to Ping Pong then click OK to close the Add Loop Event dialog.

  14. Click (Execute Sequence) again and render the scene.

Join two animations end to end:

If you're working in a production environment, you probably do not work on an entire animation by yourself. Instead, you might work on one part while other artists are working on other parts. At the end of the project, everyone's animations need to be joined together.

  1. Choose Rendering Video Post.
  2. Click Add Image Input Event), and then click Files.

    Choose your first animation file and click Open and then click OK to close the Add Image Input Event dialog.

  3. Click (Add Image Input Event) again, and then click Files.

    Choose the next animation file and click Open and then click OK to close the Add Image Input Event dialog.

  4. Repeat the last step for any other animations that need to be joined.
  5. Click ( Add Image Output Event), and then click Files.
  6. Set the output file format to MOV File and enter a filename like MyFinal.

    Click Save when you've set the name and format

  7. Click OK to accept the default setting on the Compression Settings dialog.

    Then click OK to close the Add Image Output Event dialog.

  8. Select the first Image Input Event and then hold down the Ctrl key while selecting the second Image Input Event.

    Both events will highlight in gold.

  9. Click ( Abut Selected).
  10. Repeat the last two step with subsequent Image Input Events.
  11. Click (Zoom Extents) to view the entire set of tracks.
  12. Select the Image Output Event and drag the right end of the range-bar to match the total number of frames in the queue.
  13. Click ( Execute Sequence).
  14. Click Render on the Execute Video Post dialog.

Switch between views:

It's not often that a final scene shows views from only one viewpoint. Either the camera moves or there are multiple cameras from which images are rendered. This sequence shows you how to switch from one camera view to another.

  1. In the Perspective viewport, create a Box with a length of 15, a width of 30 and a height of 15.
  2. In the Top viewport, create two Target Cameras pointing at the box from different angles.
  3. Click or right-click the Point-Of-View (POV) viewport label in the Left viewport. From the POV viewport label menu, choose Views Camera01.
  4. Click or right-click the POV viewport label in the Perspective viewport. From the POV viewport label menu, choose Views Camera02.
  5. Choose Rendering Video Post.
  6. Click ( Add Scene Event), and set the view to Camera01.

    Click OK to close the Add Scene Event dialog.

  7. Click (Add Scene Event) again, and set the view to Camera02.

    Click OK to close the Add Scene Event dialog.

  8. Select the first Scene Event and then hold down the Ctrl key while selecting the second Scene Event.

    Both events will highlight in gold.

  9. Click ( Abut Selected).
  10. Click in an empty part of the queue to deselect the two Scene Events.
  11. Click ( Add Image Output Event), and then click Files.
  12. Set the output file format to MOV File and enter a filename like MyViews.

    Click Save when you've set the name and format

  13. Click OK to accept the default setting on the Compression Settings dialog.

    Then click OK to close the Add Image Output Event dialog.

  14. Click ( Execute Sequence).
  15. Click Render on the Execute Video Post dialog.

Render a scene in reverse:

It's not commonly done but when you need to render a scene in reverse you could spend hours trying to accomplish it. Video Post makes it easy.

  1. Choose Rendering Video Post.
  2. Click ( Add Scene Event), and set the view to Perspective or a camera in the scene.
  3. In the Scene Range group, turn off Lock To Video Post Range and set the Scene Start value to the last frame of animation.
  4. Turn off Lock Range Bar To Scene Range and set the Scene End value to 0.

  5. Click OK to close the Add Input Image Event dialog.
  6. Click ( Add Image Output Event), and then click Files.
  7. Set the output file format to AVI File and enter a filename like MyReverse.

    Click Save when you've set the name and format

  8. Select a codec from the Video Compression dialog and click OK.

    Then click OK to close the Add Image Output Event dialog.

  9. Click ( Execute Sequence).
  10. Click Render on the Execute Video Post dialog.