Example Shot and Metadata

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Post Production Workflows - Example Shot and Metadata

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Example Shot and Metadata

An example package containing matching green footage, the real tiem Previzion composite output, and an example tracking data take/thumbnails can be downloaded here. The video files and image sequences have been compressed to save download time.

The video clips and image sequence correspond to the timecode in/out of 19:57:31:00 to 19:57:46:00, or 15 seconds of 29.97 PsF video.

This package contains:

comp-19-57-31-00–19-57-46-00.m4v: the Previzion composite video
green-19-57-31-00–19-57-46-00.m4v: the original green feed
example_tracking.ma — an Maya ASCII file extracted from the DAE take file with Take Converter, at the timecode in/out points specified
composite_sequence folder: the composited Previzion video, extracted into a JPEG image sequence
example_take, the original Previzion generated take folder, with the Collada DAE take file and thumbnails generated automatically every 10 seconds during the take

Example Maya Import Sequence

To bring take data and video together in Maya, follow the following steps (tested in Maya 2011):

Import the example_tracking.ma file into Maya.
In Maya, go to Window->Settings/Preferences->Preferences, select Settings, and change the Time to NTSC (30 fps). Click Save.
In the viewport window, select Panels->Perspective->test_PrevizionCamera0Node.
Open the Outliner window. Open the group, and select the test_PrevizionCamera0Node.
Select Environment, then Image Plane->Create. Click the folder next to Image Name, and select the composite_001.jpg image in the composite_sequence directory.
Check Use Image Sequence.
Scroll down and set the Depth to 1000.
Change the timeline display endpoint to 450 frames, to see the entire tracking shot.
You can now scrub back and forth in the timeline, and see the virtual ground plane aligned with the composited images from Previzion.
If you go to Panels->Perspective->persp and press a, you’ll see the entire scene, including the tracking camera, the virtual ground plane, and the camera image plane.
If you now place a CG object so that its lower edge is at Y=0 and is in the visible field of view of the Previzion tracking camera, the CG object will appear to rest on the ground as the camera moves.
Make sure the Previzion camera node is selected in the Outliner window, then select Window->Animation Editor->Graph Editor to see the various animation curves that have been brought into Maya.