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--- visual3d:documentation:dialogs:video [2024/06/19 13:56] – created sgranger
+++ visual3d:documentation:dialogs:video [2024/07/12 13:28] (current) – removed sgranger
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-Visual3D does not process Video data. For example, it is not possible to identify locations manually by digitizing a series of Video images. Visual3D expects to receive data in the format of 3D points, ANALOG data, or 6 Degree of Freedom segments.
-We are receiving an overwhelming number of requests for simple processing of Video images, so we are currently evaluating the idea.
-We can certainly see the value in having simple 2D digitizing and analysis for use in teaching because this allows students to become acquainted with Visual3D before working in a laboratory. We welcome input from the community in identifying the basic requirements and cost of such an addition to Visual3D.
-===== Playing Synchronized Video and MoCap animation =====
-**Visual3D will automatically play Motion Capture data and synchronized video.\\
-For example, download a [[https://www.has-motion.com/download/examples/ExampleVideo1.c3d|ExampleVideo1.c3d]] and synchronized video file [[https://www.has-motion.com/download/examples/ExampleVideo1.avi|ExampleVideo1.avi]]\\
-You can load the AVI file two ways:** (both methods are described below)
-  - File-> Open and selecting both files
-  - File -> Add/Modify Synchronized Video Files
-==== Using File-> Open ====
-|**(A)** Launch Visual3D and open both files  |  {{videoExample1_1.gif}}|
-|**(B)** Switch to **Signal and Event Processing Mode.** and make the **ExampleVideo1.c3d** file active by selecting in the pulldown menu. You should see a Video View and the Motion Capture View. Playing the motion capture data should synchronize with the Video image. If you do not see the video, make sure that **View Synchronized Video** is selected in the View menu.  |  {{videoExample1_2.gif}}|
-==== Using Add/Modify Synchronized Video Files ====
-**(A)** Load the C3D files into Visual3D.
-**(B)** Go to File -> Add/Modify Synchronized Video Files
-**(B) 1.** In the dialog that appears, select the relevant C3D file. Then click "Associate Video File with Selected Motion File" and browse to the desired avi file.
-==== Changing Video size ====
-The size of the video window can change by clicking on one of these buttons: "25%", "50%", "100%", "200%", or enter in a custom value.
-===== Export 3D Viewer Animation to AVI =====
-Visual3D can create/export video of the 3D viewer animation. To do export/create an AVI video file of the 3D viewer animation select **Export** from the **File** menu. Then select **Export Animation to AVI**. A dialog box will appear that will allow you to select the range of frames, frame rate, and size of the video.
-=== Stuttering playback of avi files ===
-A user identified an issue that we will use as an illustration of video export settings.
-Question: When exporting/creating an AVI of an animation (target data captured @ 100 Hz) with the following settings, we get a stuttering playback (stops, starts, skips quite a few frames). Similar issues are seen at other Frame rates / output sizes. Is this a codec issue or a Visual3D software issue?
-{{ExportAviDlg.gif}}\\
-Answer: At 50 frames/second the AVI file is probably very large. The problem is usually with reading the file from the hard drive fast enough to animate it. Try 25 frames/second and see if that works any better (25 fps is close to the PAL format of 24fps). For just playing video, 25fps should be sufficient.
-If you have any other software to convert video, you can also take the output AVI file and convert it to a compressed format, such as mpg, or windows media format.