New In Version 2.0

My recording flashes bright and dim during analysis when I move the Motion Amplification® slider. What could be wrong?

Behavior in Versions 2.3 and earlier:


When you record a video the "Lighting" selection will optimize the recording settings to reduce the flicker found in lighting supplied by Alternating Current (AC). This flicker will be at 50 or 60 Hz depending on your local electrical line frequency. Normally, the recording will be made at twice this line frequency. If the frame rate is set at a frequency other than twice the line frequency a beating (beat frequency) between the frame rate and lighting may occur. If you have selected "Other" as your Lighting selection then manually adjusted the frame rate so that it is no longer twice the line frequency, as you amplify the recording, the flickering will change the intensity of the lighting on the asset making it appear brighter and dimmer. To reduce this affect, you can either:


  1. Rerecord the video making sure to record at twice the electrical line frequency
  2. Filter your existing recording to eliminate the 50 or 60 Hz frequency


The Camera Properties window in Version 2.3 and earlier:

Version 2.4 UPDATE


To simplify the recording process, the Acquisition Mode and Lighting settings have been removed from the user interface. Now, all that is required is to slide the "Framerate (fps)" slider to the needed setting.


The Camera Properties window in Version 2.4 and newer:



Related Articles:


What are some of the challenges when recording indoors?

What are some of the challenges when recording outdoors?

How can I reduce the size of an MP4 export? (Export length)

Reduce the length of the exported recording


This method is available in Versions 2.0 and newer.


In some cases, where the motion is repetitive in nature, it may not be necessary or possible to export the entire video. To reduce the size of a Motion Amplification® recording which has already been analyzed, you can select the amount of the recording you want to export. Follow these steps to select the amount of the recording to export:


  1. Open the recording you want to analyze and export
  2. Find the section of the recording which best displays the motion you want to highlight
  3. Locate the Playback Bar, found just below the video window
  4. You will notice green triangles at the far left and far right below the Playback Bar. These triangles indicate the portion of the video which will be exported to MP4. You can adjust the location of these triangles.
  5. With the cursor, move the Playback Position Indicator to the location where you want the export to begin
  6. Right-click on the Playback Position Indicator to reveal a pop-up window
  7. From the selections in this menu, select "Set Export Start." The green triangle from the left will move behind the Playback Position Indicator's current location
  8. Use the cursor to move the Playback Position Indicator to the location where you want the export to end
  9. Right-click on the Playback Position Indicator to reveal a pop-up window
  10. From the selections in this menu, select "Set Export End." The green triangle from the right will move behind the Playback Position Indicator's current location
  11. The region between the two green triangles will be the portion of the original video exported to MP4
  12. Click the "Export Video" button  found to the right of the Playback Bar

  13. Navigate to the "Videos" folder to find the exported video (default location - C:UsersUserDocumentsRDIVideos - where User will be replaced by the actual User Name of the current account).

 

Version 2.5 UPDATE:


The method for adjusting the Export Start and End positions was improved in Version 2.5. From that version on, you can simply click, hold and drag on the green triangles and move their positions.



Adjust the green triangles as necessary until you achieve the size MP4 you desire.


Watch the attached video for an example.


Related articles:

Why do some questions have multiple answers?

Can I amplify only a portion of the exported MP4 video?

How can I reduce the size of an MP4 export? (Playback speed)

How can I reduce the size of an MP4 export? (Video Format and Quality)

How can I reduce the size of an MP4 export? (Original and Amplified Frames)

I'd like to use a filter but need to know how many the Motion Amplification software supports and what they do.

The Motion Amplification software can support all of the following filters as described in detail below. They can be applied individually or in combinations. In all of the examples below, the areas in green will be included in the video while the areas in red will be excluded. Because of their behavior, only one Bandpass, one Lowpass, and one Highpass filter can be applied to a video. You can use all three on the same video, but only one of each type. You can add as many Bandstop Filters as you need.


Bandpass Filtering


A bandpass filter will only allow frequency content between the low and the high cutoff to be amplified.  All other frequency content will be excluded from amplification. When you select "Bandpass" from the "Type" dropdown, you will be allowed to enter your "Low Cutoff" and "High Cutoff" values. You can either use the keyboard to type values into the fields directly, or use the cursor to drag the red circles on the spectrum display to the area of interest. In the example below, only motion related to frequencies between 16.6 Hz and 17.8 Hz will be amplified in the video.



Lowpass Filtering


A lowpass filter will only allow frequency content below the high cutoff to be amplified. All other frequency content will be excluded from amplification. When you select "Lowpass" from the "Type" dropdown, you will only be allowed to enter your "High Cutoff" value. You can either use the keyboard to type the value into the field directly, or use the cursor to drag the red circle on the spectrum display to the area of interest. In the example below, only motion below 3.8 Hz will be amplified in the video.