Free motion detection software software for windows

VirtualDub MSU Motion Estimation Filter is a useful tool that performs motion estimation and compensation in a video stream. It allows to show macroblocks partition and motion vectors as well.
Main features:
Search area - area of motion vector search.
- Horizontal maximum motion - maximum length of motion vectors horizontal projection. Can take on values from 1 to 100.
- Vertical maximum motion - maximum length of motion vectors vertical projection. Can take on values from 1 to 100.
Block sizes - Block sizes used in motion estimation.
- Maximum block size - maximum size of a block.
- Minimum block size - minimum size of a block.
Motion estimation algorithm - the algorithm of motion estimation.
Horizontal precision - horizontal precision of motion vector search.
- Pixel - pixel precision.
- Half pixel - half pixel precision.
- Quarter pixel - quarter pixel precision.
Vertical precision - vertical precision of motion vector search.
- Pixel - pixel precision.
- Half pixel - half pixel precision.
- Quarter pixel - quarter pixel precision.
Output - output of the filter.
- Show compensated frame - show frame after motion compensation.
- Show residual after motion compensation - show the residual between the original frame and the compensated one.
- Show residual without motion compensation - show the residual between the original frame and the previous one.
- Show MVs - show macroblocks partition and motion vectors (the mode is unavailable if Show residual without motion compensation is chosen).
Extra - extra settings.
- Borders allowed - allow compensation from blocks, exceeding the frame borders.
- Colorspace - the colorspace to perform motion estimation in.
- Halfpel interpolation algorithm - the algorithm of half pixel interpolation.
Log - logging of filter statistics.
- The following indexes are saved: the time of filter execution, FPS, the algorithm of motion estimation, motion vector search area, allowed block sizes, a mean number of SAD calculations per pixel.

Informant is a free and professional video recording software used to capture and store video from single or multiple cameras. It was designed for business uses including video monitoring of offices and buildings and logging of in-store cameras but it has a broad range of possible applications.
This software can record multiple video channels simultaneously with automated motion detected start and stop if required. The number of video sources that the application can record from is only limited by your PCs capacity. Images can be streamed to a central computer, uploaded to the internet via FTP or stored in a local computer. The recordings are automatically compressed for archiving. Later they can be searched by date, time, line or other data using the software directly.
Main features:
- Records multiple cameras simultaneously. Number limited only by hardware.
- Motion detection recording saves spaces by recording only when something is happening.
- Email/SMS alerts for motion detection.
- The frames are automatically time stamped so it can be used as evidence if required.
- Web access to view recordings remotely.
- Save to a network folder.
- Back up recordings via FTP.
- Video can be monitored on the screen as it records.
- Easy to use for reliable day-to-day operation