I agree with last response. The DVR is set to record at highest resolution setting (likely to be 4CIF). This records two fields, one 1/50 sec after the other, and then shows them as a combined single image. If the recording resolution is set to less than the maximum (may be specified as 2CIF or a lower pixel res), the DVR will record only one filed. In theory, this reduces the resolution of the picture, but in practice makes it easier to see moving objects.

Why compromise if you can customize. Look for a DVR that can either de-interlace at 4Cif or D1 or reduce the recording settings to 2CIF. This doesn't have to be a PC based solution as there are good Embedded systems out there that offer de-interlacing features.

Isn't this another example of you get what you pay fore ...

Why compromise if you can customize. Look for a DVR that can either de-interlace at 4Cif or D1 or reduce the recording settings to 2CIF. This doesn't have to be a PC based solution as there are good Embedded systems out there that offer de-interlacing features.

Isn't this another example of you get what you pay fore ...

The effect you are seeing is Frame Interlacing, and by changing to Field recording, however the exported Field recording is about 1/2 the Vertical resolution.

What you are seeing is an artifact made by playing the alternating fields and is the moving up and down of each next field by one line, this is very common, but most of the newer DVR softwares can apply de-interlace rendering...in fact even Paintshop type programs can do it, however it takes some CPU load if it is not done by chip.

The faster the movement the more evident and usually the tearing will appear in the direction of the actuall movement.

The human eye picks up changes in the horizontal resolution much better than changes in the vertical and although Field recording may look smoother, this resolution is doubled up when exporting at largere resolutions casuing even more artifacts

I would get new better capture cart like Geovision it does good job with deinterlacing.