Common reasons for jerky videos: Graphics Adapters

Carrying on from our last two posts which looked at reasons such as Network and CPU issues that could be making your video streams jerky.  Another reason for jerky and not smooth video – could be your graphics card.

Video display requires specialist hardware to optimise frame rate, image quality and refresh rates, so use a good graphics card (GPU).  Like wine and hotel rooms there is a simple rule when buying a card – generally the more you spend the better it is.  Other factors to consider are what connections you need (HDMI, DVI, VGA) and how many monitors you need (you can ignore 3D rendering options).

Since most people will use H.264 codec for compression to improve network utilisation the load is put onto the CPU to decode which means you don’t need high end gaming GPUs to get improved graphics but the one with a good solid driver to ensure a stable experience.

Deciding which graphics card to buy is also affected by how it is going to be used. Most graphics cards are only good for 1 screen; designed for single display or dual outputs such as DVI and/or HDMI and offer a range of connections to best suit different needs (display port, mini HDMI and VGA). They will often work perfectly fine with multiple connections being utilised. If you are after quad screen then you will need something designed for this (but you don’t need a graphics card which is to be used with 3D rendering and designing).  When using multiple screens it is also important to remember that each camera comes with a CPU overhead.


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