Device Input

1. Connect A/V grabbing card to a camera

   A/V port is so common that almost all digital video camera support A/V output.
   Advantage: AV cable supports long distance transfer at cheap price.
   Disadvantage: AV grabbing card uses analog signal, whose quality is inferior to 1394 card.

   To use A/V input for the software, you should by an AV grabbing card:
   AV grabbing card: widely available on the market.

2. Connect 1394 card to a camera.

   1394 card has been the standard interface in video field, which is supported by most professional or consumer level cameras, and notebook computer also is configured with the port as a standard.
   Advantages: higher quality signal that is digitally transferred, suitable for high-end users.
   Disadvantages: shorter transfer distance, 1394 relay is needed to prolong the effective distance, so the price is higher. One 1394 card can only connect to one DV.

   To use 1394 card for the software, you should buy a 1394 card/grabbing card:
   Notebook computer: need a PCMICA 1394 card (all notebooks contain 1394 port)
   Desktop computer: need a PCI/PCI-E 1394 card
   At present, it is recommended to use one card for one DV, it is not recommended to use cascade connection via such as 1394 HUB or to connect all the ports of the card to DVs

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   To prolong the 1394 connection distance, you should be a relay:
   Due to the signal attenuation in 1394 cable, it is better not to connect for longer distance, or it is recommended to use 1394 cable with DV relay to connect the camera, thus the distance can be as long as 200m without signal attenuation.
   

3. Connect camera with SDI port.

   SDI port is widely used at broadcasting level, e.g. television stations.
   Advantage: support SDI signal I/O and other broadcasting level equipment
   Disadvantage: expensive.

   To use SDI port for the software, you should buy a SDI grabbing card