PCI CARD AND PCI-E card?

[jobschen 0]

now more and more manufacture has PCI-E card, is it really necessary?

[CollinR 0]

Depends.

 

How is the encoding done? How many channels of video? On the card transcoding? On the card analytics?

 

I think this is more for software encoders then anything else, they transfer uncompressed video to the CPU for each channel captured.

[Thomas 0]

now more and more manufacture has PCI-E card, is it really necessary?

 

Yes. There are throughput issues when dealing with standard PCI busses. it's not very hard to reach them. Moving to the PCI-E bus allows for greater use of software compression, a better choice in the long term over hardware compression.

[destro_23 0]

Moving to the PCI-E bus allows for greater use of software compression, a better choice in the long term over hardware compression.

 

With that being said.. is it just me that notices quality goes down slightly on hardware compression cards? vs Software compression?

[Thomas 0]

Moving to the PCI-E bus allows for greater use of software compression, a better choice in the long term over hardware compression.

 

With that being said.. is it just me that notices quality goes down slightly on hardware compression cards? vs Software compression?

 

It tends to depend on the quality of the codec used for the hardware and software. It's easier to get a better picture out of a software codec, you can allow for greater use of resources. And over time you can upgrade a software codec.

[CollinR 0]

It just depends on the encoding, good HW encoders are almost impossible to tell from the source. However most don't have good encoders so it wind up being somewhat of a wash.