请问市面上单个878A芯片四路输入的视频采集卡是否都能做二次开发?

市面上很多三四百元的杂牌采集卡
不知道是不是都能用来做二次开发?
我要用在DELPHI里面调用采集静态图象
不知道能不能用VFW来进行编程调用
请教各位大侠

BT878的公板驱动做得不怎么的。要做四路比较困难，也能做，但效果没有你想象中那么好。

关于bt878和PICO2000我作过不少工作,不过都是\"补丁\"型的,对芯片自然也熟悉了:
     首先完全可以用VfW,当然要使用支持VfW的驱动.

Bt878 is a very good chip if you just need CIF size.
for just one channel video you can capture at full speed:30FPS(ntsc) or 25FPS(pal), if you use the internal mux to switch more than one input without external synchroiztion, the max. speed can reach about 15FPS(ntsc) CIF size totally, in this case, you have to write your driver properly. i have made one work at about 15FPS and can\'t get faster because the video will not stable if capture to faster while switching inputs.
if you have bought a made ready board then you need to check the driver and application interface. some may apply certain restrictions.

by the way, 878 seems has problem when capture in full size, the odd field and even field is not come from a same frame, you can see the jion adge when something is moving faster.