Re: [Motion-user] [Fwd: My Mail has been rejected]

[bob <bob...@gm...>]

Not to mention that after a while the cheap cards start to get a bit 
messy when switching inputs, and you end up with a bunch of "motion" 
detected garbage. Best to avoid input switching. If you need 7 cameras 
then buy a card with 8 ports (240fps). I bought a cheap one from China 
on ebay recently and although it took me a while to get it working in 
Linux (no eeprom) I hacked a bit of code and eventually got it working 
nicely.

Bob Story
 _________________________________________
/ Yogi Berra: "You can observe a lot just \
\ by watching."                           /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||



jtd wrote:
> On Saturday 07 March 2009 03:59, Alexander Jahn wrote:
>   
>> Thank you for you hints.
>>
>> Lets take it one step further:
>> - this card seems to be ok: "PV-149 - 8 port video capture card
>> (120FPS)" - one chip (BT878a= 30fps) for every two inputs in split
>> how do I configurate the card/motion that the imagestream is as
>> fluent as possible ?
>> because at the moment, the movement detection(1-2fps) is absolutly
>> rubbish how many fps to i need for a working detection ?
>>     
>
> The moment you switch an input your detection will drop to 2 to 4 fps. 
> You have to use one bt878 per cam or suffer the poor quality. There 
> are no inbetweens.
> So the above card has 4 bt878 and will work very well with 4 cams. And 
> will work at 2 to 4 fps with more than 1 cam per card.
>
>   
>> why do i need a high harddrive performance ? I thought "motion"
>> needs to write some pics to the disk, if a motion is detected, not
>> all the time.
>>     
>
> Once motion is detected you write a full  30 fps mpeg4 file (unless 
> you set it for snapshots). Since you dont know how long or how many 
> cams will detect motion, you have to assume worst case.
>
>
>