Searching ACTIVE-X for video capture with time-Shift

[tomk3]

Hello to all,

i am looking for an active-x / dll if possible to be used in vfp without ".Net connector" which can capture video from USB and IP-cams and can do timeshift rewind and playback while continue capture, no audio necessary)

It seems to be that the viscom products do not have timeshift, I thought of VLC active-x , but did not find samples with timeshift?
I also found avicap, mediacapture, media foundation from MS but to start seems to be very, very hard.


I would be glad if you have recommendations for me (commercial one ok)

Thanks a lot in advance
Tom

 

[Chriss Miller]

Timeshift has multiple meanings, could you clarify what feature you need.

Timeshift sometimes is referred to prerecording up to a maximum length so when you press record you can choose the recording to begin up to that buffered length earlier, i.e. you can wait for something to happen and then react but still have a few seconds up to maybe an hour before, too. Another reference is that you can watch already while the recording still runs, a typical feature of DVR. Both features rely on the same: Buffering of a video stream you can read while it's written. Still, only one or the other feature might be supported and called timeshift and you might need the other. Or even both, perhaps?

What's it for? Security cam? Production process monitoring?

Do you need to support existing cameras or is this the starting point and you not only look for the OCX software part of it, but an overall solution? Then I'd llook into what's offered in hardware including features of the camera itself and bundled software. I guess that's the aspect where more customized software is asked for, but the basis could be more than just the bare capability to record with one or the other timeshift feature.

A quick google search gave me AI assisted industry cameras, for example. Quite sure they don't come with an OCX for own custom software development, but you never know what API about the video recording is supported or what you can control and automate otherwise.

 

[Chriss Miller]

Just a thought about how you can offer timeshift, even if a video recording OCX or DLL only allows recording or playback, not both at the same time: You record in short chunks, maybe only 1s each and then work with these, the only downside is that you have to wait 1s for being able to access that last second, but you can still offer any timeshift, not just full seconds. I almost had a job like this, but that was so long ago, that I don't even remember what cameras and software we tested, that company doesn't even exist anymore.