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Is there a way to extract an image with no time stamp?
Posted: Mon May 10, 2010 6:54 pm
by Eklectick
Hi Community!
I know there is a way to extract a jpg from the monitors using:
Code: Select all
http://<your_ip_for_zm>/cgi-bin/nph-zms?mode=single&monitor=2&scale=100
Is there a way to extract this same image WITHOUT the timestamp (and without disableing time stamping) ?
Regards!
Re: Is there a way to extract an image with no time stamp?
Posted: Mon May 10, 2010 8:15 pm
by curtishall
No, the time stamp and other OSD is written to the JPEG image itself
Posted: Tue May 11, 2010 5:42 pm
by Eklectick
Thnx Curtis!
On the other hand, I believe ZM captures the image and analizes it or does some magic with it before time stamping, could there be a window here to get it "raw" before timestamp, or is this done in a manner that does not permit extraction?
Regards!
Posted: Thu May 13, 2010 4:29 am
by cordel
The time stamp is actually overlayed prior to being placed in memory, so other than accessing the capture device directly, I don't believe there is a way to omit the time stamp with out disabling it.
Posted: Sun May 16, 2010 1:41 am
by jfkastner
i believe that (with ip cams at least) the pic is captured/requested by zmc, then decompressed, then analyzed by zma, then timestamped and compressed, then saved
you would have to look into the pipeline to read it from some buffer at the right moment
easier would be no timestamps on the pic but write a script that uses the file-create timestamp if needed ... or filename and foldername with the fps calculated.... but since it's all jpg you gotta do lots of decomp/compressing back and forth