Screenshot with temperature datas

[Dominik21]

I get a screenshot from my thermal camera (DS-2TD2628-3/QA FW:V5.5.64 build 221212) via ISAPI with the url /ISAPI/streaming/channels/101/picture. But no temperature data are displayed on the picture. In the stream they are showed.
Is it possible to get a picture with the temperature datas?

 

[trempa92]

Have you set Display Rules or Show OSD rules checkmark at Local settings (web interface)

Make sure you run with internet explorer or with egde(page in internet explorer mode) so u can get to Local settings

 

[Dominik21]

thanks but this doesn't work.

 

[trempa92]

Only thing i can provide then, since you are using ISAPI, make a PUT on Overlay1 OSD and screenshot it like that. Since temperature by default is not under OSD overlays its something internal.

So Get TEMP, PUT temp, screenshot

 

[Dominik21]

Do you mean to PUT /ISAPI/System/Video/inputs/channels/overlays/text/ to overlay the temperature values?
Is there an other method to get a screenshot? I'm using c++ on a very old compiler so using the rtsp-stream is a big problem....

 

[trempa92]

yes that what i meant .You have ,I believe 4 overlays/text/id's.

 

[Dominik21]

That wouldn't be enough I've up to 10 Temp. measuring areas with max., min. and average temperature. Plus the lines of the areas...

 

[Dominik21]

If there is no other solution I will write an application in the background, which makes a screenshot from the rtsp-Stream. But this would have at least 2 sec. delay.

 

[trempa92]

I mean you can wait a bit, i can do a test tomorrow. If i come up with anything i'll let you know.

 

[trempa92]

I just tested pulling SS with overlay text id 1. It seems it will fetch the OSD which was added directly into. Cant test thermal since i will have camera tomorrow.

 

[trempa92]

Oh, i just might have found something. You are fetching from NVR. You are using 101 and im using from camera directly. Please try to use this directly from camera:

/ISAPI/Streaming/channels/1/picture

 

[Dominik21]

I mean you can wait a bit, i can do a test tomorrow. If i come up with anything i'll let you know.

of course I'm thankful for your help!

I just tested pulling SS with overlay text id 1. It seems it will fetch the OSD which was added directly into. Cant test thermal since i will have camera tomorrow.

Yes I know this works but I need more than 4 Fields...

Oh, i just might have found something. You are fetching from NVR. You are using 101 and im using from camera directly. Please try to use this directly from camera:

/ISAPI/Streaming/channels/1/picture

No, unfortunately not...

 

[trempa92]

This one is without optical channel

 

[Dominik21]

then i don't know what wrong... that's my result:



and that's my adjustments (sorry that it is german i don't know where to change the language)



and that's a screenshot from the rtsp-Stream.... here it works

 

[trempa92]

Ah the values you see are drawn by directX library, rtsp have the data but ISAPI does not. It requires plugin to be loaded in order to see them on web as well.

How to extract 1 screenshot for a video with ffmpeg at a given time?

There are many tutorials and stuff showing how to extract multiple screenshots from a video using ffmpeg. You set -r and you can even start a certain amount in. But I just want 1 screenshot at, s...

stackoverflow.com

 

[trempa92]

There is 1 other way around but you need to parse image data.(I believe it shows only 1 rule :/)

/ISAPI/Thermal/channels/<ruleID>/thermometry/jpegPicWithAppendData?format=json

 

[Dominik21]

Ah the values you see are drawn by directX library, rtsp have the data but ISAPI does not. It requires plugin to be loaded in order to see them on web as well.

How to extract 1 screenshot for a video with ffmpeg at a given time?

There are many tutorials and stuff showing how to extract multiple screenshots from a video using ffmpeg. You set -r and you can even start a certain amount in. But I just want 1 screenshot at, s...

stackoverflow.com

I'm not realy sure what you mean... do you mean i should use ffmpeg to get the screenshot? which plugin should be loaded where? Why have the ISAPI the data in your case?

There is 1 other way around but you need to parse image data.(I believe it shows only 1 rule :/)

/ISAPI/Thermal/channels/<ruleID>/thermometry/jpegPicWithAppendData?format=json

View attachment 168146

I'm not realy sure whether i did it right, but i removed the head of this file (in the head are no temperature values) and opened it as a picture. This picture doesn't show temperature values as well.

 

[trempa92]

On my image its just the highest and lowest as in yours.

I used long ago ffmpeg to take ss from rtsp stream. So you dont need to do entire app yourself to do that. You can have the exe placed and just call the cmd to capture in your code.

So it seems all my ideas are not working.

 

[Dominik21]

Ah Ok I could't see it good on the picture... i thougt that was an good working example....

So it seems all my ideas are not working.

No I think the idea with ffmpeg is until now the best...thank you for your help I will try how hard the delay is. I think I can run bash-commands in my c++-application. So it wouldn't be difficult to code, i think.

 

[trempa92]

--boundary
Content-Disposition: form-data;
Content-Type: image/pjpeg
Content-Length:6168

BLOB1

--boundary
Content-Disposition: form-data;
Content-Type: application/octet-stream
Content-Length:76800

BLOB2

Did you parse both?