Motion-Detection Filter for VLC?

Feature requests for VLC.
Cobalt
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Motion-Detection Filter for VLC?

Postby Cobalt » 07 Apr 2011 13:43

Hello,

I am searching for a software-plugin for VLC (or other common free software), which can detect movements in videos (Motion Detection).

I have many surveillance videos which I must work through. It would take months to do so with my own eyes.

Isn't there a Plugin/Filter für VLC (, AviSynth, VirtualDub,) which either tells me the positions with changed content or best, directly jumps some seconds before the real movement/change in the video and shows the video from there. Best would be some configurable Setting with trigger threshhold)? Can VLC do 'scene detection', maybe this would do it.

Thank you.

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Re: Motion-Detection Filter for VLC?

Postby Jean-Baptiste Kempf » 07 Apr 2011 17:32

There is already one, by default in VLC.
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lovelove
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Re: Motion-Detection Filter for VLC?

Postby lovelove » 07 Aug 2011 05:48

I would also be incredibly thankful if you would be inclined to consider supporting this feature. Exporting the first frame of every new scene (i.e. upon scene change detection) as an image file, would be an enormous help in identifying added and deleted scenes when comparing 2 videos. (If Motion Detection and Scene Change Detection are considered two differnent things for the purpose of this thread, then please split it.)

Jean-Baptiste, if I understand correctly, this is already implemented?
There is already one, by default in VLC.
So how can the VLC user interact with this motion / scene change detector you refer to in order to achieve the task mentioned above?

If not already implemented, as a feature request I would suggest the following:
in preferences > video > output modules > scene filter add a checkbox entitled "only on scene changes"

PS: two videos to show techniques of scene change detection (although the input video material is not "classical" in the sense that they rather consist of a long tracking shot, instead of classical cinema movie with clear scene cuts, but as they are still interesting to watch, here we go: )

http://www.youtube.com/watch?v=4988BhKUa9Q&NR=1
http://www.youtube.com/watch?v=4esP2nO1_kY
Last edited by lovelove on 07 Aug 2011 16:24, edited 2 times in total.

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Re: Motion-Detection Filter for VLC?

Postby lovelove » 07 Aug 2011 06:31


lovelove
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Re: Motion-Detection Filter for VLC?

Postby lovelove » 07 Sep 2011 07:22

There is already one, by default in VLC.
where is it?
how can I use it?

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Re: Motion-Detection Filter for VLC?

Postby ivoire » 07 Sep 2011 11:21

modules/video_filter/motiondetect.c
To use it, just select the modtion detection filter in the list of available video filters.

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Re: Motion-Detection Filter for VLC?

Postby lovelove » 07 Sep 2011 19:39

thank you. are you talking about tools > effects and filters > video effects > image modification > motion detect ?

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Re: Motion-Detection Filter for VLC?

Postby VLC_help » 08 Sep 2011 16:12

Yes, or via command-line

Code: Select all

vlc --video-filter=motion

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Re: Motion-Detection Filter for VLC?

Postby steve333 » 21 Dec 2011 18:54

I am recording output from a security camera.

I would like to only record the frames where motion is detected to reduce the amount of stored data.

I enabled the "motion detect" video effect filer.
But this just seems to add square boxes to the video where it thinks it has detected motion.

In my case (night time scene) it seems to detect picture noise as motion.
Conversely it ignores all the real large-scale motion in my video stream (maybe due to low frame rate?).

Clearly there must be some parameters which apply to the algorithm, such as noise-level (threshold to ignore), integration (of static objects), difference threshold (level or number of changed pixels to detect).

Is it possible to adjust these parameters to suit my video source?

Is it possible to only record the frames where motion is detected (either on the live video or as a post-processing transcode operation)?

Jean-Baptiste Kempf
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Re: Motion-Detection Filter for VLC?

Postby Jean-Baptiste Kempf » 21 Dec 2011 19:12

Not in VLC, so far.
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Re: Motion-Detection Filter for VLC?

Postby zozizozu » 12 May 2012 13:13

Hi, for this i use "vlc --video-filter=motiondetect -vvv > modec 2>&1" to redirect full vlc log to a file.
Then i use something like while thrue : tail -n 1 modec | grep 'moving shapes' , to get only the last line of the output of the motiondetect module.
If the last line is not equal than the line before, then something have move, so you can start the grabbing .

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Re: Motion-Detection Filter for VLC?

Postby natma » 17 May 2017 16:02

the answer from zozizozu is it also applicable in Windows? I've tried to use it, but the second part didn't work.

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Re: Motion-Detection Filter for VLC?

Postby zozizozu » 17 May 2017 17:07

Hi. I'm sorry, it will not work on windows except if you install GNU executables tail and grep , you can use mingwin for example.
I've modified the code of this module so it can resend datas to UDP, but it seams videolan's developpers not want that : https://mailman.videolan.org/pipermail/ ... 11433.html
You can ask for this new feature on https://forum.videolan.org/viewforum.php?f=7 , or compile VLC by yourself using my modified code : https://guest:nopw@trac.ddrdev.fr/utils ... ondetect.c

Regards

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Re: Motion-Detection Filter for VLC?

Postby aqk » 03 Sep 2017 23:18

Don't forget that Windows-10 also supports Linux commands now, through its Ubuntu subset.

Just open a command prompt and enter: bash

For further reading see https://www.howtogeek.com/249966/how-to ... indows-10/


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