ZoneMinder Forums

Posted: **Tue Sep 30, 2014 2:51 pm**

I just installed ZM 1.26.5 running on Ubuntu and my first test with a Logitech HD720p webcam works fine. I am wondering if ZM can work from a file saved on disc, instead of a live stream. That is, if I tell ZM the frame rate and the start time of the file, can it go through and do motion-detection on it?

I have a Raspberry Pi which has a good quality 5Mpix camera. I have a program that saves two files simultaneously (high-res H264 format and low-res MJPEG format) but I don't know how to stream the MJPEG in that mode. There is mjpeg-streamer to make it like a basic webcam but I want to keep the high-res file also, so I can get the full detail from a given frame.

if anyone's curious, here is the program that saves two resolutions at once. for 1 hour:

Code: Select all

#!/usr/bin/python
# Python program for Raspberry Pi using picamera library
    import picamera

    with picamera.PiCamera() as camera:
        camera.resolution = (1920, 1080)
        camera.framerate = 8
        camera.annotate_background = True # black rectangle behind white text for readibility
        camera.annotate_frame_num = True # set 'True' if we should show the frame number on the video
        camera.start_recording('highres.h264')
        camera.start_recording('lowres.mjpeg', splitter_port=2, format='mjpeg', resize=(256, 144))
        camera.wait_recording(3600)
        camera.stop_recording(splitter_port=2)
        camera.stop_recording()

Posted: **Thu Oct 02, 2014 1:16 pm**

Do you need to save the stream zoneminder uses? Zoneminder can use File as a source, but from what I understand the file must be a JPEG and not a video.

If you can make it save one frame at a time as JPEG instead of the MJPEG stream you should be set.

Posted: **Thu Oct 02, 2014 6:00 pm**

Nerre wrote:Zoneminder can use File as a source, but from what I understand the file must be a JPEG and not a video.

Untrue, at least in 1.25 -- I used a many-minute example video from my cameras as input to fine-tune the motion detection, running the same video through over and over until it was reliably detecting stuff (and ignoring little things). The video had a hand-selected set of "events" that should have been picked up, for test purposes.

According to my notes, a raw "MJPEG" file returned from the camera (at 5FPS, 640x480) was dumped into a temp file, then

Set up a camera called "FileTest" with Source type: FFMPEG and FPS "5/5" to control rate to match camera (or 25/25 to test at faster than real time). When camera is set to "monitor" or "modetect", input file is processed as events. Return camera to mode "none" to reset.

ZoneMinder Forums

can ZM work from a saved file, not a stream?

can ZM work from a saved file, not a stream?

Re: can ZM work from a saved file, not a stream?

Re: can ZM work from a saved file, not a stream?