IP and USB camera synchronization

[Dimitrios Katsaros]

You will need to share a network clock across the different devices. These
links can get you started:

https://noraisin.net/diary/?p=954
https://cgit.freedesktop.org/gstreamer/gst-rtsp-server/tree/examples

Are you intending on transmitting the media to a common device to do the
correlation? you will need to use a good network transmission format.
rtpbin help you with that or matroska via tcp. Also, make sure you add a
healthy amount of latency to your receiver app to ensure that there is a
window to synchronize the media. It should roughly be more than the biggest
latency amongst all the connections.

Dimitrios

On Mon, Jan 23, 2017 at 3:49 PM, Toni Matsablokos <tonimatsablokos at gmail.com
> wrote:

> Hi all,
>
> I am currently working on a project where I want to synchronize two
> cameras. The first one is an ip camera and the other is a usb webcam. For
> example using gst-launch I can see their streams with
>
> 1) gst-launch-1.0 -v souphttpsrc location=camera_uri ! jpegdec !
> autovideoconvert ! autovideosink
>
> 2) gst-launch-1.0 v4l2src device=/dev/video0  !  videoparse
> format=GST_VIDEO_FORMAT_GRAY16_LE width=640 height=480 ! autovideoconvert
> ! autovideosink
>
> my question is if I can somehow synchronize these cameras. In particular,
> my goal is  to find for each frame in the first camera, the frame in the
> second one that is most close in time.
> In case synchronization is feasible, any hints/tips on how to proceed
> would be most helpful.
>
> many thanks,
> Toni
>
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>
>
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