Stream Synchronized Webcams

[Vivia Nikolaidou]

Hi,

You should use compositor instead of videomixer. compositor will make
sure that the two sources are in sync.

You should also try removing the do-timestamp=true from the sources.
If they do timestamping correctly, it shouldn't be needed.

Best regards,

Vivia

On 8 November 2016 at 08:47, Eric-Stone <somedude114 at gmail.com> wrote:
> Hi,
>
> I'm trying to stream two synchronized side-by-side webcams compressed in
> h264 over the network. Right now, I have the output saved to a file (because
> it simplifies testing) using the command:
>
> gst-launch-1.0 \
>         v4l2src device=/dev/video0 do-timestamp=true ! \
>         image/jpeg, width=$WIDTH, height=$HEIGHT, framerate=$FPS/1 ! \
>         jpegparse ! jpegdec ! \
>         videorate ! \
>         alpha alpha=1.0 ! \
>         videobox border-alpha=0 left=-$WIDTH ! \
>         videomixer name=mix ! \
>         videoconvert ! \
>         queue ! \
>         queue ! omxh264enc ! matroskamux ! filesink location=output/out.mkv  \
>         $v4l2src device=/dev/video1 do-timestamp=true ! \
>         image/jpeg, width=$WIDTH, height=$HEIGHT, framerate=$FPS/1 ! \
>         jpegparse ! jpegdec ! \
>         videorate ! \
>         queue ! \
>         mix.
>
> This works, but unfortunately the two views are out of sync. I imagine that
> I need to add "sync=true" to some element before the encoder, but I'm unsure
> as where that should go. Does anyone have any suggestions on how to
> synchronize these two inputs?
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Stream-Synchronized-Webcams-tp4680531.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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