v4l2rc MJPEG to Videomixer slow - alternative pathways?

[Ashwath Rajan]

Hi, thank you so much for the response.

What do you mean by "make sure to add downstream caps?"

Another piece of info I learned: I'm getting a TON of jpeg decode errors,
but only with a very specific camera module, that can output up to 1280x720
pixel resolution.  If I use cameras that only run at max 640x480
resolution, they get no decode errors.  Is there something I can do that
may be specific to the decode errors in this camera?

Thank you!

On Thu, Sep 28, 2017 at 6:30 PM Nicolas Dufresne <nicolas at ndufresne.ca>
wrote:

> Le jeudi 28 septembre 2017 à 16:45 -0700, ashwath a écrit :
> > I'm sorry, just 1 more update.  Adding a leaky queue after the
> > capture helped
> > get rid of the lost frames problem, but the feed is still quite laggy
> > (not
> > to mention I'm also losing lots of frames).  I see a lot of gstreamer
> > warnings:
> >
> >
> > 0:00:06.013149788 15050       0x9250a0 WARN            videodecoder
> > gstvideodecoder.c:4003:_gst_video_decoder_error:<jpegdec2> error:
> > Failed to
> > decode JPEG image
> > 0:00:06.013162819 15050       0x9250a0 WARN            videodecoder
> > gstvideodecoder.c:4005:_gst_video_decoder_error:<jpegdec2> error:
> > Decode
> > error #62: Unsupported JPEG process: SOF type 0xcf
> >
> >
> > new pipeline:
> >
> >  gst-launch-1.0 videomixer name=mix sink_0::xpos=0 sink_0::ypos=0
>
> Replace with videomixer with compositor, and configure latency property
> to something large enough (experiment to find the good value for your
> use case). The leaky queues won't be required anymore since compositor
> has it's own queue mechanism. Make sure so add downstream caps,
> compositor will produce a perfect framerate from the detected framerate
> in that filter.
>
> > sink_1::xpos=640 sink_1::ypos=0 sink_2::xpos=0 sink_2::ypos=480
> > sink_3::xpos=640 sink_3::ypos=480  ! autovideosink sync=false v4l2src
> > device=/dev/video0 do-timestamp=false !
> > image/jpeg,height=480,width=640,framerate=30/1 ! queue leaky=2
> > max-size-buffers=1 !  jpegparse ! jpegdec ! videoconvert ! mix.sink_0
> > v4l2src device=/dev/video1 do-timestamp=false !
> > image/jpeg,height=480,width=640,framerate=30/1 ! queue leaky=2
> > max-size-buffers=1 !  jpegparse ! jpegdec ! videoconvert ! mix.sink_1
> > v4l2src device=/dev/video2 do-timestamp=false !
> > image/jpeg,height=480,width=640,framerate=30/1 ! queue leaky=2
> > max-size-buffers=1 !  jpegparse ! jpegdec ! videoconvert ! mix.sink_2
> > v4l2src device=/dev/video3 do-timestamp=false !
> > image/jpeg,height=480,width=640,framerate=30/1 ! queue leaky=2
> > max-size-buffers=1 ! jpegparse ! jpegdec !  videoconvert ! mix.sink_3
> >
> >
> >
> >
> > --
> > Sent from: http://gstreamer-devel.966125.n4.nabble.com/
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20170929/e490542c/attachment.html>