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MattsProjects / pylon_gstreamer

A robust integration of Basler's Pylon API with GStreamer. Delivers applications as ready-to-run standalone compiled executables (gst-launch-1.0 is not needed). Designed for reliability and easy access to performance optimizations. Note: This is not a plugin. It is an intergration using GStreamer's GstAppSrc element.
Apache License 2.0
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how to forward gstreamer feed with v4l2videosink #7

Closed tameralamiri closed 4 years ago

tameralamiri commented 6 years ago

demopylongstreamer is working well with autovideosink. However, when i try to use v4l2videosink it crashes with internal data flow error. is there anyway to fix that? my main goal is to open the basler camera as a webcam from a browser so i need to include v4l2videosink device=/dev/vedio0 to gstreamer command

i already downloaded v4l2loopback-utils and ran sudo modprobe v4l2loopback exclusive_caps=1 with no success

tameralamiri commented 6 years ago

this is the full command i'm using: sudo ./demopylongstreamer -parse "gst-launch-1.0 fdsrc ! decodebin3 name=dec ! queue ! videoflip method=vertical-flip ! v4l2sink device=/dev/video0" &> debug.log

and here is the logs:

Press CTRL+C at any time to quit. Initializing camera and driver... Using Camera : Basler acA1920-40uc (22642081) Camera Area Of Interest : 1920x1200 Camera Speed : 40.9987 fps Applying this Pipeline to the CInstantCameraAppsc: gst-launch-1.0 fdsrc ! decodebin3 name=dec ! queue ! videoflip method=vertical-flip ! v4l2sink device=/dev/video0... Pipeline Made. Starting Camera image acquistion and Pylon driver Grab Engine... Starting pipeline... ERROR from element source22642081: Internal data stream error. Debugging info: gstbasesrc.c(2950): gst_base_src_loop (): /GstPipeline:pipeline/GstBin:sourcebin22642081/GstAppSrc:source22642081: streaming stopped, reason not-negotiated (-4) Stopping pipeline... Sending EOS event... Stopping Camera image acquistion and Pylon image grabbing...

Press Enter to exit.

MattsProjects commented 6 years ago

Hi Tamer, Try this pipeline: sudo ./demopylongstreamer -parse "gst-launch-1.0 ! deinterlace ! v4l2sink device=/dev/video0"

I found the hint from the gstreamer mailing lists. Using deinterlace element works for me... https://lists.freedesktop.org/archives/gstreamer-devel/2013-September/043136.html