Internal Data Stream Error Occurs When Adding Two Caps Filters with Different Resolutions in Webcam GStreamer Pipeline Using Tee

[Sulthan Amanu]

Hi Team,

I have encountered an issue while
creating a GStreamer pipeline with a webcam source and two caps filters
using the tee element. The pipeline is designed to apply different
resolutions to the video stream. Below is an example of the pipeline:

gst-launch-1.0 -e v4l2src device=/dev/video0 ! \
    tee name=t ! \
        queue ! \
        videoconvert ! \
        capsfilter caps="video/x-raw, width=640, height=480" ! \
        autovideosink t. ! \
        queue ! \
        videoconvert ! \
        capsfilter caps="video/x-raw, width=1280, height=720" ! \
        autovideosink


However, when executing the pipeline, I encountered the following error
message:

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal
data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop ():
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
EOS on shutdown enabled -- waiting for EOS after Error
Waiting for EOS...


I kindly request your assistance in resolving this issue and achieving the
desired behavior without utilizing the *videoscale , videoconvertscale,
other frame resize element. And I need to orignal data of both resolution.*

Issue link -
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2808#note_1999618

Regards,
Sulthan
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