Add new sink to gstreamer examples camera

Question

I'm very newbie at GStreamer and I can't write the output to file.

I'm testing the gstreamer detect example in the coral/examples-camera/gstreamer project. This demo run perfectly in my coral dev board mini, but I need help to add a filesink in the gstreamer pipeline of this proyect

            PIPELINE += """ ! decodebin ! queue ! v4l2convert ! {scale_caps} !
              glupload ! glcolorconvert ! video/x-raw(memory:GLMemory),format=RGBA !
              tee name=t
                t. ! queue ! glfilterbin filter=glbox name=glbox ! queue ! {sink_caps} ! {sink_element}
                t. ! queue ! glsvgoverlay name=gloverlay sync=false ! glimagesink fullscreen=true
                     qos=false sync=false
            """

The demo uses the glimagesink element to display the video on the screen and I need to add a sink that saves the video to a file

Executing with debug I've captured, I belive, the format of video in glimagesink element, the debug output is:

GST_PADS gstpad.c:3160:gst_pad_query_accept_caps_default:<salida:sink>[00m allowed caps subset ANY, caps video/x-raw(memory:GLMemory), framerate=(fraction)30/1, interlace-mode=(string)progressive, width=(int)640, height=(int)480, format=(string)RGBA, texture-target=(string)2D

I've tried this pipelines configurations:

oral board model: mt8167
Gstreamer pipeline:
 v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=30/1 ! decodebin ! queue ! v4l2convert ! video/x-raw,format=BGRA,width=640,height=480 !
              glupload ! glcolorconvert ! video/x-raw(memory:GLMemory),format=RGBA !
              tee name=t
                t. ! queue ! glfilterbin filter=glbox name=glbox ! queue ! video/x-raw,format=RGB,width=320,height=320 ! appsink name=appsink emit-signals=true max-buffers=1 drop=true
                t. ! queue ! glsvgoverlay name=gloverlay sync=false ! 
                videoconvert ! x264enc ! avimux ! filesink location=output.avi
            
            
Traceback (most recent call last):
  File "detect.py", line 138, in <module>
    main()
  File "detect.py", line 135, in main
    videofmt=args.videofmt)
  File "/home/mendel/google-coral/examples-camera/gstreamer/gstreamer.py", line 294, in run_pipeline
    pipeline = GstPipeline(pipeline, user_function, src_size)
  File "/home/mendel/google-coral/examples-camera/gstreamer/gstreamer.py", line 36, in __init__
    self.pipeline = Gst.parse_launch(pipeline)
gi.repository.GLib.Error: gst_parse_error: could not link videoconvert0 to x264enc0 (3)

Know anyone how write this output to file with Gstreamer?

Any help will be appreciated