Gstreamer audio mixer issue

[dananjaya]

Hi,
I am trying the below pipeline to capture 2 1080p usb video streams while
previewing, with 2 usb audio sources mixed together. 

The issue is, the audio mixed and captured is containing lots of artifacts
such as click sounds. How can I resolve this issue.

gst-launch-1.0 -e mp4mux name=mux ! filesink location=feed1mp1080HS.mp4
v4l2src device=/dev/video1 ! tee name=t1 t1. ! queue ! video/x-raw,
width=1920, height=1080, framerate=30/1 ! nvvidconv ! queue ! nvv4l2h264enc
maxperf-enable=1 bitrate=4000000 profile=4 ! queue ! h264parse ! queue !
mux.video_0 audiomixer name=mixer ! audioconvert ! voaacenc ! aacparse !
mux.audio_0 pulsesrc
device="alsa_input.usb-VXIS_Inc_ezcap_U3_capture-02.analog-stereo" ! queue !
audio/x-raw,width=16,depth=16,rate=44100,channel=1 ! queue ! mixer.sink_0
pulsesrc
device="alsa_input.usb-C-Media_Electronics_Inc._USB_Advanced_Audio_Device-00.analog-stereo"
! queue ! audio/x-raw,width=16,depth=16,rate=44100,channel=1 ! queue !
mixer.sink_1 t1. ! queue ! video/x-raw, width=1920, height=1080,
framerate=30/1 !  nvvidconv ! queue !
"video/x-raw(memory:NVMM),width=959,height=540,framerate=30/1,format=NV12" !
queue ! nvoverlaysink overlay-x=0 overlay-y=270 overlay-w=959 overlay-h=540
overlay=1 v4l2src device=/dev/video2 ! tee name=t2 t2. ! queue !
video/x-raw, width=1920, height=1080, framerate=30/1 ! nvvidconv ! queue !
nvv4l2h264enc maxperf-enable=1 bitrate=4000000 profile=4 ! queue ! h264parse
! queue ! mp4mux ! filesink location=feed2mp1080HS.mp4 t2. ! queue !
video/x-raw, width=1920, height=1080, framerate=30/1 ! nvvidconv ! queue !
"video/x-raw(memory:NVMM),width=960,height=540,framerate=30/1,format=NV12" !
queue ! nvoverlaysink overlay-x=960 overlay-y=270 overlay-w=960
overlay-h=540 overlay=2

Thanks in advance



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