Gradual increase usage ram of jetson nano when doing decoding

Hi guys,
I doing decoding multi-stream decoding using H264 hardware decoder with jetson nano,
I use gstream 1.14.5 + opencv 3.4.6 builded from source and jetpack 4.2.2.
I use python multi-thread for multi-stream decoding.

gst_str = ('rtspsrc location=[rtsp] latency=300 ! ’
'rtph264depay ! h264parse ! omxh264dec enable-low-outbuffer=1 ! ’
'nvvidconv ! ’
‘video/x-raw , format=(string)BGRx !’
'videoconvert ! ’
'appsink ')
cv2.VideoCapture(gst_str, cv2.CAP_GSTREAMER)

My problem is that the ram gradually increase during decode. why?

Please try nvv4l2decoder. We are deprecating omx plugins. Please try v4l2 plugins.