I’ve tried this command can work:
gst-launch-1.0 uridecodebin uri='file:///opt/nvidia/deepstream/deepstream-5.1/samples/streams/sample_1080p_h264.mp4' ! nvvideoconvert ! videobalance saturation=1.5 ! nvvideoconvert ! 'video/x-raw(memory:NVMM), format=I420' ! nvv4l2h264enc bitrate=2000000 ! h264parse ! flvmux latency=200 ! rtmpsink location='rtmp:// 13.xxx.xxx.xx'