Describe the bug
I am trying to replay a PCAP at a slower speed and it does not seem to work. The execution time of the command is constant unless the multiplier command-line option is greater than 1.0.

To Reproduce
tcpreplay --intf1=eth0 --multiplier=0.5 myCapFile.pcap

Expected behavior
I expect that the time for the PCAP to play to double based on my multiplier.

System (please complete the following information):

• OS: Ubuntu
• OS version: 18.04
• Tcpreplay Version: 4.3.4

Additional context
It does seem to use the multiplier option only if I loop the data. The first loop runs at normal speed and the subsequent loops are at the reduced speed.