Here is two variants how you can extract udp payload:įastest method, using gstreamer: gst-launch-1.0 -v filesrc location="dump.pcap" ! \ Note that, go over the GUI process for small files is not a problem but big files, it would consume a good time.ģ minutes for 24M, for 500M it would take 1 hours for ASCII parse then another 20 minutes for RAW, so 1:20 to extract TS. Using TShark command tshark.exe -r input.pcap -z follow,udp,raw,0 -w output.ts, produced output file in seconds, but seems to generate a loop on console filling the screen constantly with raw data of the file.įile size is slightly bigger than tcpdump capture, like 200kB.
Produced file cannot be reproduced and fails to be loaded on TS Analyzer Using TShark command tshark -r -Y "udp.stream eq " -w, produced output file in secondsįile size is slightly bigger than tcpdump capture, like 200kB Using Wireshark GUI, follow UDP stream (ASCII), packet read/parse took 3 minutesĬhanged from display and save from ASCII to RAW, packt read/parse took less than 1 minutesįile can be reproduced on VLC and is succefull loaded on TS analyzer At least is not needed to perform the same twice, but it produced the same output as the previous command, also not possible to use on stream analyzer neither VLC. Console window started to show up the bunch of raw data, taking similar time that Gui does. That process is completed in some seconds for the same file that takes one but it produced an output file slightly bigger than the original tcpdump captures what is not expected and is not recognized as TS files by the softwares i have, while the file produced by the long follow the stream process are.Īlso tried the -z follow,UDP,0 instead of -Y udp.stream eq. The proposed solution is: tshark -r -Y "udp.stream eq " -w Since the goal is save the raw udp payload, change from default ascII to raw is needed and once performed, the packet count stats over, needed the same long time to end to finally complete the process After quite some time, when the packet count ends, the option are available to use.
#Wireshark pcap follow udp stream save to raw command line windows
A new popup windows opens and packet count starts while not button or fields are enabled to use, including the mode that is default ASCII. so i think DNS records from time 0.000 to time 2.3056 and DNS records from time 2056.890 to time 2058.032 can not be in same stream (flow).The goal: Extract TS Files captured from UDP streams (multicast)Ĭurrent mode: Choose follow -> UDP stream using Wireshark GUI. Packets from time 0.000 to time 2.3056 and also the packets from time 2056.890 to time 2058.032 are in the same stream (flow)!!!! i think it is not correct because there are a lot of DNS records from time 2.30.890 that this host is transmitted and recieved. is it true? but in wireshark happen this: i think in a flow source addreass, destination address, source port and destination port of packets should be the same and also the time of that packets should be near to each other ( my mean is that those packets should be next to each other in wireshark). but i think the streams that wireshark shows me is incorrect.
by doing this wireshark showing the stream (flow) that this record is in it. i right click on each record and then follow -> udp stream. i want to seperate different flows of DNS from each other.
I have a pcap file that have DNS records.
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