NAME

       pcapreport — Get info about a TS in a pcap

SYNOPSIS

       pcapinfo -h | -help [detail]
       pcapinfo  [-err  stdout]  [-err  stderr] [-verbose | -v] [-name base_name | -n base_name] [-extract | -x]
                [-csvgen | -c] [-output udp_name | -o udp_name] [-max  max_read  |  -m  max_read]  [-data]  [-a]
                [-d  dest_ip[:port]]  [-g  |  -good-ts-only]  [-keep-bad]  [-tfmt time_format] [-dump-data | -D]
                [-extra-dump | -E] [-times | -t] [-skew-discontinuity-threshold  threshold  |  -skew  threshold]
                file

DESCRIPTION

       Report and/or extract the Transport Streams in a .pcap.  In analyse mode ( -a ) the timing info in the TS
       (PCRs) can be compared with the timing info in the pcap.

       -h, -help
               Produce usage summary

       -h detail, -help detail
               Produce usage + more detail on what the output actually means

       -a, -analyse
               Analyse.  Produces summary info on every TS in the pcap

       -d dest_ip[:port], -destip dest_ip[:port]
               Select data with the given destination IP and port.  If the port is not specified, it defaults to
               0 (see below).

       -g, -good-ts-only
               Only  extract/analyse  packets  that  seem  entirely good.  By default there is a bit of slack in
               determining if a packet is good and some dodgy packets are let through.  This switch ensures that
               all packets pass simple testing

       -keep-bad
               Extract all packets including bad ones.  Is implied if an ip & port filter is set.  Overridden by
               --good-ts-only.

       -tfmt time_format
               Sets the format for printed times

               time_format is one of

               90      [Default] show as 90KHz timestamps (suffix 't' on the values: e.g., 4362599t).

               27      Show as 27MHz timestamps (similar, e.g., 25151:000t).

               32      Show as 90KHz timestamps, but only the low 32 bits.

               ms      Show as milliseconds.

               hms     Show as hours/minutes/seconds (H:MM:SS.ssss,  the  H  can  be  more  than  one  digit  if
                       necessary)

       -dump-data, -D
               Dump any data in the input file to stdout.

       -extra-dump, -E
               Dump only data which isn't being sent to the Fl o file.

       -times, -t
               Report continuously on PCR vs PCAP timing for the destination specified in -d.

       -skew-discontinuity-threshold threshold, -skew threshold
               Gives  the  skew discontinuity threshold in 90kHz units.  A value of 0 disables this.  [default =
               6*90000]

       -split-section
               Split extracted streams into multiple files on section (discontinutity) boundaries

       -err stdout
               Write error messages to standard output (the default)

       -err stderr
               Write error messages to standard error (Unix traditional)

       -v, -verbose
               Output extra information about packets

       file    The pcap stream file to get info on

       Specifying 0.0.0.0 for destination IP will capture all hosts, specifying 0 as  a  destination  port  will
       capture all ports on the destination host.

       Network packet numbers start at 1 (like wireshark)

       TS packet numbers start at 0.

   Analyse output
       Times   (packet and PCR) The times associated with packets and PCR are held internally in 90kHz units and
               are displayed in those units by default

       Stream  A  set  of  packets  to  the  same  IP  &  Port.  TS streams are detected by looking for 0x47s at
               appropriate places in the packets

       Section
               A part of a stream which appears to have a continuous TS embedded in it.  If the PCR jumps then a
               new section should be started (though  this  will  not  generate  a  separate  .ts  file  if  the
               extraction  option  is  in  effect unless -split-section is specified, nor will it generate a new
               .csv file.)

               As it stands pcapreport will only report on a single PCR pid within a TS. If multiple  pids  with
               PCRs are detected then this will be reported but the other PCRs will be ignored

       Skew    This  is the difference between the time in the pcap for a UDP packet and any PCR found in the TS
               contained within that packet.  The accuracy of this figure obviously  depends  on  how  good  the
               clock  was in the capture process.  Skew is arbitrarily set to zero at the start of a section.  A
               skew of >6s is assumed to be a discontinuity and will start a new section.

               Positive skew means that we received too low a PCR for this timestamp.

       Drift   This is skew over time and (assuming that the playout process is good) represents the  difference
               in  speed  between the transmitters clock and the receivers clock.  The algorithm for determining
               this isn't very sophisticated so if you have a large maximum jitter or a short sample this should
               be taken with a pinch of salt.  Beware also that PC clocks (like the one in  the  m/c  doing  the
               tcpdump)  are  not always amongst the most stable or accurate; however they should be good enough
               to detect gross errors

       Jitter  This is measured as the difference between the maximum and minimum skews over a 10sec  (max  1024
               samples)  period.   This  should  be long enough to capture a good baseline but short enough that
               drift has a negligible effect

       Max Jitter
               The maximum value of jitter (see above) found in a section

SEE ALSO

       tsinfo(1), tsreport(1) rtp2264(1)

BUGS

       pcapreport can only deal with IPv4.  IPv6 is beyond its current capabilities.

Debian                                          October 28, 2015                                   PCAPREPORT(1)