ISODUMP linux command manual

isodump(5)                     Linux IEEE 1394                     isodump(5)

       isodump - format of IEEE 1394 isochronous packets dump file

       The  isodump  format  stores  a series of IEEE 1394 isochronous stream
       packets (possibly from multiple channels),  including  their  headers.
       Its  main use is as the output format of dumpiso(1) and the input for-
       mat of sendiso(1).

       The 32 byte header starts at offset 0 with the  string  "1394  isodump
       v1"  followed  by  a  zero  byte.   The next 8 bytes form a 64 bit big
       endian integer, which represents a bit mask of the channels that  were
       dumped.   A  set bit at position (1 << x) signifies that channel x was
       being listened on.  The following 8 bytes are set to zero.

       The iso packets follow the header and are appended to the data  stream
       in  the  order  they were received.  The packets consist of the header
       quadlet  as  originally  received  and  the  data  quadlets  following
       directly.   The  CRC  quadlets after header and data do not appear and
       everything is in big endian, as seen on the bus.

       There is no further framing of  the  packets  in  the  format,  packet
       boundaries  can  be  found  by  looking  at the data size field in the
       header quadlet of each packet.  The data size  field  appears  in  the
       most  significant  16  bits of the header quadlet, contain the size in
       bytes (the actual packet is padded to a multiple of four bytes) and do
       not include the header packet.

       This  format  was  introduced  with  the  iso send and dump tools dis-
       tributed with libraw1394.  No one else uses it so far.

       sendiso(1), dumpiso(1)

       Andreas Bombe 

libraw1394 1.0.0                  isodump v1                       isodump(5)