usage: h5repack [OPTIONS] file1 file2
  file1                    Input HDF5 File
  file2                    Output HDF5 File
  OPTIONS
   -h, --help              Print a usage message and exit
   -v, --verbose           Verbose mode, print object information
   -V, --version           Print version number and exit
   -n, --native            Use a native HDF5 type when repacking
   -L, --latest            Use latest version of file format
   -c L1, --compact=L1     Maximum number of links in header messages
   -d L2, --indexed=L2     Minimum number of links in the indexed format
   -s S[:F], --ssize=S[:F] Shared object header message minimum size
   -m M, --minimum=M       Do not apply the filter to datasets smaller than M
   -e E, --file=E          Name of file E with the -f and -l options
   -u U, --ublock=U        Name of file U with user block data to be added
   -b B, --block=B         Size of user block to be added
   -M A, --metadata_block_size=A  Metadata block size for H5Pset_meta_block_size
   -t T, --threshold=T     Threshold value for H5Pset_alignment
   -a A, --alignment=A     Alignment value for H5Pset_alignment
   -f FILT, --filter=FILT  Filter type
   -l LAYT, --layout=LAYT  Layout type

    M - is an integer greater than 1, size of dataset in bytes (default is 0) 
    E - is a filename.
    S - is an integer
    U - is a filename.
    T - is an integer
    A - is an integer greater than zero
    B - is the user block size, any value that is 512 or greater and is
        a power of 2 (1024 default)
    F - is the shared object header message type, any of <dspace|dtype|fill|
        pline|attr>. If F is not specified, S applies to all messages

    FILT - is a string with the format:

      <list of objects>:<name of filter>=<filter parameters>

      <list of objects> is a comma separated list of object names, meaning apply
        compression only to those objects. If no names are specified, the filter
        is applied to all objects
      <name of filter> can be:
        GZIP, to apply the HDF5 GZIP filter (GZIP compression)
        SZIP, to apply the HDF5 SZIP filter (SZIP compression)
        SHUF, to apply the HDF5 shuffle filter
        FLET, to apply the HDF5 checksum filter
        NBIT, to apply the HDF5 NBIT filter (NBIT compression)
        SOFF, to apply the HDF5 Scale/Offset filter
        UD,   to apply a user defined filter
        NONE, to remove all filters
      <filter parameters> is optional filter parameter information
        GZIP=<deflation level> from 1-9
        SZIP=<pixels per block,coding> pixels per block is a even number in
            2-32 and coding method is either EC or NN
        SHUF (no parameter)
        FLET (no parameter)
        NBIT (no parameter)
        SOFF=<scale_factor,scale_type> scale_factor is an integer and scale_type
            is either IN or DS
        UD=<filter_number,cd_value_count,value_1[,value_2,...,value_N]>
            required values for filter_number,cd_value_count,value_1
            optional values for value_2 to value_N
        NONE (no parameter)

    LAYT - is a string with the format:

      <list of objects>:<layout type>=<layout parameters>

      <list of objects> is a comma separated list of object names, meaning that
        layout information is supplied for those objects. If no names are
        specified, the layout type is applied to all objects
      <layout type> can be:
        CHUNK, to apply chunking layout
        COMPA, to apply compact layout
        CONTI, to apply contiguous layout
      <layout parameters> is optional layout information
        CHUNK=DIM[xDIM...xDIM], the chunk size of each dimension
        COMPA (no parameter)
        CONTI (no parameter)

Examples of use:

1) h5repack -v -f GZIP=1 file1 file2

   GZIP compression with level 1 to all objects

2) h5repack -v -f dset1:SZIP=8,NN file1 file2

   SZIP compression with 8 pixels per block and NN coding method to object dset1

3) h5repack -v -l dset1,dset2:CHUNK=20x10 -f dset3,dset4,dset5:NONE file1 file2

   Chunked layout, with a layout size of 20x10, to objects dset1 and dset2
   and remove filters to objects dset3, dset4, dset5

4) h5repack -L -c 10 -s 20:dtype file1 file2 

   Using latest file format with maximum compact group size of 10 and
   and minimum shared datatype size of 20

5) h5repack -f SHUF -f GZIP=1 file1 file2 

   Add both filters SHUF and GZIP in this order to all datasets

6) h5repack -f UD=307,1,9 file1 file2 

   Add bzip2 filter to all datasets

