---
name: "bam12split"
section: "1"
platform: "linux"
package: "biobambam2"
version: "2.0.185+ds-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/bam12split"
---

# bam12split(1)

project rank pairs produced by bamcollate2 to single ranks per read

## NAME

bam12split - project rank pairs produced by bamcollate2 to single ranks per read

## SYNOPSIS

**bam12split** \[options\]

## DESCRIPTION

bam12split reads a BAM file from standard input, projects rank pairs produced by bamcollate2 to single ranks per read and writes the resulting data as a BAM file.

When the name A\_B\_C was produced for a pair a reads by

bamcollate2 collate=2

then bam12split produces the name A\_C for the first read of the pair and B\_C for the second read of the pair.

The following key=value pairs can be given:

**level=\<-1\|0\|1\|9\|11\>:** set compression level of the output BAM file. Valid values are

- \-1:

  zlib/gzip default compression level

- 0:

  uncompressed

- 1:

  zlib/gzip level 1 (fast) compression

- 9:

  zlib/gzip level 9 (best) compression

If libmaus has been compiled with support for igzip (see https://software.intel.com/en-us/articles/igzip-a-high-performance-deflate-compressor-with-optimizations-for-genomic-data) then an additional valid value is

- 11:

  igzip compression

**verbose=\<1\>:** Valid values are

- 1:

  print progress report on standard error

- 0:

  do not print progress report

**tmpfile=\<filename\>:** prefix for temporary files. By default the temporary files are created in the current directory

**md5=\<0\|1\>:** md5 checksum creation for output file. Valid values are

- 0:

  do not compute checksum. This is the default.

- 1:

  compute checksum. If the md5filename key is set, then the checksum is written to the given file. If md5filename is unset, then no checksum will be computed.

**md5filename** file name for md5 checksum if md5=1.

**index=\<0\|1\>:** compute BAM index for output file. Valid values are

- 0:

  do not compute BAM index. This is the default.

- 1:

  compute BAM index. If the indexfilename key is set, then the BAM index is written to the given file. If indexfilename is unset, then no BAM index will be computed.

**indexfilename** file name for BAM index if index=1.

## AUTHOR

Written by German Tischler.

## REPORTING BUGS

Report bugs to \<germant@miltenyibiotec.de\>

## COPYRIGHT

Copyright © 2009-2013 German Tischler, © 2011-2013 Genome Research Limited. License GPLv3+: GNU GPL version 3 \<http://gnu.org/licenses/gpl.html\>\
 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.