[Samtools-help] QS field?

[Adam W. <aw...@sg...>]

Hi,

I recently ran samtools mpileup from a Makefile and some extra fields
appeared, the QS and RPB fields. e.g:

samtools mpileup -gf ref.fa seq.bam | bcftools view -cg - > all.vcf

NC_000962       233     .       T       .       81      .
DP=17;QS=1.000000,0.000000,0.000000,0.000000;AF1=0;AC1=0;DP4=10,7,0,0;MQ=60;FQ=-78
     PL      0
NC_000962       234     .       G       .       45      .
DP=16;QS=0.942609,0.057391,0.000000,0.000000;RPB=-1.518513e+00;AF1=0;AC1=0;DP4=9,6,0,1;MQ=60;FQ=-42;PV4=0.44,0.2,1,0.09
PL      0

When I run this makefile on another machine those fields aren't there.
Any ideas what is making these fields appear? and also what does QS
mean? I can't seem to find it in the manual.

[Samtools Version: 0.1.18 (r982:295); bcftools 0.1.17-dev (r973:277)]

Thanks for any help

Adam