Pulling out “alts” from a multisample vcf by sample ID

Dear Biostars,

I have a multisample vcf. I would like a to turn this into a per sample “alts” file as below.

The desired outcome would be :

chr10:12342:A:T  SAMPLEID1:0/1 SAMPLEID2:1/1 ...
chr10:432234:G:C SAMPLEID4:0/1 SAMPLEID7:1/1 ...

I have tried :

bcftools query -f "%CHROM:%POS:%REF:%ALTn[%SAMPLE:%GTt]'  i- 'GT="alt"' input.vcf 

which gives me:

chr10:12342:A:T  SAMPLEID1:0/1 SAMPLEID2:1/1 chr10:432234:G:C 
SAMPLEID4:0/1 SAMPLEID7:1/1 ...

or

 bcftools query -f "%CHROM:%POS:%REF:%ALTt[%SAMPLE:%GTn']  i- 'GT="alt"' input.vcf 


chr10:12342:A:T  SAMPLEID1:0/1 
SAMPLEID2:1/1 
chr10:432234:G:C SAMPLEID4:0/1 
SAMPLEID7:1/1 

or

  bcftools query -f "%CHROM:%POS:%REF:%ALTt[%SAMPLE:%GTt']  i- 'GT="alt"' input.vcf 

  chr10:12342:A:T  SAMPLEID1:0/1 SAMPLEID2:1/1 chr10:432234:G:C SAMPLEID4:0/1 SAMPLEID7:1/1 

I can’t quite get my head around the correct syntax and sure there is an easy fix! Your help would be much appreciated.

All the best