Hi John
try adding --tval-xyz so that it knows you want to write out a surface.
cheers Bruce
On Thu, 8 Dec 2011, John Griffiths wrote:
Dear FS peeps, I am trying to downsample a (white matter) surface with mri_surf2surf. I also want the output in .tri format. First problem is that mri_surf2surf doesn't let me output in .tri format mri_surf2surf --hemi lh --srcsubject subj1 --sval-xyz white --trgsubject subj1 --trgicoorder 4 --trgsurfval subj1_white_downsampled.tri --tfmt tri
gives me ERROR: could not determine type of temp_surf_white.tri
(that happens with the 'tfmt' flag or not) The command does work when the output is a .gii or .mgh file, but when I then try to convert those files to .tri format with mris_convert I get the error ERROR: MRISread: cannot read surface data from file subj1_white_downsampled.gii!
...which is also the error I get when trying to load the file into freeview as a surface. Any idea what I'm doing wrong here? If there is a better way to convert lh.white into a downsampled .tri file please do tell. Thanks very much, john (p.s. thanks to Dan, Doug, and Bruce for getting me to this point...)