eegdash.io.fif module

Read the complete part of a FIF file whose last data buffer runs past the end of the file.

MNE opens such a file (read_raw_fif scans the tags when the directory at the end is missing, with the warning “FIF tag directory missing at the end of the file … possibly corrupted file”) and counts every buffer it found, including the cut one. Reading that buffer then fails (cannot reshape array of size ... or buffer size must be a multiple of element size), so the recording was refused. Seen in deposits where the stored object itself is short (sizes equal OpenNeuro’s and the NEMAR annex key’s): on004012 sub-19 stim04 and sub-22 stim02, on004346 sub-01 run-01, each losing its last 1 s.

Only MNE’s public API is used: get_data to find the last sample that reads, and Raw.crop to drop the rest. Nothing is padded or made up; the recording comes back shorter than its header says, with a warning that gives the loss.

eegdash.io.fif.crop_unreadable_tail(raw)

Crop a FIF raw (preload=False) to the samples it can read.

Returns the cropped raw, or None when raw is not a FIF file, when its first sample does not read either, or when its last sample reads (nothing to do here: the failure is elsewhere).