Apple Color 1.5 - Manual (Page 76)

Required Image Sequence Filenaming
Here's a sample filename of the first image sequence file that corresponds to the EDL
event shown in
Parsing EDLs for Digital Intermediate Conforms :
fileName_0494794.dpx
The first portion of the filename for each scanned frame (the alpha characters and
underscore) is an ignored but necessary part of the filename. The file's frame number
should equal the (non-dropframe) timecode conversion of that value appearing in the
EDL.
For example, a frame with timecode 05:51:18:28 would have a frame number of 632368.
Numeric extensions must always be padded to seven digits; in this case, you would add
one preceding 0, like this:
fileName_0632368.dpx
The following filename formats are also acceptable:
fileName 0632368.dpx
fileName0632368.dpx
fileName-0632368.dpx
fileName.0632368.dpx
Important: For Color to be able to link to a media file, filenames need at minimum an
alpha-only character name (consisting of at least one upper- or lowercase character),
frame number, and a .dpx or .cin file extension.
76 Chapter 2 Color Correction Workflows