DCF standard

The DCF specification imposes the following conditions.

Limits on directory names

Directories must be created within the main DCIM directory.

Data which is contained within any directory other than the DCIM directory cannot be recognised.

Directory names must consist of three numerals (directory number) followed by five alphanumeric characters. (Example: 100abcde)

The three numerals must make up a number between 100 and 999, and the alphanumeric characters can be taken from the following set of 37 characters: 0123456789abcdefghijklmnopqrstuvwxyz_ (No distinction is made between upper-case and lower-case alphabetic characters. Double-byte characters cannot be used.)

Multiple directories using the same three-digit combination (directory number) cannot be created.

Directory sub-hierarchies are not supported.

File names

File names must consist of four alphanumeric characters followed by four numerals (file number), followed by “.jpg”. (Example: abcd0001.jpg)

The four numerals must make up a number between 0001 and 9999, and the alphanumeric characters can be taken from the following set of 37 characters: 0123456789abcdefghijklmnopqrstuvwxyz_ (No distinction is made between upper-case and lower-case alphabetic characters. Double-byte characters cannot be used.)

Multiple file names using the same four-digit combination (file number) cannot be created.

File format

Only JPEG image files which comply with the Exif 2.1 standard are recognised.

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Panasonic PT-L712NTE manual DCF standard, Limits on directory names, File names, File format