@chapter mp4art
This tool is used to manage iTunes Metadata Cover-art which is typically used to embed an image to a song file. For example, the songs in an album collection might all contain an image of the album cover art. This data is usually found in @samp{.m4a}, @samp{.m4v} and @samp{.mov} files.

@table @samp
@item --art-any
act on all covr-boxes (default).
Specifies the scope of the action to operate on all, if applicable, covr-boxes.

@item --art-index IDX
act on covr-box index IDX.
Specifies the scope of the action to operate on single covr-box INDEX.
@end table

@table @samp
@item --list
list all covr-boxes.
Example output:

@example
IDX     BYTES  CRC32     TYPE       FILE
----------------------------------------------------------------------
  0    173613  710a3ec9  JPEG       01 Life In Technicolor.m4a
  0    173613  710a3ec9  JPEG       02 Cemeteries Of London.m4a
  0    173613  710a3ec9  JPEG       03 Lost!.m4a
  0    173613  710a3ec9  JPEG       04 42.m4a
  0    173613  710a3ec9  JPEG       05 Lovers In Japan _ Reign Of Love.m4a
  0    173613  710a3ec9  JPEG       06 Yes.m4a
  0    173613  710a3ec9  JPEG       07 Viva La Vida.m4a
  0    173613  710a3ec9  JPEG       08 Violet Hill.m4a
  0    173613  710a3ec9  JPEG       09 Strawberry Swing.m4a
  0    173613  710a3ec9  JPEG       10 Death And All His Friends.m4a
@end example

@item --add IMG
add covr-box from IMG file.

@item --replace IMG
replace covr-box with IMG file.

@item --remove
remove covr-box.

@item --extract
extract covr-box.
This will extract all covr-box data to image files in the format of @samp{BASENAME.art[INDEX].TYPE} .

Example, add PNG image file:
@example
mp4art --add ACDC.png mysong.m4a
@end example

Example, extract image files from file:
@example
mp4art --extract mysong.m4a
@end example

@end table
