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 .m4a, .m4v and .mov files.

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

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

--list
     list all covr-boxes.

          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

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

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

--remove
     remove covr-box.

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

     Example, add PNG image file:

          mp4art --add ACDC.png mysong.m4a

     Example, extract image files from file:

          mp4art --extract mysong.m4a