yoya/io_isobmff

ISOBMFF parser & builder (for HEIF & AVIF)

IO_ISOBMFF

ISOBMFF binary perser dumper, converter, powered by PHP. bidirectional converter with ISOBMFF

install

% composer require yoya/io_isobmff

require

• IO_Bit
• https://github.com/yoya/IO_Bit
• IO_ICC
• https://github.com/yoya/IO_ICC

script (sample/*.php)

• isobmffdump.php

% php vendor/yoya/io_isobmff/sample/isobmffdump.php -f input.heic
type:ftyp(offset:0 len:24):File Type and Compatibility
  major:mif1 minor:0  alt:mif1, heic
type:mdat(offset:24 len:139682):Media Data
  _mdatId:557184717
  _offsetRelative:8
  _itemID:1
type:meta(offset:139706 len:328):Information about items
  version:0 flags:0
    type:hdlr(offset:139718 len:53):Handler reference
      version:0 flags:0
      componentType:
      componentSubType:pict
(omit...)

• isobmfftree.php

% php vendor/yoya/io_isobmff/sample/isobmfftree.php -f input.heic
Props:
[1]: colr subtype:prof
[2]: hvcC profile:3 level:90 chroma:1
[3]: ispe width:512 height:512
(omit...)
Items:
[1]: dimg from:49 type:hvc1 method:0 ref:0 offset:28986 length:13529
[2]: dimg from:49 type:hvc1 method:0 ref:0 offset:42515 length:20507
(omit...)
[48]: dimg from:49 type:hvc1 method:0 ref:0 offset:804455 length:14580
[49]: pitm type:grid method:1 ref:0 offset:0 length:8
[50]: thmb from:49 type:hvc1 method:0 ref:0 offset:3995 length:22809
[51]: cdsc from:49 type:Exif method:0 ref:0 offset:26804 length:2182

derived classes

• https://github.com/yoya/IO_HEIF
• https://github.com/yoya/IO_AVIF