Diff of IO_HEIF

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[[IO_Bit]] > [[IO_HEIF]] | [[HEIF]]/[[HEVC]] 

- https://github.com/yoya/IO_HEIF
- https://packagist.org/packages/yoya/io_heif

* require [#b2b71717]

- [[IO_Bit]]
- [[IO_ISOBMFF]]
- [[IO_HEVC]]
- [[IO_ICC]]

* usage [#f6334809]

- dump as text
 % composer require yoya/io_heif
 % php vendor/yoya/io_heif/sample/heifdump.php -f test.heic

** HEVC [#u4ed9b9c]

- JPEG =(ffmpeg + x265)=> HEVC =(IO_HEIF)=> HEIF(.heic) 
 % ffmpeg -i test.jpg -loglevel warning  -pix_fmt yuv420p -vcodec libx265 -f hevc \
                 -x265-params log-level=1 -crf 12 -preset slower test.hevc
 % php vendor/yoya/io_heif/sample/heiffromhevc.php  -f test.hevc > test.heic

* 関連 [#rel]

- [[FFmpeg]]
- [[x265]]