月份:十一月 2008

Goto Jpeg

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Chroma Subsampling YUV subsampling
1×1 4:4:4
1×2
2×1 4:2:2
2×2 4:2:0

YUV subsampling 4:2:2, 4:2:0 當中又有不同的取法。比chroma-subsamplingf 複雜。
Reference: impulseadventure

hack iPhone applicaion ipa

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ipa is an zipped file. contains:

  • “iTunesArtwork"
  • which is the artwork show in iTunes, if you follow ad hoc method to install your software to iPhone/iPod Touch, store a 512×512 jpeg file with the name iTunesArtwork, no extension, in your project’s Resource group.

  • “iTunesMetadata.plist"
  • which is the metadata of application show in iTunes.

    reference:
    http://hackint0sh.org/forum/showthread.php?p=343126
    continued…

    iPhone application icon in iTunes

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  • create a 512×512 JPEG image named ‘iTunesArtwork’ without any file extension.
  • Put it in your project Resources folder.