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M4Aの規格に従えば取得できそう PICTチャンクってやつがそれか
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これもし対応すれば、mp4に埋め込まれたアルバムアートも取れるなw
M4Aは"chunk"という塊が連なって構成されています。 ぞれぞれのchunkは8 byteのヘッダを持っています。 その8 byteのうち、最初の4 byteにはchunkの大きさが格納されており、次の4 byteにはchunkの種類が記述してあります。 chunkの種類は事前に定義された指定子を使用し、以下のようなものがあります。 ex) "ftyp", "mdat", "moov", "pnot", "udta", "uuid", "moof", "free", "skip", "jP2", "wide", "load", "ctab", "imap", "matt", "kmat", "clip", "sync", "chap", "tmcd", "scpt", "ssrc", "PICT"
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The text was updated successfully, but these errors were encountered: