Revision 61648423 libavformat/avformat.h

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libavformat/avformat.h
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/*
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 * Public Metadata API.
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 * The metadata API allows libavformat to export metadata tags to a client
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 * application using a sequence of key/value pairs.
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 * application using a sequence of key/value pairs. Like all strings in FFmpeg,
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 * metadata must be stored as UTF-8 encoded Unicode. Note that metadata
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 * exported by demuxers isn't checked to be valid UTF-8 in most cases.
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 * Important concepts to keep in mind:
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 * 1. Keys are unique; there can never be 2 tags with the same key. This is
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 *    also meant semantically, i.e., a demuxer should not knowingly produce

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