Constant rsmpeg::ffi::AVPacketSideDataType_AV_PKT_DATA_METADATA_UPDATE

pub const AVPacketSideDataType_AV_PKT_DATA_METADATA_UPDATE: u32 = 18; // 0x0000_0012u32

A list of zero terminated key/value strings. There is no end marker for the list, so it is required to rely on the side data size to stop. This side data includes updated metadata which appeared in the stream.