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some codecs need / can use extradata like Huffman tables. mjpeg: Huffman tables rv10: additional flags mpeg4: global headers (they can be in the bitstream or here) The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid prolems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness.

  • encoding: Set/allocated/freed by libavcodec.
  • decoding: Set/allocated/freed by user.

Definition at line 949 of file avcodec.h.

Referenced by atrac3_decode_init(), av_close_input_stream(), av_find_stream_info(), av_open_input_stream(), av_parser_change(), concatenate_packet(), cook_decode_init(), decode_init(), ff_cmap_read_palette(), ff_flac_is_extradata_valid(), parse_packed_headers(), put_audio_specific_config(), qdm2_decode_init(), read_kuki_chunk(), read_specific_config(), rl2_decode_init(), rl2_read_header(), rv30_decode_init(), vc1_decode_init(), wmavoice_decode_init(), xvid_encode_close(), xvid_encode_init(), and xvid_strip_vol_header().

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