Extra binary data needed for initializing the decoder, codec-dependent.
Must be allocated with av_malloc() and will be freed by
avcodec_parameters_free(). The allocated size of extradata must be at
least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding
bytes zeroed.
Extra binary data needed for initializing the decoder, codec-dependent.
Must be allocated with av_malloc() and will be freed by avcodec_parameters_free(). The allocated size of extradata must be at least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding bytes zeroed.