zhilizhao (12019-12-24): > 1. AV_PIX_FMT_NB depends on !gaps, unless we calculate and set it manually
NB is not really the "number of". > 2. The reason to deprecated VAAPI in this way (ABI incompatible) is > AV_PIX_FMT cannot have gaps No, it was because we WANTED AV_PIX_FMT to not have gaps. It had some in the past, there may be reasons to have anew in the future. But I just realized: there is a much simpler reason that makes this particular approach impossible: AV_PIX_FMT_NB ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* AV_SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if linking dynamically you cannot use AV_PIX_FMT_NB or AV_SAMPLE_FMT_NB in lavfi, only in lavu. Regards, -- Nicolas George
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