4/15/2023 0 Comments Ffmpeg tutorial phpIt returns zero to indicate success, because there are no possible input cases which this filter cannot handle.įinally, the function which actually does the processing for the filter, draw_slice(): ![]() It then stores a set of offsets for compensating for different luma/chroma value ranges for JPEG YUV, and a different set of offsets for other YUV colorspaces. This simply calls avcodec_get_chroma_sub_sample() to get the chroma subsampling shift factors, and stores those in the context. This structure is declared in libavfilter/avfilter.h:Īvcodec_get_chroma_sub_sample(link->format, &neg->hsub, &neg->vsub) This structure gives information needed to initialize the filter, and information on the entry points into the filter code. ![]() All filters are described by an AVFilter structure.
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