Better description (merge is too vague IMHO).
Originally committed as revision 12174 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -168,9 +168,9 @@ AVFilterFormats *avfilter_make_format_list(int len, ...);
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AVFilterFormats *avfilter_all_colorspaces(void);
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/**
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* If a and b share at least one common format, they are merged into a new
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* format list which is returned. All the references to a and b are updated
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* to point to this new list, and a and b are deallocated.
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* Returns a format list which contains the intersection of the formats of
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* a and b. And all the references of a and b, and a and b will be
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* deallocated.
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*
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* If a and b do not share any common formats, neither is modified, and NULL
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* is returned.
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