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Yiyuan GUO authored
In libavfilter/vf_palettegen.c, the function get_avg_color requires that box->len greater than zero to avoid dividing by zero. However, the call sequence filter_frame -> get_palette_frame -> get_avg_color may not satisfy this precondition. Fixes #9222. Signed-off-by: Yiyuan GUO <yguoaz@gmail.com>
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