Commit 8a0d1b17ae for ffmpeg

commit 8a0d1b17aeb1f5d58ae3e8883fd6dd423eef3572
Author: Niklas Haas <git@haasn.dev>
Date:   Fri Oct 23 15:31:15 2026 +0200

    avfilter/vf_libplacebo: fix forcing output color properties to 0

    These options default to -1 (auto), but were only applied when positive,
    so e.g. colorspace=gbr or range=unspecified were silently ignored.

    Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
    Sponsored-by: nxtedition AB
    Signed-off-by: Niklas Haas <git@haasn.dev>

diff --git a/libavfilter/vf_libplacebo.c b/libavfilter/vf_libplacebo.c
index f3bdf756b5..4f7d7f3472 100644
--- a/libavfilter/vf_libplacebo.c
+++ b/libavfilter/vf_libplacebo.c
@@ -1363,20 +1363,20 @@ done:

     RET(ff_formats_ref(outfmts, &cfg_out[0]->formats));

-    outfmts = s->colorspace > 0 ? ff_make_formats_list_singleton(s->colorspace)
-                                : ff_all_color_spaces();
+    outfmts = s->colorspace >= 0 ? ff_make_formats_list_singleton(s->colorspace)
+                                 : ff_all_color_spaces();
     RET(ff_formats_ref(outfmts, &cfg_out[0]->color_spaces));

-    outfmts = s->color_range > 0 ? ff_make_formats_list_singleton(s->color_range)
-                                 : ff_all_color_ranges();
+    outfmts = s->color_range >= 0 ? ff_make_formats_list_singleton(s->color_range)
+                                  : ff_all_color_ranges();
     RET(ff_formats_ref(outfmts, &cfg_out[0]->color_ranges));

-    outfmts = s->alpha_mode > 0 ? ff_make_formats_list_singleton(s->alpha_mode)
+    outfmts = s->alpha_mode >= 0 ? ff_make_formats_list_singleton(s->alpha_mode)
                                  : ff_all_alpha_modes();
     RET(ff_formats_ref(outfmts, &cfg_out[0]->alpha_modes));

-    outfmts = s->chroma_location > 0 ? ff_make_formats_list_singleton(s->chroma_location)
-                                     : ff_all_chroma_locations();
+    outfmts = s->chroma_location >= 0 ? ff_make_formats_list_singleton(s->chroma_location)
+                                      : ff_all_chroma_locations();
     RET(ff_formats_ref(outfmts, &cfg_out[0]->chroma_locations));
     return 0;