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Git pushed a commit to branch master
in repository ffmpeg.

commit 004127f00b209b29730002f08a276a04ef9a4e47
Author:     Niklas Haas <[email protected]>
AuthorDate: Fri Dec 5 19:12:11 2025 +0100
Commit:     Niklas Haas <[email protected]>
CommitDate: Tue Dec 9 09:47:48 2025 +0000

    swscale/format: explicitly test for unsupported subsampled formats
    
    This includes semiplanar formats. Note that the first check typically
    subsumes the second check, but I decided to keep both for clarity.
---
 libswscale/format.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libswscale/format.c b/libswscale/format.c
index 076990d48d..ffdde2af01 100644
--- a/libswscale/format.c
+++ b/libswscale/format.c
@@ -787,6 +787,15 @@ static int fmt_read_write(enum AVPixelFormat fmt, 
SwsReadWriteOp *rw_op,
     if (!desc)
         return AVERROR(EINVAL);
 
+    /* No support for subsampled formats at the moment */
+    if (desc->log2_chroma_w || desc->log2_chroma_h)
+        return AVERROR(ENOTSUP);
+
+    /* No support for semi-planar formats at the moment */
+    if (desc->flags & AV_PIX_FMT_FLAG_PLANAR &&
+        av_pix_fmt_count_planes(fmt) < desc->nb_components)
+        return AVERROR(ENOTSUP);
+
     *pixel_type = fmt_pixel_type(fmt);
     if (!*pixel_type)
         return AVERROR(ENOTSUP);

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