ffmpeg | branch: release/4.2 | Michael Niedermayer <mich...@niedermayer.cc> | 
Thu May  1 21:20:31 2025 +0200| [d553897a10dfcb5886fb7a656c5dce0c076ceff0] | 
committer: Michael Niedermayer

libpostproc: check minimum size

Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
(cherry picked from commit 917c15435ae2e11a90de5d1a1153405bd3686fbe)
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d553897a10dfcb5886fb7a656c5dce0c076ceff0
---

 libpostproc/postprocess.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libpostproc/postprocess.c b/libpostproc/postprocess.c
index 1fef8747c0..4f5901217c 100644
--- a/libpostproc/postprocess.c
+++ b/libpostproc/postprocess.c
@@ -950,6 +950,11 @@ void  pp_postprocess(const uint8_t * src[3], const int 
srcStride[3],
     int minStride= FFMAX(FFABS(srcStride[0]), FFABS(dstStride[0]));
     int absQPStride = FFABS(QPStride);
 
+    if (width < 16 || height < 16) {
+        av_log(c, AV_LOG_ERROR, "Postproc is designed to filter 16x16 
macroblock based formats, the minimum size is 1 macroblock\n");
+        return;
+    }
+
     // c->stride and c->QPStride are always positive
     if(c->stride < minStride || c->qpStride < absQPStride)
         reallocBuffers(c, width, height,

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