[FFmpeg-devel] [PR] avfilter/scale_eval: Use 64bit for factor_w/h (PR #21402)

[FFmpeg-devel] [PR] avfilter/scale_eval: Use 64bit for factor_w/h (PR #21402)

[michaelni via ffmpeg-devel]

PR #21402 opened by michaelni
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21402
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21402.patch

Avoids truncation and overflows

Fixes: #YWH-PGM40646-14
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>


>From 2c03767670773ee495e74df4b19956d2e829ebf2 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Wed, 7 Jan 2026 03:05:34 +0100
Subject: [PATCH] avfilter/scale_eval: Use 64bit for factor_w/h

Avoids truncation and overflows

Fixes: #YWH-PGM40646-14
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavfilter/scale_eval.c | 2 +-
 libavfilter/vf_zscale.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/scale_eval.c b/libavfilter/scale_eval.c
index ad65610992..b7899a880e 100644
--- a/libavfilter/scale_eval.c
+++ b/libavfilter/scale_eval.c
@@ -116,7 +116,7 @@ int ff_scale_adjust_dimensions(AVFilterLink *inlink,
     double w_adj)
 {
     int64_t w, h;
-    int factor_w, factor_h;
+    int64_t factor_w, factor_h;
 
     w = *ret_w;
     h = *ret_h;
diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
index 96cbd3c4b2..3b87b12e80 100644
--- a/libavfilter/vf_zscale.c
+++ b/libavfilter/vf_zscale.c
@@ -264,7 +264,7 @@ static int config_props(AVFilterLink *outlink)
     double var_values[VARS_NB], res;
     char *expr;
     int ret;
-    int factor_w, factor_h;
+    int64_t factor_w, factor_h;
 
     var_values[VAR_IN_W]  = var_values[VAR_IW] = inlink->w;
     var_values[VAR_IN_H]  = var_values[VAR_IH] = inlink->h;
-- 
2.49.1

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