[FFmpeg-devel] [PATCH] avfilter/vf_libplacebo: ensure linear tex is blittable (PR #20466)

[Niklas Haas via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #20466 opened by Niklas Haas (haasn)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20466
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20466.patch

Required to clear textures to a background color.


>From 1f2de0f61888e4d16b9e124fc4b4728dd3642981 Mon Sep 17 00:00:00 2001
From: Niklas Haas <git@haasn.dev>
Date: Mon, 8 Sep 2025 15:42:01 +0200
Subject: [PATCH] avfilter/vf_libplacebo: ensure linear tex is blittable

Required to clear textures to a background color.
---
 libavfilter/vf_libplacebo.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_libplacebo.c b/libavfilter/vf_libplacebo.c
index f4b5ac6b03..5e0a678ff2 100644
--- a/libavfilter/vf_libplacebo.c
+++ b/libavfilter/vf_libplacebo.c
@@ -1423,13 +1423,15 @@ static int libplacebo_config_output(AVFilterLink *outlink)
 
     if (s->nb_inputs > 1 && !s->disable_fbos) {
         /* Create a separate renderer and composition texture */
-        pl_fmt fmt = pl_find_fmt(s->gpu, PL_FMT_FLOAT, 4, 16, 0, PL_FMT_CAP_BLENDABLE);
+        const enum pl_fmt_caps caps = PL_FMT_CAP_BLENDABLE | PL_FMT_CAP_BLITTABLE;
+        pl_fmt fmt = pl_find_fmt(s->gpu, PL_FMT_FLOAT, 4, 16, 0, caps);
         bool ok = !!fmt;
         if (ok) {
             ok = pl_tex_recreate(s->gpu, &s->linear_tex, pl_tex_params(
                 .format     = fmt,
                 .w          = outlink->w,
                 .h          = outlink->h,
+                .blit_dst   = true,
                 .renderable = true,
                 .sampleable = true,
                 .storable   = fmt->caps & PL_FMT_CAP_STORABLE,
-- 
2.49.1

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