[PR] avformat/demux: don't require dimensions for PGS subtitles (PR #24258)

PR #24258 opened by Kacper Michajłow (kasper93)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24258
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24258.patch

Sparse PGS streams rarely deliver a display segment inside the probe
window. Don't fail on that normal situation.


From 3c86e4624eac26584d960ce9fe1b7ac929777c00 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kacper=20Michaj=C5=82ow?= <[email protected]>
Date: Tue, 25 Aug 2026 01:37:59 +0200
Subject: [PATCH] avformat/demux: don't require dimensions for PGS subtitles
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Sparse PGS streams rarely deliver a display segment inside the probe
window. Don't fail on that normal situation.

Signed-off-by: Kacper Michajłow <[email protected]>
---
 libavformat/demux.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libavformat/demux.c b/libavformat/demux.c
index da0f5853cc..58cc265145 100644
--- a/libavformat/demux.c
+++ b/libavformat/demux.c
@@ -2124,8 +2124,6 @@ static int has_codec_parameters(const AVStream *st, const char **errmsg_ptr)
                 FAIL("no frame in rv30/40 and no sar");
         break;
     case AVMEDIA_TYPE_SUBTITLE:
-        if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
-            FAIL("unspecified size");
         break;
     case AVMEDIA_TYPE_DATA:
         if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
-- 
2.52.0

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