[FFmpeg-devel] [PATCH] avformat/isom_tags: fix fourcc for in24/in32 LE (PR #21110)

[FFmpeg-devel] [PATCH] avformat/isom_tags: fix fourcc for in24/in32 LE (PR #21110)

[ngaullier via ffmpeg-devel]

PR #21110 opened by ngaullier
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21110
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21110.patch

This fixes a sample I get recently (a supposed 'iso' mp4 file with 42ni tracks; I think its format is invalid/quicktime-based, but anyway should be supported).
(Note: VLC already supports 42ni/23ni: see fourcc_list.h and plays my sample successfully.)


>From 2f08cf6093c455c520e4725a9ec1ad43b7cdc4a9 Mon Sep 17 00:00:00 2001
From: Nicolas Gaullier <nicolas.gaullier@cji.paris>
Date: Fri, 5 Dec 2025 16:44:03 +0100
Subject: [PATCH] avformat/isom_tags: fix fourcc for in24/in32 LE

Signed-off-by: Nicolas Gaullier <nicolas.gaullier@cji.paris>
---
 libavformat/isom_tags.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavformat/isom_tags.c b/libavformat/isom_tags.c
index 151c42e9e6..b46e293ebf 100644
--- a/libavformat/isom_tags.c
+++ b/libavformat/isom_tags.c
@@ -347,9 +347,9 @@ const AVCodecTag ff_codec_movaudio_tags[] = {
     { AV_CODEC_ID_PCM_S16BE,       MKTAG('l', 'p', 'c', 'm') },
     { AV_CODEC_ID_PCM_S16LE,       MKTAG('l', 'p', 'c', 'm') },
     { AV_CODEC_ID_PCM_S24BE,       MKTAG('i', 'n', '2', '4') },
-    { AV_CODEC_ID_PCM_S24LE,       MKTAG('i', 'n', '2', '4') },
+    { AV_CODEC_ID_PCM_S24LE,       MKTAG('4', '2', 'n', 'i') },
     { AV_CODEC_ID_PCM_S32BE,       MKTAG('i', 'n', '3', '2') },
-    { AV_CODEC_ID_PCM_S32LE,       MKTAG('i', 'n', '3', '2') },
+    { AV_CODEC_ID_PCM_S32LE,       MKTAG('2', '3', 'n', 'i') },
     { AV_CODEC_ID_PCM_S8,          MKTAG('s', 'o', 'w', 't') },
     { AV_CODEC_ID_PCM_U8,          MKTAG('r', 'a', 'w', ' ') },
     { AV_CODEC_ID_PCM_U8,          MKTAG('N', 'O', 'N', 'E') },
-- 
2.49.1

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