[FFmpeg-devel] [PATCH v2 3/4] avformat/movenc: fix writing reserved bits in EC3SpecificBox

James Almer jamrial at gmail.com
Fri Jun 6 03:14:16 EEST 2025


As described in section F.6.1 from ETSI TS 102 366.

Found-by: nyanmisaka
Signed-off-by: James Almer <jamrial at gmail.com>
---
 libavformat/movenc.c         | 2 +-
 tests/ref/fate/copy-trac3074 | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 5941f82521..7bcdc2463d 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -618,7 +618,7 @@ static int mov_write_eac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *tra
         put_bits(&pbc, 3, info->substream[i].bsmod);
         put_bits(&pbc, 3, info->substream[i].acmod);
         put_bits(&pbc, 1, info->substream[i].lfeon);
-        put_bits(&pbc, 5, 0); /* reserved */
+        put_bits(&pbc, 3, 0); /* reserved */
         put_bits(&pbc, 4, info->substream[i].num_dep_sub);
         if (!info->substream[i].num_dep_sub) {
             put_bits(&pbc, 1, 0); /* reserved */
diff --git a/tests/ref/fate/copy-trac3074 b/tests/ref/fate/copy-trac3074
index 53ba27e920..9ed42c8d8d 100644
--- a/tests/ref/fate/copy-trac3074
+++ b/tests/ref/fate/copy-trac3074
@@ -1,5 +1,5 @@
-36fcc0a62695bcf93068fcfe68283ee9 *tests/data/fate/copy-trac3074.mp4
-334016 tests/data/fate/copy-trac3074.mp4
+5b4a3ed9de3b2a92e5dcb127bca12e68 *tests/data/fate/copy-trac3074.mp4
+334015 tests/data/fate/copy-trac3074.mp4
 #tb 0: 1/48000
 #media_type 0: audio
 #codec_id 0: eac3
-- 
2.49.0



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