[FFmpeg-cvslog] avformat/mov: don't abort on duplicate Mastering Display Metadata boxes

[James Almer]

ffmpeg | branch: release/4.2 | James Almer <jamrial at gmail.com> | Tue Mar 26 21:11:20 2024 -0300| [ddb0efbbc101f503e5f39d2133f361b4298a90c9] | committer: James Almer

avformat/mov: don't abort on duplicate Mastering Display Metadata boxes

The VP9 spec defines a SmDm box for this information, and the ISOBMFF spec defines a
mdvc one. If both are present, just ignore one of them.
This is in line with clli and CoLL boxes.

Fixes ticket #10711.

Signed-off-by: James Almer <jamrial at gmail.com>
(cherry picked from commit 189c32f53659b8f9dc402765905fc12a321ab1ac)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ddb0efbbc101f503e5f39d2133f361b4298a90c9
---

 libavformat/mov.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index fd82ca460b..53bcbd6dc0 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -5352,8 +5352,10 @@ static int mov_read_smdm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         av_log(c->fc, AV_LOG_WARNING, "Unsupported Mastering Display Metadata box version %d\n", version);
         return 0;
     }
-    if (sc->mastering)
-        return AVERROR_INVALIDDATA;
+    if (sc->mastering) {
+        av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicate Mastering Display Metadata\n");
+        return 0;
+    }
 
     avio_skip(pb, 3); /* flags */
 
@@ -5390,11 +5392,16 @@ static int mov_read_mdcv(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 
     sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
 
-    if (atom.size < 24 || sc->mastering) {
+    if (atom.size < 24) {
         av_log(c->fc, AV_LOG_ERROR, "Invalid Mastering Display Color Volume box\n");
         return AVERROR_INVALIDDATA;
     }
 
+    if (sc->mastering) {
+        av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicate Mastering Display Color Volume\n");
+        return 0;
+    }
+
     sc->mastering = av_mastering_display_metadata_alloc();
     if (!sc->mastering)
         return AVERROR(ENOMEM);