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commit 4a4d89cd7635891343a249a06d04de837a4a1c5b
Author:     Jun Zhao <[email protected]>
AuthorDate: Fri Aug 28 10:31:53 2026 +0800
Commit:     Jun Zhao <[email protected]>
CommitDate: Fri Sep 11 22:31:03 2026 +0000

    avformat/mov: keep st3d type when merging vexu eyes
    
    vexu eyes/stri only records packed vs single-eye, not SBS/TB. Writing
    both boxes (MP4 with -strict unofficial) let that UNSPEC type overwrite
    the layout already parsed from st3d. Keep the more specific type so
    the file round-trips in ffprobe.
    
    Signed-off-by: Jun Zhao <[email protected]>
---
 libavformat/mov.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index f1fdff2ccd..59361cd30d 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -7573,7 +7573,12 @@ static int mov_read_eyes(MOVContext *c, AVIOContext *pb, 
MOVAtom atom)
     }
 
     sc->stereo3d->flags                           = flags;
-    sc->stereo3d->type                            = type;
+    /* eyes/stri only records packed vs single-eye, not SBS/TB. Keep a more
+     * specific type already set by st3d. */
+    if (type != AV_STEREO3D_UNSPEC)
+        sc->stereo3d->type = type;
+    else if (sc->stereo3d->type == AV_STEREO3D_2D)
+        sc->stereo3d->type = type;
     sc->stereo3d->view                            = view;
     sc->stereo3d->primary_eye                     = primary_eye;
     sc->stereo3d->baseline                        = baseline;

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