From: Niklas Haas <g...@haasn.dev>

Since this is guarded behind strict unofficial, we should warn if the
user feeds a dolby vision stream to this muxer, as it will otherwise
result in a broken file.
---
 libavformat/movenc.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 15b65dcf96d..0f819214be9 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2528,16 +2528,21 @@ static int mov_write_video_tag(AVFormatContext *s, 
AVIOContext *pb, MOVMuxContex
         const AVPacketSideData *spherical_mapping = 
av_packet_side_data_get(track->st->codecpar->coded_side_data,
                                                                             
track->st->codecpar->nb_coded_side_data,
                                                                             
AV_PKT_DATA_SPHERICAL);
-        const AVPacketSideData *dovi = 
av_packet_side_data_get(track->st->codecpar->coded_side_data,
-                                                               
track->st->codecpar->nb_coded_side_data,
-                                                               
AV_PKT_DATA_DOVI_CONF);
-
         if (stereo_3d)
             mov_write_st3d_tag(s, pb, (AVStereo3D*)stereo_3d->data);
         if (spherical_mapping)
             mov_write_sv3d_tag(mov->fc, pb, 
(AVSphericalMapping*)spherical_mapping->data);
-        if (dovi)
+    }
+
+    if (track->mode == MODE_MP4) {
+        const AVPacketSideData *dovi = 
av_packet_side_data_get(track->st->codecpar->coded_side_data,
+                                                               
track->st->codecpar->nb_coded_side_data,
+                                                               
AV_PKT_DATA_DOVI_CONF);
+        if (dovi && mov->fc->strict_std_compliance <= 
FF_COMPLIANCE_UNOFFICIAL) {
             mov_write_dvcc_dvvc_tag(s, pb, (AVDOVIDecoderConfigurationRecord 
*)dovi->data);
+        } else if (dovi) {
+            av_log(mov->fc, AV_LOG_WARNING, "Not writing 'dvcC'/'dvvC' box. 
Requires -strict unofficial.\n");
+        }
     }
 
     if (track->par->sample_aspect_ratio.den && 
track->par->sample_aspect_ratio.num) {
-- 
2.44.0

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