diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 263649f1da..b9956e699c 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -887,6 +887,17 @@ static int mov_write_chan_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *tra
         return ret;
     }
 
+    if (layout_tag == MOV_CH_LAYOUT_MONO && track->mono_as_fc > 0) {
+        av_assert0(!channel_desc);
+        channel_desc = av_malloc(sizeof(*channel_desc));
+        if (!channel_desc)
+            return AVERROR(ENOMEM);
+
+        layout_tag = 0;
+        bitmap = 0;
+        *channel_desc = 3; // channel label "Center"
+    }
+
     num_desc = layout_tag ? 0 : track->par->ch_layout.nb_channels;
 
     avio_wb32(pb, 0);           // Size
@@ -6970,6 +6981,20 @@ static int mov_write_header(AVFormatContext *s)
             if (j == i)
                 continue;
 
+            if (stj->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
+                (trackj->par->ch_layout.nb_channels != 1 ||
+                 !av_channel_layout_compare(&trackj->par->ch_layout,
+                                            &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO))
+            )
+                track->mono_as_fc = -1;
+
+            if (stj->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
+                av_channel_layout_compare(&trackj->par->ch_layout,
+                                          &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO) &&
+                trackj->par->ch_layout.nb_channels == 1 && track->mono_as_fc >= 0
+            )
+                track->mono_as_fc++;
+
             if (stj->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
                 av_channel_layout_compare(&trackj->par->ch_layout,
                                           &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO) ||
diff --git a/libavformat/movenc.h b/libavformat/movenc.h
index 2ac84ed070..67d6d4fb66 100644
--- a/libavformat/movenc.h
+++ b/libavformat/movenc.h
@@ -107,6 +107,7 @@ typedef struct MOVTrack {
     int         tag; ///< stsd fourcc
     AVStream        *st;
     AVCodecParameters *par;
+    int mono_as_fc;
     int multichannel_as_mono;
 
     int         vos_len;