Fix ff_mov_write_chan() so it can be used by other muxers.

1 files changed, 5 insertions, 1 deletions

diff --git a/libavformat/cafenc.c b/libavformat/cafenc.c
index 0f33c6b592..13636f30ee 100644
--- a/libavformat/cafenc.c
+++ b/libavformat/cafenc.c
@@ -134,7 +134,11 @@ static int caf_write_header(AVFormatContext *s)
     avio_wb32(pb, enc->channels);                     //< mChannelsPerFrame
     avio_wb32(pb, enc->bits_per_coded_sample);        //< mBitsPerChannel
 
-    ff_mov_write_chan(s, enc->channel_layout, "chan");
+    if (enc->channel_layout) {
+        ffio_wfourcc(pb, "chan");
+        avio_wb64(pb, 12);
+        ff_mov_write_chan(pb, enc->channel_layout);
+    }
 
     ffio_wfourcc(pb, "data"); //< Audio Data chunk
     caf->data = avio_tell(pb);