---
libavformat/av1.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/libavformat/av1.c b/libavformat/av1.c
index 0cbffb1fd8..5512c4e0f7 100644
--- a/libavformat/av1.c
+++ b/libavformat/av1.c
@@ -375,6 +375,20 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t
*buf, int size)
if (size <= 0)
return AVERROR_INVALIDDATA;
+ if (buf[0] & 0x80) {
+ // first bit is nonzero, the passed data does not consist purely of
+ // OBUs. Expect that the data is already in AV1CodecConfigurationRecord
+ // format.
+ int config_record_version = buf[0] & 0x7f;
+ if (config_record_version != 1 || size < 4) {
+ return AVERROR_INVALIDDATA;
+ }
+
+ avio_write(pb, buf, size);
+
+ return 0;
+ }
+
ret = avio_open_dyn_buf(&meta_pb);
if (ret < 0)
return ret;
--
2.28.0
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