ffmpeg v4.1でx265cliでエンコードした.265ファイルを.mkvコンテナに格納できない。

ffmpeg -i "h265.265" -map 0:0 -c:v:0 copy -f matroska "h265.mkv"

[matroska @ 0000000002687b00] Timestamps are unset in a packet for stream 0.
This is deprecated and will stop working in the future. Fix your code to set the timestamps properly

[matroska @ 0000000002687b00] Can't write packet with unknown timestamp
av_interleaved_write_frame(): Invalid argument