If Streaming from VLC to ffmpeg then metadata gets lost

[FishFloat]

Hi guys
I have problem with streaming from VLC and then record with ffmpeg. The metadata gets lost.

I have used exiftool.exe to input an artist name:
exiftool -artist=my_metadata video_with_metadata.mp4
...and that was successful becuase I can list all metdata:
XMP Toolkit : Image::ExifTool 10.97
Artist : my_metadata
Avg Bitrate : 4.46 Mbps
Image Size : 640x480
Megapixels : 0.307
Rotation : 0

ffmpeg.exe -i udp://127.0.0.1:8080 -c:v copy new_video_with_metadata.mp4
The video is recorded but the metadata gets lost.
If I stream from VLC to ffmpeg then metadata gets lost...these two lines are gone from the new video file:
XMP Toolkit : Image::ExifTool 10.97
Artist : my_metadata

I have also tried with a lokal file with just ffmpeg:
ffmpeg.exe -i video_with_metadata.mp4 -c:v copy new_video_with_metadata.mp4
But still no metadata in the recorded file

Please can anybody help me to understand why the metadata gets lost?

/F

[jagabo]

Of course metadata gets lost. It's not part of the video or audio that's being streamed. That's why it's called metadata.