Mkv delete creation metadata

[bzalel]

Hi,

(Sorry for my spelling, I don't speak English)
First of all, I want to say that I have been looking for a solution, for a long time and I have read several threads in this forum and other articles on the Internet.

In a videos with mkv format, I want to delete the metadata "Muxing App", "Writting App" and "Date/Time Original".
The rest of the metadata I have already been able to delete using commands like:
"ffmpeg.exe" -y -i "input.mkv" -map 0 -map_metadata:g -1:g -metadata:v title="" -c copy "output.mkv"
mkvmerge.exe" -o "output.mkv" --no-attachments --no-track-tags --no-global-tags --disable-track-statistics-tags "input.mkv"
mkvpropedit.exe" "input.mkv" -d title
nircmdc.exe" setfilefoldertime "input.mkv" "01/01/2000 00:00:00:00" "01/01/2000 00:00:00:00" "01/01/2000 00:00:00:00" "01/01/2000 00:00:00:00"

But these 3 metadata, I am unable to delete them.
my last tests have gone by doing something like:
mkvpropedit "input.mkv" -e info -s "creation_time=2000-01-01T00:00:00:00+00:00"
Changing creation_time, by date, creation_date, etc.
But I always get an error like:
Error: The name 'creation_date' is not a valid property name for the current edit specification in '--set creation_date=2000-01-01T00:00:00:00+00:00'.

Please, does anyone know how to empty those fields without the need of a hexadecimal editor?

I attach screenshots of the fields with Exiftools and Media Info, I also include a small example video.

Thanks for everything and best regards.

[Krispy Kritter]

Have you tried MKVToolNix?

[ENiGMA59]

cmd

"C:\ffmpeg.exe" -i "C:\Users\ENiGMA59\Videos\How.To.Fix.a.Drug.Scanda l\4.mkv" -c copy -bsf:v 'filter_units=remove_types=6' "C:\Users\ENiGMA59\Videos\How.To.Fix.a.Drug.Scanda l\4.1.mkv"

[bzalel]

Thank you very much ENiGMA59
Your example
-bsf:v 'filter_units=remove_types=6'
serves to remove "Date/Time Original",
but there were still "Muxing App", "Writting App" that I replaced them with Lavf58.13.102 of ffmpeg.
But it helped me to know what to look for
Adding -bitexact -map_metadata -1
Reduces Lavf58.13.102 to a simple Lavf
The final set of commands used in a bat, to clean up all the mkv metadata is:

"mkvmerge.exe" -o "output1.mkv" --no-attachments --no-track-tags --no-global-tags --disable-track-statistics-tags "input.mkv"
"ffmpeg.exe" -i "output1.mkv" -c copy -bitexact -map_metadata -1 -bsf:v 'filter_units=remove_types=6' "output2.mkv"
"mkvpropedit.exe" "output2.mkv" -d title
"nircmdc.exe" setfilefoldertime "output2.mkv" "01/01/2000 00:00:00" "01/01/2000 00:00:00" "01/01/2000 00:00:00"