Hello, if you open an mp4 file properties in windows file explorer there is "Origin" section with the following fields: Directors, Producers, Writers, Publishers, Content provider, Media created, Encoded by, Author URL, Promotion URL, Copyright.
I am trying to write the "Media created" field and have tried: TDEN, TDOR, TORY, TDRL, TYER, TDRC so far witn no luck.
MP3Tag is obviously not able to handle this "tag", as it does not show it in its extended tag-menue, even if it exists or was created in Windows-Explorer.
What about %encodingtime%?
I see that field in the extended fields list of the filter and also in the list of supported tag fields as TDEN: https://docs.mp3tag.de/mapping
I have tried it but what it does it actually creates an additional field "ENCODINGTIME" which is different from "EncodingTime" and no software incl. windows file property system recognizes it.
I also noticed that if I write to "YEAR" using mp3tag it actually writes to "ContentCreateDate" not "Year".
Well, the field TDEN is a V2.4 tag - and Windows does not read V2.4 tags ...
The proper name for a MP4 tag ist WM/EncodingTime. But this should be mapped by MP3tag to %encodingtime%.
So right now I would check if the various experiments with the tags (like creating a V2.4 tag TDEN for an MP4 file) have messed up the tags somehow...