FLAC with ID3v1 ID3v2

My internet radio natively supports playback of flac files from USB. When playing MP3 files, in addition to the file name, the album cover is also displayed on the device's display. When playing flac files, the album cover is not displayed. I have a very large number of flac files, and the metadata is all completely edited in MP3tag, where FLAC (FLAC) is listed in the Tag column. After a long trial, I found that the album cover only appears when I use flac non-standardly with ID3v1 ID3v2.3 by first renaming the file to *.mp3, loading it into MP3tag, and the Tag column shows EROR: MP3 reader Parise error, I insert new data and then the ID3v2.3 data (ID3v1 ID3v2.3) appears in the Tag column, I rewrite it back to *.flac. Then the FLAC data (FLAC ID3v2 ID3v1) will appear in MP3tag in the Tag column. I want the album cover there because if it's not there, the radio downloads meaningless and unrelated pictures from the Internet for some files, which bothers me. Is there any other particularly faster way to write the ID3Tag to the flac file without having to do the above very laborious and lengthy procedure?

That creates an invalid tag format for flac files which is not supported by MP3tag.
You could have to look for a different player or transform the files to MP3 to be played by that particular player.

Is there any other software that can do this?

Why don't you ask the publisher of your player whether they could issue an update so that it supports valid tag formats?

Of course, I asked him first, but he hasn't answered me yet. As I wrote, this is a native support for playing flac files, which is not even officially mentioned in the user manual. For this reason, I am afraid that he will not even answer me.

Windows had problems with FLAC files a while ago. In many cases a reduction of tag field lenghts to ID3v1 standard helped. THis does not mean to add ID3V1 tags but to keep the restriction of V1 tags also in the FLAC tags.
So it maybe worth a try if your player can cope better like that.
Otherwise, the only way would be to get a different player.
Adding ID3 tags to Flac files may help with your current player but will most certainly cause problems with other players.

That player cost me €500, so I won't change it yet. Those modified flac files will be played only on it. There is no risk of incompatibility on other players. Could you be more specific how to do it in Windows?

I am not sure what you mean. Aren't you using the Windows version of MP3tag?
I referred to problems that occurred when WIndows Explorer tried to display tag data from flac files.
And BTW: the ID3V1 standard does not support embedded pictures.
Sorry for the detour to ID3V1. This does not really have something to do with your current problem with flac files.

I use MP3tag in Windows 11. I tried the procedure I described in the first question with only ID3v1 and the image was displayed.

The fix isn't to rename FLAC files as mp3. You have to use a converter that change the actually file type and compresses from FLAC to mp3.

[quote="MotleyG, post:10, topic:65465, full:true"
I renamed that file to mp3 just so I could write ID3v1 ID3v2 to the file, which then appeared in the flac file. I then renamed the file back to flac, where then the FLAC data (FLAC ID3v2 ID3v1) was displayed in the Tag column. With the file modified in this way, my player had no problem displaying the album cover. I don't want to convert these flac files, I want to keep the highest quality during playback.

But if the player can't handle FLAC natively then this isn't a real workaround. If it does handle FLAC and just not the tags, that needs to be addressed by the manufacturer of your player.

This may be true. If the current support is undocumented you may not get anywhere with them.

Glad your workaround is getting you by in this particular case. But it isn't really a recommended option for most players.

To be precise, the manual states that the device is ready to play flac files, it also plays internet radios as well as relevant streaming services with this codec. Maybe it will be fixed (supplemented) in some next version of the software, but I would not like to wait until then and want to play files to my satisfaction already. But the company sold its portfolio to another company, so the website of the original company is no longer functional and the product is not (yet) on the new website, so I am afraid that there will be no communication and therefore no update of the new software. On the old page, among other things, the update could also be downloaded to USB and updated from it, and at the same time a description of the changes was given there. That's why I'm also looking for such an option.
I don't know why, in the current era of freedom, it would not be possible to produce a non-standard file for personal use, which would fully suit the user. The program would warn him in advance when creating it that it might be incompatible with other devices. Is this perhaps governed by some EU directive? If not, why couldn't there be such an editing option in such a great program as MP3tag. I have long ago chosen MP3tag as the best program for editing metadata. I think this problem has already been solved in the past in this community and in other topics, which means that this problem is also bothering other users. I don't know if the creator of the program reads these discussions, and if so, should he take it as an incentive to improve it, or should I write to him directly?

Even within the constraints of the existing "standards" we find many cases where programs push the limits of what was intended for the design, or completely changes them to suit their needs. This causes some havoc with what users expect from their music files and metadata. Especially when working with different platforms between PC and Mac, and mobile device between Android and iOS.

@Florian is the developer and very active here. He can speak to any additions to mp3tag you would like to request. But since you are already aware of the suggested work-arounds for some of the non-standard issues, I hardly think updating the program to invite such changes, even with a warning, falls under a "best practice" approach.

If I understand correctly, you're using embedded cover art only?

Have you tried if the player supports external art in the album folder, e.g. cover.jpg or folder.jpg?

If it does, that would be a faster fix and much better than forcing ID3 tags into FLAC.

Curiosity has me asking what brand/model is this device? Perhaps others here have some additional insight into what they have been able to accomplish with theirs.

Of course I tried that first. I tried all possible *.jpg file names. When the image is as an external file, it does not work even with MP3. The image must be stored inside the file.

Imperial Dabman i560 CD

Other than the file name and album image, no other information is displayed. At the moment I made it at 16!!! with the old dBpoweramp software by changing Vorbis Commets to ID3v2 in the flac settings with the warning "not recommended". But I had to convert the files with flac, which I think is available in version 1.2.2. In MP3tag, in the Tag column, there is only ID3v2 data, in the other fields, no data is displayed. However, other data is visible in another Tagscanner program. It bothers me that the files have to be converted with a "possibly worse" codec, but when a lossless codec is converted to a lossless codec, there should probably be no loss of quality, if so, please correct me.

Theoretically lossless->lossless should not lead to any audio quality drop. But if I were you I would certainly keep my original files intact as they were, and only make copies of them with any planned changes to accomodate this player. You will porbably find that while these modified files play nice with this one streamer, they may not with most others. Before you run down this path, maybe this is a good time to refresh your backup(s)?