FFMEPG Picture block too big when converting ALAC to FLAC

[Shaorin]

I'm trying to convert ALAC to FLAC with metadata copied & no compression using this command

ffmpeg -i "01. Radiant.m4a" -c:a flac "01. Radiant.flac"

but I get this error:

[flac @ 0x5773f8a593c0] Picture block too big 26859249 >= 16777216e=N/A speed=   0x

How to fix this?

[davexnet]

Something bad with the source file?
Try this sample, see if it works

[cholla]

Try adding -vn to your code.
It may have been tagged with album art.
Maybe the picture is corrupt or oversize.
If this is the problem you can always tag it after.

[Shaorin]

Try adding -vn to your code.
It may have been tagged with album art.
Maybe the picture is corrupt or oversize.
If this is the problem you can always tag it after.

adding -vn fixed it I also found -c:v copy can fix it but I don't know what the difference between the two flags and whether which is best to use

[cholla]

-c:v copy should keep the picture or album art.

-vn should remove all video

The reason I recommended -vn first is I thought the picture file might be corrupted.