different albums arts in diferent players Options

[msio]

Hi

I want to embed cover album art to my flac tracks. some tracks, I have,have already a album art. I tried to change these album arts in mp3tag under windows.If I play the track with the changed album art in winamp . it shows correct changed album art but I play it i.e. in VLC . it shows the former album art. I tried to change album art in flac and meta flac command line package under linux with the command

CODE

flac -f abc.flac --picture=cover.jpg

and

CODE

metaflac --import-picture-from=cover.jpg abc.flac

but it still the same. I was just wondering that the former album art was didnt embed as front cover but maybe as back cover and VLC shows back cover. I mean in flac in command --picture it can set up to embed back cover also(in specifikation). i dont understand whats the different between the command
flac -f abc.flac --picture=cover.jpg and the command metaflac --import-picture-from=cover.jpg abc.flac becouse both embed the picture in the file.
Do you know some software to do this write? or is the problem players?
thank you

[timcupery]

I can't help with the coding question, but I am curious whether you've played the changed files in VLC previously. Maybe VLC is displaying cached album art for already-played tracks?