I am writing a wma to mp3 converter, which preserves tags by using Audio::WMA and MP3::Tag

towards the end of the code, I have this:

$mp3->update_tags( $mp3_tags ); # write tags to tmp.mp3
.
.
copy( 'tmp.mp3', $target);

[download]

(I am using File::Copy copy because some files have all kinds of quotes and so on which make backticks, system, etc awkward. I guess I could have escaped them, but I went this way instead ... that's what modules are for, right?)

Here's the weird thing. My target file (in this case test.mp3) doesn't have tags, but tmp.mp3 does. the files are also a bit different in size:


root@trekulbollox:~/convert_wma# ls -l
total 57864
-rwxr-x--- 1 root root     2595 2011-10-31 03:37 convert_wma.pl
-rw-r--r-- 1 root root        0 2011-10-31 03:37 errors
-rwxr-xr-x 1 root root  9913921 2011-10-31 03:01 original.wma
-rw-r--r-- 1 root root 24627199 2011-10-31 03:38 test.mp3
-rw-r--r-- 1 root root 24627327 2011-10-31 03:38 tmp.mp3
root@trekulbollox:~/convert_wma# id3v2 -l tmp.mp3
id3v1 tag info for tmp.mp3:
Title  : Big Foot                        Artist: Stephen Riley
Album  : Easy to Remember                Year: 2007, Genre: Jazz (8)
Comment:                                 Track: 2
tmp.mp3: No ID3v2 tag
root@trekulbollox:~/convert_wma# id3v2 -l test.mp3
test.mp3: No ID3 tag

[download]

There is really nothing between the writing of tags and the copy that can do this. Is it possible that there is some kind of weird timing issue, where the tag is not flushed to the file before the copy happens?

I am sitting here thinking this must be a late night issue ... but there are no file operations at all between the two points. What is going on ... ?

In reply to strange File::Copy issue by danmcb

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