[Bug 741144] New: id3demux cannot extract the tag info in UTF-16 character format

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=741144
  GStreamer | gst-plugins-base | 1.2.3

           Summary: id3demux cannot extract the tag info in UTF-16
                    character format
    Classification: Platform
           Product: GStreamer
           Version: 1.2.3
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: lyon.wang at freescale.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=292169)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=292169)
patch to fix the issue that id3 tags utf16 charaters cannot be extreacted 

in id3demux when I tried to get the id3v2 tag such as TIT2, TALB etc. it will
return extract failed.

Checked in id3v2frame.c,  When parse the UTF-16 streams, it used g_convert()to
convert the buffer from UTF-16 to UTF-8, however it will return err that this
conversion is not supported which cause the extraction failed with these UTF-16
characters.

In the patch, use g_utf16_to_utf8() instead of g_convert, which can convert the
character format successfully.

This issue was found on my gst-plugins-base-1.2.3 environment, however i see it
is the same at the latest code.

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