ID: 17272
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
Status: Suspended
Bug Type: Feature/Change Request
Operating System: N/A
PHP Version: 4.1.2
New Comment:
I ran into the same problem when Flash 6 came out, so I tried to fix
the problem with PHP code. The SWC format is a regular SWF file, but
with a portion of the file compressed with zlib. Unfortunately the
width and height of the SWC file is located inside the compressed
portion.
SWF:
[HEADER - 3 bytes] 'FWS'
[VERSION - 1 byte] In which version was this file created
[SIZE - 4 bytes] size of file
[TAGS] All tags
SWC:
[HEADER - 3 bytes] 'CWS'
[VERSION - 1 byte] In which version was this file created
[SIZE - 4 bytes] size of uncompressed file
[ZLIBSTREAM] Zlib compressed stream of all tags
To decompress the file you need to copy the first 8 bytes of the SWC
file to a buffer and change to first byte of the buffer to 'C'. Then
you need to decompress the remaining bytes of the SWC file and append
it to the buffer.
The following PHP function uses this method to decompress the file:
function phpAds_SWFDecompress($buffer)
{
if (function_exists('gzuncompress') &&
substr($buffer, 0, 3) == swf_tag_compressed &&
ord(substr($buffer, 3, 1)) >= 6)
{
$output = 'F';
$output .= substr ($buffer, 1, 7);
$output .= gzuncompress (substr ($buffer, 8));
return ($output);
}
else
return ($buffer);
}
If you are only interested in retrieving the dimensions of the SWC file
it can be even easier. Just strip the first 8 bytes of the SWC file and
decompress the remaining bytes. The tags for the width and height
should be first two tags inside the decompressed stream.
Previous Comments:
------------------------------------------------------------------------
[2002-05-17 13:27:46] [EMAIL PROTECTED]
I'm suspending this until somebody can show me some documentation on
the new fileformat. Apperently there are two Flash 6 formats, the SWF
one (which works fine and is the same as Flash 5) and the SWC one,
which is some compressed format.
Derick
------------------------------------------------------------------------
[2002-05-16 13:22:22] [EMAIL PROTECTED]
Not really a bug, as it was not written for this :)
Anyway, if you could mail me empty flash movies with the following
size, I'll see what I can do:
255x127
640x480
400x256
(and perhaps some more)
Derick
------------------------------------------------------------------------
[2002-05-16 12:22:48] [EMAIL PROTECTED]
The problem is with the getimagesize() function and its detection
routines which don't detect Flash 6/MX content.
------------------------------------------------------------------------
[2002-05-16 12:00:44] [EMAIL PROTECTED]
Flash file size detection seems to not work for Flash files published
in the new Flash "MX" (version 6). When published to version 5 or
lower, it works.
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Edit this bug report at http://bugs.php.net/?id=17272&edit=1
