[TYPO3-english] typo3 imagemagik problem

[J. Bakshi]

Dear all,

I am facing a strange problem with imagemagik (4.2.9).
Sometimes the image are not generated correctly. some of  the images
have a grey portion at the bottom part.  It seems that convert command
does not get proper time to generate the image. This mainly happens with
jpg images but gif is not an exception though this problem happens
rarely with gif than jpg. Is it possible to instruct typo3 to allow
convert execution with sufficient time. Though this convert execution
duration is my own thought ( based on google search). there may be some
other reason too but I have no idea presently.   Could any one kindly
suggest ?

Here is my localconf.php for image handling
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$TYPO3_CONF_VARS['GFX']["gdlib"] = '1';  
$TYPO3_CONF_VARS['GFX']["im"] = '1';  
$TYPO3_CONF_VARS['GFX']['im_imvMaskState'] = '1';
$TYPO3_CONF_VARS['GFX']['im_negate_mask'] = '1';
$TYPO3_CONF_VARS['GFX']['im_version_5'] = '';  
$TYPO3_CONF_VARS['GFX']['gdlib_2'] = '0';
$TYPO3_CONF_VARS['GFX']['im_combine_filename'] = 'composite'; 
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Thanks