TYPO3 Core

If Layout 2 or Layout 3 is chosen in the "Filelink" flexform, TYPO3 should create a thumbnail of the uploaded PDF document, but it doesn't.

The problem results from method 'imageMagicExec()' in 'class.t3lib_stdgraphic.php'. The comment annotation tells us, that parameter 'frame' "refers to which frame-number to select in the image. '' or 0 will select the first frame, 1 will select the next and so on..."
But this specification doesn't correspond to the implementation. If 'frame' equals 0 or '' no frame selection is appended to the input filename and therefore the 'convert' command will create a file for every page of the PDF document:
input: file.pdf
output: <hash>-0.jpg, <hash>-1.jpg, ...
The reference to the created file is supposed to be <hash>.jpg which actually does not exist.

See patch for solution.

Furthermore this patch improves performance, if a PDF consisting of many pages is converted. Without the patch every page will be converted, but only the first one is needed actually. With the patch applied only the first page is converted.

The 4.3 branch is concerned by this problem, too.
(issue imported from #M14155)