Can we optionally use ImageMagick for Preview Generation?

[Jitender Dhiman, geändert vor 9 Jahren.]

Hi team,

I have a question that can we use both PDF Box and Image Magick for preview generation and dynamically choose it while uploading file..??
Looking forward for answer.

[David H Nebinger, geändert vor 9 Jahren.]

I think selection is just based upon mime type of the file. I think pdfbox gets pdfs where IM gets different types such as png, gif, ...

[Jitender Dhiman, geändert vor 9 Jahren.]

Thanks David but due to less RAM on our system we cannot use IM fro all files. we just want to use IM for PPT, is it possible??

[Juan Gonzalez, geändert vor 9 Jahren.]

Jitender Dhiman:

Thanks David but due to less RAM on our system we cannot use IM fro all files. we just want to use IM for PPT, is it possible??

No, this isn't possible out of the box.

What version are you using? From Liferay 6.2, this bug had been solved:

https://issues.liferay.com/browse/LPS-34028

and should increase the stability of your system when converting PDF using default system (PDFBox).

[David H Nebinger, geändert vor 9 Jahren.]

Juan, I think he's saying that IM has the memory issue, not pdfbox.

But still the answer to Jitender's question is no, you cannot be selective in that way.

Besides, Jitender, if your system is that memory constrained, you're going to keep smacking your head into that ceiling again anyway. Just bite the bullet and add memory to the system or VM. In the long run you'll be glad you did.

[Juan Gonzalez, geändert vor 9 Jahren.]

Jitender Dhiman:

Hi team,

I have a question that can we use both PDF Box and Image Magick for preview generation and dynamically choose it while uploading file..??
Looking forward for answer.

Ok going to the root issue, why do you want to use ImageMagick instead of PDFBox? What Liferay version are you using? In Liferay 6.2 PDFBox library had been upgraded and many issues been solved thanks to that.

[Jitender Dhiman, geändert vor 9 Jahren.]

We are using 6.1 and documents uploaded on our system are sometimes in GB. So imageMagick takes so long to create document's preview and crashes due to less memory.
PDFBox changes the font of PPTs so we want to use PDFBox for all except PPT which could be done by IM.

Is there any solution?

[David H Nebinger, geändert vor 9 Jahren.]

Have you installed and enebled OpenOffice/LibreOffice?

[Jitender Dhiman, geändert vor 9 Jahren.]

yes Open Office is installed.

[Jitender Dhiman, geändert vor 9 Jahren.]

this guy also having same issue... but post is 2 year old..
https://www.liferay.com/community/forums/-/message_boards/message/43795408

[Juan Gonzalez, geändert vor 9 Jahren.]

Yes, there are memory problems using ImageMagick, which uses Ghostcript.

First of all, you are talking about PPT and PDFBox/ImageMagick. PDFBox should only create previews for PDF files, not PPT. Did you embed PPT inside PDF?

Second, you can check if this issue is reproducible with those documents on Liferay 6.2, as PDFBox had been upgraded. I remember some fonts problem was solved.

Finally, as stated here:

https://issues.liferay.com/browse/LPS-29708?focusedCommentId=333365&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-333365

can you check if decreasing :

dl.file.entry.preview.document.dpi=72

fixes the memory problem when using ImageMagick?