[
https://issues.apache.org/jira/browse/PDFBOX-5217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17364664#comment-17364664
]
Tilman Hausherr commented on PDFBOX-5217:
-----------------------------------------
I don't understand your question ("what is the selection of this Java library
according to the PDF standard"). If you think Adobe Pro DC is better for your
needs, then use that one.
> Rendering takes up too much memory, easy OOM
> --------------------------------------------
>
> Key: PDFBOX-5217
> URL: https://issues.apache.org/jira/browse/PDFBOX-5217
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Affects Versions: 2.0.24, 3.0.0 PDFBox
> Environment: Oracle JDK 1.8.0_291-b10
> MacOS BigSur (CPU i5, RAM8GB)
> Windows 10 (CPU i7 2.80GHz, RAM 16GB)
> Reporter: lanshiqin
> Priority: Major
>
> Conversion of a 20MB PDF file to an image resource consumes more than 8GB of
> memory and takes 5 minutes. That's an intolerable fact.
> Debug found that the memory soared when the file stream was finally read.
> This is my code：
>
> {code:java}
> try(InputStream in = new URL(pdfFileUrl).openStream();
> PDDocument document = PDDocument.load(in,
> MemoryUsageSetting.setupTempFileOnly())){
> document.setResourceCache(null);
> PDFRenderer renderer = new PDFRenderer(document);
> List<String> imgUrlList = Lists.newArrayList();
> for (int i = 0; i < document.getNumberOfPages(); i++) {
> BufferedImage bufferedImage = renderer.renderImageWithDPI(i, DPI);
> File tempFile = new File(OFFICE_CONVERT_TEMP_DIR + fileName + "_" +
> i);
> try {
> ImageIO.write(bufferedImage, "png", tempFile);
> imgUrlList.add("upload to media center get url todo "+i);
> } finally {
> FileUtils.deleteQuietly(tempFile);
> bufferedImage.getGraphics().dispose();
> }
> }
> return imgUrlList;
> }
> {code}
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
