6 commits

Author	SHA1	Message	Date
Alex Robbin	d6197d4c86	Active Storage: raise PreviewError when a preview cannot be generated ... If a preview cannot be generated, the IO stream that is captured is empty, resulting in a 0-byte preview file being generated and stored in the Active Storage service. We came across this because Poppler was failing to generate previews of some PDFs, resulting in 0-byte files. Resizing those "previews" then resulted in a MiniMagick error. The MiniMagick error feels like the right end result if it's attempted on a 0-byte file, what doesn't feel right is `Previewer` proceeding normally if the child process that attempted to capture a preview exited unsuccessfully. Now, if the previewer child process exits with a non-0 status code, we raise an exception.	2021-02-26 14:06:52 -05:00
Vincent Robert	3803671a81	Generate a preview without print margins ... When a PDF is used for both printing and displaying. It will most likely contain a crop box in order to hide print margins when displaying the PDF. Use Poppler's parameter to automatically use the crop box (visible box) rather than the media box (printable box) in order to remove those margins when drawing the PDF. See https://manpages.debian.org/testing/poppler-utils/pdftoppm.1.en.html	2020-09-17 11:59:45 -04:00
Javan Makhmali	b60ee86d94	Change video preview format from PNG to JPG	2018-05-23 14:32:34 -04:00
Terence Lee	0b717c2045	Provide an alternative PDF previewer based on Poppler ... mutool is licensed under the Affero GPL, which has strict distribution requirements. Poppler is licensed under the more liberal GPL, making it a good alternative for those who can't use mutool.	2018-03-06 13:33:33 -05:00
George Claghorn	605484079d	Extract metadata from images and videos	2017-10-22 13:16:59 -04:00
George Claghorn	d30586211b	Preview PDFs and videos	2017-09-28 16:43:37 -04:00