Questions tagged [png]

PNG (portable network graphics) is a popular image format that supports 32-bit colors and transparency.

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36 views

Decode WebP with FFmpeg

I would like to convert this file: https://gstatic.com/webp/gallery/1.sm.webp To PNG or JPG with FFmpeg. I tried this: ffmpeg -i 1.sm.webp a.png but and error was produced: ffmpeg version git-...
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0answers
14 views

PNGs are displayed small and can not be zoomed in gThumb

I just installed gThumb in ubuntu which works fine except that it does not display PNG images correctly. I have an HD PNG image which when opened with gThumb appears as if it's a 100x100 thumbnail or ...
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1answer
41 views

ffmpeg - encode file for iPad (xlib264) and add thumbnail in one go

I would like to put some videos on iPAd with Cover/Thumbnail image I can do that in two steps. That seems to work, but I'm not able to encode and add image at the same time. (Win 10 and the latest ...
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1answer
42 views

Set display color of transparecy in PNG

Is it possible to set the color that the transparency of a PNG should be displayed with, if viewed standalone? My motivation is: if I have a PNG with white text and transparency and I show this image ...
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0answers
70 views

How to save high resolution charts .png in Excel for Mac?

Is there any way to save a chart from excel to a high resolution png-file on office for Mac? I have tried to copy them into Word as well as saving them as a html-file, but the quality becomes really ...
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1answer
60 views

Is it possible to compress alpha and RGB channels of PNG sequence separately with FFmpeg?

Suppose I have a sequence of 32-bit (RGBa) PNG files. Is it possible to compress the RGB channel with one codec and the alpha channel with another? For example, if I had the RGB and alpha as separate ...
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1answer
66 views

How to convert the svg outcome to png?

I am using this package to generate a sequence diagram https://github.com/francoislaberge/diagrams Here is a very simple sequence diagram file: Alice->Bob:Hello I ran this command diagrams ...
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1answer
81 views

Text highlight in image

I have articles of newspaper in png format, want to highlight these images similar to pdf text, is there any possible tool or method to do it? I have syncronized this images in my desktop to cloud ...
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0answers
22 views

Colour change occurs when exporting png/jpeg compared to h.264 in after effects

when I'm exporting an animation in after effects the colour seems far darker than when I'm exporting a still frame. Using PNG/JPEG for frame and H.264 for the animation. Any way I can make them come ...
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49 views

How do I make my PNGs have transparent thumbnail in Windows File Explorer?

Example provided below of the issue (where a black PNG is all black)
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0answers
34 views

“Canonicalize” PNG files

I am looking for a way to process a set of PNG files in such a way that if they contain the same image data, the files will be byte-by-byte identical too. Is there a quick and easy, automatable way ...
2
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1answer
177 views

How to convert an in-line image to a floating image in Word?

I would like images that I insert into Word documents to have white resize handles and for it to be possible to group them with other images: Currently, when I insert an image into a Word document, ...
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1answer
62 views

How can I losslessly convert .webp images to .png?

I have a bunch of .webp images that I want to convert to .png. How can I do that without introducing any loss? GUI or CLI doesn't matter
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1answer
71 views

How to determine the color mode of a .png file

How do you determine the color mode of a .png file? So if its black and white (grayscale) vs. RGB vs. RGB+transparency? Can you do this without installing software? I am on windows (though I'm sure ...
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1answer
64 views

FFMPEG image concatenation giving different results based on colors in PNG file

I am using the following code to take a number of PNGs of varying durations and the overlaying them over another video. ffmpeg -safe -0 -f concat -i overlap-png.txt -i mainvideo.MOV -...
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1answer
111 views

Difference between GIMP Indexed color mode and Imagemagick -colors or -remap

My task is to reduce size of scanned text document into .png with acceptable quality loss. My procedure consist of those steps: Raw images are scanned in tif format and processed by ScanTailor (...
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0answers
25 views

Gifsicle: Multiple image sources

With Gifsicle, is it possible to combine multiple images (PNG) into a gif? (with variable delays) I was thinking more like what FFmpeg or Gifski can do.
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1answer
91 views

How can I increase the resolution of a text in a PNG file?

I have images (PNG) with text in them, but if you were to zoom it would become pixely. How can I fix this? I even have a PDF where if you zoom as much as you can you still can't see the pixels. But if ...
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2answers
159 views

How to convert multiple images at once from JPEG to PNG?

How can I convert multiple images at once from JPEG to PNG? The JPEG to PNG converter on my MacBook does not convert many images quickly at once. My option is now: Convert JPG to PNG - JPG4PNG
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2answers
157 views

Everytime I convert PDF to PNG it becomes more pixely. How can I fix it?

The pdf file I use is high quality, and if you were to zoom at a letter as much as Adobe Reader can handle, you still find it difficult to look at a blocky pixel at the edges of a letter. But when I ...
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0answers
6 views

Is it possible to improve the pngquant output in this case?

Here is part of the original image Here is the output from pnqguant with quality set to 50. You can see the artefacts in the shadow area of the compressed image is very prominent. Is there any ...
7
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2answers
169 views

Can I crop an image without fully loading it into memory?

I managed to generate a PNG image with a fractal. The image is 65,536 pixels high and 65,536 pixels wide. It’s too big to be decoded into memory and displayed. It has probably a lot of unused space ...
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1answer
21 views

Can I pad the size of an image without changing the dimensions or content?

I am using an internal tool at my workplace that has a minimum image file size. Unfortunately, I have a use case where I need to upload and interact with image files that come in below this limit. ...
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2answers
442 views

How to create an image with plain text?

You open a new .txt file, you write the instructions there for an image and when you save it as .png it should present you an image. How the image looks is not important. I'm just curious if I could ...
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2answers
120 views

Export Diagram from Word as HighRes PNG?

I have this abysmal word document (docx) where someone put an UML diagram in (technical drawing) which is so large, that 500% zoom is not enough to read the labels on an A4 page. Thus, I tried to ...
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1answer
62 views

Resize png smaller without loss of quality?

I am working with textures that I purchased in Second Life. Most of these are 1024x1024. However, i create children's clothing, when means most of these are in too large of a format for said ...
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1answer
658 views

FFmpeg - Adding watermark on an image

I used this command to add a watermark on an image: ffmpeg -i input.png -i watermark.png -filter_complex overlay=15:15 output.png But I got this error: [NULL @ 0x7a1403f800] Unable to find a ...
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0answers
41 views

Is replacing PNGs with JPGs the solution to generating reliable images in PDF files?

I generated a PDF from a document that contains many images, mostly JPGs, but some PNGs. In the doc (Libre Office .odt), the page in question looks like this: When I "exported" the document to a PDF,...
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1answer
51 views

Create higer resolution icons from existing png

I have from a very old project a set of icons but I don't have the psd I made. I have 72x72 material design icons like this Is there a way to properly convert this png icons to higer resolutions?
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3answers
1k views

Does PNG bit-depth conversion from 8-bit to 32-bit increase quality?

An image is converted from 32-bit to 8-bit. Is any information lost after converting it back to 32-bit?
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0answers
54 views

Is it possible to render and/or recover half of an apparently damaged PNG file?

I have a chunk of a PNG file, missing its end. An unknown amount of data from the IDAT chunk is missing, as well as the IEND chunk. I've inspected the IHDR and it looks completely fine, correctly ...
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1answer
117 views

Why binary files like this snippet of a PNG has all this whitespace in it

Here is a snippet of the first part of a PNG file viewed just by opening it up in Sublime Text and viewing the hex code directly. 8950 4e47 0d0a 1a0a 0000 000d 4948 4452 0000 02e7 0000 0155 0806 0000 ...
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1answer
573 views

ffmpeg resize PNG image sequence using alpha padding

I am trying to resize a sequence of PNG images using alpha padding (the images are already surrounded by alpha pixels). The following command resizes how I want, but it adds black pixels: ffmpeg -i "...
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4answers
5k views

How do I convert a TTF into individual PNG character images?

I want to generate a .PNG image for every glyph in a .TTF font file. How do I do that?
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1answer
69 views

Convert bmp to png and black colors to alpha

I exported some sprites from the game Half-Life; however, they seem to have tones of black instead of the alpha channel. For example: How do I convert the black colors into alpha/transparency?
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0answers
122 views

How to extract/convert hundreds of .mov files into PNG image files,automatically creating a folder for each group of PNG files extracted

I need to batch extract and convert hundreds of .mov files into PNG image files, automatically creating a folder for each group of PNG files extracted. (I’m working on Windows 10). Can you suggest to ...
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1answer
555 views

Irfanview: How to stop gif images from overriding resize settings

I have set my Irfan View to automatically Scall all Images to window size. This works great for normal images. However I have noticed that, instead of fitting gifs into the window the same way it does ...
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0answers
90 views

How do I use ffmpeg to hide a png randomly in one frame of the video?

I like to hide little Easter eggs in all my videos, but it is rather tedious. Is it possible to hide a png in one frame preferably at random locations/orientations within said frame using ffmpeg?
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1answer
147 views

What color is this PNG?

This: https://user-images.githubusercontent.com/23437045/33275828-c96e8810-d3a4-11e7-9e36-f8fed85b6203.png That's what QuickLook shows: This is what Preview shows: This is what Firefox shows (...
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4answers
2k views

I am seeing animated PNG files on some sites in lieu of GIFs. How can I save/download them?

I know how to save a GIF, it's super easy. Just right click and save. Voila! But with these new animated PNG's, I haven't the foggiest. Without using some sort of screen scrape where I'm grabbing the ...
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1answer
671 views

Ffmpeg - save bmp file as different extension

I want to save a bmp file as 1.mp4 using Ffmpeg, how to achieve it? The question is very simple. I have some source file, lets call it source.png and I want to encode it as bmp, but to save it as a ...
0
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1answer
625 views

Split .png into multi-page pdf with imagemagick based on whitespace

Currently I have a hand written image darkened with convert -level 50x100% It contains chunks of text separated by whitespace. Simply printing the image would split handwriting in half. Is there a ...
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1answer
760 views

Can PNG images contain embedded thumbnails like JPG files?

Can PNG (Portable Network Graphics) image files contain embedded thumbnails similar to how JPG files can?
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3answers
8k views

How do I export a Word document as a PNG?

I have a Microsoft Word 2010 document which I want to save as a .png image file, so I can include it as part of a PowerPoint slide. In Powerpoint, there's a built in "Save As" option for exporting ...
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3answers
8k views

Invisible PNG image layer that is only visible as a background

I have recently came across a very peculiar image, with strange properties. The image is in PNG format and just shows a simple bird with a transparent background. My friend sent me the image with ...
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1answer
381 views

Convert SVG image to PNG with magnification

How ca I convert a SVG image to a PNG image with magnification and without pixelation? I have tried to open with Paint.NET (with a plugin) and GIMP but I did not succeed. The final image is not ...
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1answer
476 views

How can I convert a .png image to .pdf with OCR text? [closed]

I have a .png file that is a screenshot of an article I found online. I would like a PDF version of it, with all the text selectable. Are there any apps or tools that do that?
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2answers
994 views

Render HTML email as PNG

I have an email message in my IMAP inbox. It's HTML email that makes use of fonts, tables, images and such. How do I convert this email message into a PNG image that looks reasonably close to what I ...
0
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1answer
1k views

Png picture in Excel distorted when exported to pdf

When I insert a png picture with transparent background in Excel, it looks good in sheet and print preview, but after save in pdf format, the lines gets distorted. The problem occours using a pdf ...
2
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3answers
243 views

How do I open .ai files on Windows 8.1?

Specifically this file https://stock.adobe.com/stock-photo/flux-vague-de-dollars-illustration/35571058 I tried to rename the file with .pdf extension, but FoxIt would not open it. I tried to install ...

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