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

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avconv and ffmpeg: errors reading png files

I'm trying to use avconv to overlay data onto a video. I generate PNG files representing the overlay data at 4fps. The PNG files are the 120px wider and 60px taller than the original video, because ...
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22 views

LibreOffice has ugly PNG import

I'm trying to import a PNG graphic exported from Inkscape (I tried importing the SVG directly but it doesn't work: the text is missing and replaced by black boxes) in a LibreOffice document, but it ...
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6answers
14k views

How is PNG lossless given that it has a compression parameter?

PNG files are said to use lossless compression. However, whenever I am in an image editor, such as GIMP and try to save an image as a PNG file, it asks for the compression parameter, which ranges ...
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2answers
32 views

Convert PNG to Multi-page PDF

I've seen a lot of posts about how to convert a multi-page PDF to PNG but I'm wondering how I can go in the opposite direction if I have the size of each page I want made.
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1answer
14 views

I would like to batch change one colour in a group of PNGs. Mac - freeware software

I hope someone would be able to help me. I have a group of icons in png format. They are all transparent backgrounds with one colour for the actual icon. I would like to change this colour in all of ...
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1answer
155 views

how to remove a png file's background using paint.net

I have a png file that is composed of only two colors: white and dark. Majority of image space is occupied by the white color but I want to remove this white color, thus giving the image a transparent ...
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1answer
110 views

FFMPEG combine PNGs of different size into movie

Is it possible to combine PNG of different heights without rescaling (like tile does)? I have pairs of images of same width, but first has height 900px and second 200px. I would like them to merge ...
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740 views

correctly sizing PNG images in markdown with pandoc for html/pdf/docx

I am trying to use markdown with pandoc to convert a single document into html, pdf, and docx. It's an extremely simple document containing only math-less text and a few images. The images are in ...
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2answers
16 views

PNG file has different colours in different programs

I downloaded an icon from Icons8. With their tool I recolored it to dark blue (#2c3e50). After unpacking and uploading the 48px icon I got the following result: As you can see the color is not ...
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2answers
488 views

File Attributes - AI …Any clues?

Can anyone point me what does it mean when a .png file having 'AI' as File > Properties > Details > Attributes. Does it mean it made with Adobe Illustrator ? Also note that the png is 8bit image.
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1answer
123 views

PNG/BMP images become blurred on zoom

I recently installed a Debian Jessie desktop and when opening PNG/BMP images it all becomes blurred on zoom (in or out). With the image at 100%, everything looks sharp as expected. This happens both ...
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1answer
102 views

How can I explode an animated PNG?

Websites like GIF Explode allow you to "explode" an animated GIF into its component frames, and similar results are presumably easy to achieve with standard image-editing tools like GIMP, ImageMagick, ...
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2answers
77 views

How can I create an MNG file out of PNGs?

I am really struggling to find compatible software that will allow me to animate PNG files. The GIMP plugin crashes my GIMP. Nothing else supports it. Is there any way I can easily put together the ...
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1answer
276 views

Why are there no video formats that support transparency?

Why are there no [widely supported] video formats that support transparency? For example, the PNG image format supports transparency, allowing for some interesting effects in websites and documents. ...
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3answers
159 views

Do more compressed PNG images take longer to load?

When I create PNG files with very small disk size, I tend to wonder if the file size becomes less important than the time viewers would need to decompress the image. Technically that would be trivial ...
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1answer
272 views

How can I convert a large PDF to PNG?

I want to convert a very large PDF file (>2GB) to a PNG (or JPEG) file so that it is easier to open and look at. I want to do that without opening the PDF file since it is too large to be opened. Is ...
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1answer
94 views

Transparent regions of pasted png display as black in Inkscape

If I copy and paste, for instance, this image from Chromium or Opera webbrowsers into Inkscape, the regions which should be transparent are rendered as black, like so: How can I avoid this?
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37 views

ImageMagick: is there a way to get the same PNG from the same image on multiple platforms?

I have a script for converting game assets to multiple resolutions, via imagick, and when I run the same imagick commands on Mac and Windows (with the same version of imagick - ImageMagick 6.8.7-2), ...
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1answer
451 views

gnuplot not working on ubuntu

My initial problem is that i am unable to find png as list of terminals in set term. So using the link http://askubuntu.com/questions/393882/png-terminal-in-gnuplot, I installed the gd library.And ...
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1answer
171 views

Unable to plot png in gnuplot

i need to plot png files in gnuplot 4.6.3 and/or 4.6.4.I am unable to do so as set term does not list "png" as an option. system information is Linux masterx-Studio-1535 3.5.0-27-generic #46-Ubuntu ...
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1answer
264 views

How to make SVG in Inkscape really scalable?

I wanted to know how to make SVG from a raster picture in Inkscape. I am in Wikipedia which uses lot of SVG's so I want to make a few. I know how to track those PNG and export the bitmap results as ...
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0answers
176 views

Using Ghostscript, can an image output be scaled prior to “printing”?

I'm working on a project where par of the requirements are to convert the first page of a PDF to a PNG. This in and of itself is relatively simple, but I've yet to find a way to scale the resulting ...
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0answers
704 views

Exporting high quality PNG from LibreOffice Draw

I need to generate a PNG file of an image composed in LibreOffice Draw. When I export to PNG directly, the quality is almost perfect, but it's just slightly blurry. However, when I export directly ...
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169 views

Image optimization: Photoshop CS6 vs jpegtran / OptiPNG

Is there any difference in terms of algorithm for optimization between Photoshop's Shift+Alt+S (save for web) and jpegtran's -optimize and -progressive? It seems my images are not reduced (or reduced ...
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2answers
248 views

Fix Linux-made png file for use on Windows

There is a particular icon library that I really like from DeviantArt. Now, I have downloaded the package that has the png files inside (I know the ico files are there, but I want the png files). ...
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4answers
2k views

How to open huge PNG image [duplicate]

I have a really big PNG image, it's ~11GB. Is there any way to open it? I would just like to view it without too many problems. I tried Photoshop CS6 and it's too big even for this kind of modern ...
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4answers
2k views

How to change DPI of a PNG file? (in command line, without ImageMagick)

I am looking for a way to change the DPI on PNG image files. Using ImageMagick this is easy: $ convert -density 150 -units pixelsperinch file.png file.png The problem is that I will run this ...
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1answer
5k views

Using ffmpeg to make a movie from png files

I have 277 800x600 png files with filenames with the format island_sizes-CSH(II)-###.png where ### is a number starting with 084 and ending at 360. I'm doing ffmpeg -i island_sizes-CSH\(II\)-*.png ...
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2answers
441 views

How does this animated png work?

I've just received an email that contains a remotely hosted animated png. The png file is a countdown timer. Here is the URL:- https://img.kickdyn.com/57/1MfiOGVFjvmaMMHd3VZv/imgancnt.png Can ...
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1answer
117 views

Turn monotone background in transparent

On the internet, you usually get images, that originally were PNGs with aplha chanel and were pasted on white background. Is there some way to substract the white from the zones, where the ...
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3answers
225 views

Convert single PNG image into single PDF

I need a method to convert single images (specifically PNG format) into PDF's that are automatically re-sized to fit that single image (and not remain the default 8.5x11" letter size). I could do this ...
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1answer
176 views

Why do light edges appear on transparent PNGs online?

Everytime I try to use transparent PNG images on sites, white edges keep appearing around the images, seen in the photo below. How come this is happening, and how do I stop this from happening? ...
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3answers
615 views

Transparent texture rendered as black

I'm trying to render a scene with transparent png. The scene is actually imported from a .obj file (with another .mtl file), which should technically applies the transparency for me. ^ It does ...
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1answer
2k views

Mac get info always showing png icon instead of the icon

When I open 'Get Info' copy my icon over the default and it applies it but it never shows it. It only shows the default PNG icon (with the pictures and the camera). Does anybody faced the problem ...
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1answer
2k views

Why is R having trouble rendering plots to a PNG file?

I am trying to get R to do some very basic plotting and such in UNIX, but am getting a weirdo error relating to X11, when as far as I can tell I'm not even needing X11. I have a matrix name d and ...
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2answers
2k views

ImageMagick Convert: How to produce sharp resized PNG files from SVG files?

I am using this command to generate a sharp 512px wide version of an SVG file that I have: convert -geometry 256 pinterest.svg pinterest.png This is the source file: <?xml version="1.0" ...
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1answer
3k views

Converting RGB images into lossless video with avconv / ffmpeg

I am trying to convert a series of PNG24 images containing a screen animation to a lossless video, so that every pixel is reproduced exactly as it was in the original. But avconv (and ffmpeg) both ...
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1answer
163 views

Batch image replace 2 colors

I know there is already such question but it didn't helped me. I have a lot of image files, where I want to change purple RGB(255, 0, 255) to transparent (it is png). Is there any app which could do ...
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1answer
2k views

How do I merge a folder of PNG images to a mp4 movie using avconv?

I have a folder containing many time stamped PNG images which I'd like to merge to a short movie. The contents of that directory looks like this: └── images ├── img_20130421_115547.png ├── ...
557
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5answers
72k views

Why does this PNG image display differently in Chrome & Firefox than in Safari and IE?

Check this image out: On Chrome and Firefox it will show as a pear. Now, try to save it and look at it saved on your desktop. Also, try viewing in Safari or Internet Explorer. It will display ...
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2answers
1k views

PNG file size is too big after converting from JPG

I try to convert a JPG file to PNG, but the size is still too big, about 7 MB. What's wrong? I used Microsoft Paint to convert it. The original file is only 500 KB in JPEG, yet the PNG file is 7 MB. ...
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3answers
5k views

How to convert GIF files to PNG or JPEG in OS X with command line?

I have 10k+ GIF files that I need to convert to PNG or JPEG preferably using command line so that I can automate it. I'm not worried about losing quality or transparency, just need to prepare files ...
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2answers
743 views

Create a .png with zopfli

I wanted to give zopfli a try since I have some static .png's that I am using on a website. I see how I can create .gz and .deflate-files. But how can I create a png that can be displayed in FF, ...
5
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1answer
2k views

How do I convert (.gif to .png) this image to get the original view?

I am trying to convert this image, http://en.wikipedia.org/wiki/File:Dijkstra_Animation.gif, to a series of .png files. This was pretty simple, I used the convert command in Linux, convert ...
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2answers
271 views

Why shell commands for PNG file in Windows 8 doesn't work?

I have exactly same task like here: Windows 7 - Add shell command for .png file But this solution doesn't work in Windows 8 for unknown reason only for PNG files. And I don't know why. I tried some ...
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1answer
46 views

Postscript to png conversion loss

When converting Postscript files to PNG, is there any loss of fidelity in the converted files? The postscript files are scanned at 1200DPI. If there is such loss, how can it be kept minimum? I'm ...
5
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1answer
11k views

How can I convert a series of PNG images to a video for YouTube?

I have a sequence of PNGs (here is one specimen) which I turn into a video with ffmpeg: ffmpeg -r 10 -i image%03d.png -s 1380x720 -c:v libx264 -qscale 10 -r 30 basf_merck_libx264.mp4 With ...
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1answer
418 views

Why are colors changed in the preview for my clip on YouTube?

I have 1000 PNGs created with R and ggplot2. This is one for example: image000.png Now I use ffmpeg to glue them together into a clip: ffmpeg -r 10 -i image%03d.png -s 1380x720 -vcodec png ...
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2answers
1k views

convert serveral image files to a single djvu file

Suppose I have serveral BMP image file, say 001.bmp, 002.bmp,..., 100.bmp. I want to convert these files to a single djvu file, whose first page is the content of 001.bmp, the second page is the ...
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2answers
2k views

“Bake” an SVG image into a PNG at a given resolution?

I'm on Linux and I'd like to take an SVG file and bake it into a PNG file at a given resolution (scaling). Is there a way to do this quickly and effectively from the command line? I'm looking for ...