Questions tagged [png]
PNG (portable network graphics) is a popular image format that supports 32-bit colors and transparency.
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questions with no upvoted or accepted answers
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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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6
votes
1
answer
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Convert png sequence to x264 with ffmpeg
I am trying to convert a series of pngs into an mp4 video. I am using ffmpeg, and want to encode the video with the H.264 codec. Using the command
ffmpeg -y -r 30 -b 1800k -i _tmp%04d.png -vcodec ...
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How can I edit PNG file rating property value in Windows 10?
In Windows 7 and 8 I was able to edit the rating of PNG files by right clicking on that file and going to Properties, Details, Rating.
In Windows 10 this is not available anymore for PNG files, but ...
3
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What is @OpenWithToastLogo.png?
I copy-n-pasted some text from Notepad into a command line window. The copied text included a tab character prefixing the text I copied, for example "{tab}test.exe". When I pasted this into the ...
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2
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Keep transparency when saving svg animation to apng sequence
Is there a way to do this on Windows? I tried ImageMagick with no luck. Some programs work for static svg files, but I haven't found a way to do this for svg animations.
I have an animation file in ...
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2
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2
answers
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Is it possible to retrieve the compression level from a png image?
In my project we deal with png images. In order to create (encode) and read (decode) png images we use libpng.
From libpng it is possible to specify the compression level using ...
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2
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0
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Why have multiple PNG files been transformed to glitches on the external hard drive?
Pictures have been made and edited using Adobe Photoshop and saved as PNG on a MacBook
If the hard drive of the PC is almost full the edited pictures will be copied to an external hard drive in order ...
2
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0
answers
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Windows 7 Colors (PNG darker in browsers)
A few days ago I installed f.lux, and since then I've noticed that my PNG images look darker in Firefox. I've never encountered such a problem before. It doesn't work with it (f.lux) disabled either. ...
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2
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1
answer
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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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0
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How do I create very large .gif files from .png frames, avoiding memory limitations?
I would like to create a .gif from single .png frames and am dealing with lots of very large files. The .png files are roughly 10GB in total.
So far, I have done the following:
ffmpeg -framerate 30 ...
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1
vote
1
answer
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Preserving transparent colors when converting svg to png
I have an SVG file that contains transparent colors like "#FF000080".
When I convert the SVG to PNG using ImageMagick, the transparent colors are converted to black. (Any colors without an ...
msailor
1
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0
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207
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Merging a list of PNG and JPG images into a video is not working
I'm trying to merge a list of images JPG and PNG (contains transparent area) following the rules below:
If the image is a PNG, it should be drawn over the previous JPG image.
If the image is a JPG, ...
1
vote
1
answer
954
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combine pngs images with transparency into a video and merge it on a static image
I'm trying to combine multiple png frames into a video with ffmpeg, keeping the transparency, to then combine it with an image. The png video comes with a black background so when i try to combine it ...
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2
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FFMpeg - JPG/PNG images render in incorrect orientation in MP4 output file and can't be combined in same MP4 video
I am a new user to FFMpeg.
I want a command-line that will create a basic slideshow MP4 video from a folder of JPG and/or PNG images. The images are sourced from either digital cameras/smartphones or ...
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1
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0
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PNG -- extract transparency mask, color, then reapply
I have a PNG which is basically some icons colored in certain ways, with a transparency mask around the edges of them.
I want to recolor these icons in certain ways.
The way I want to approach it is ...
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1
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1
answer
72
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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 ...
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1
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0
answers
566
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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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1
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1
answer
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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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1
vote
2
answers
3k
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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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0
answers
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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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1
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0
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478
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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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0
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.MOV video compressed with PNG has no alpha channel
I have a QuickTime file .mov with alpha channel compressed with PNG codec. What I need is to create smaller version of this file using ffmpeg. Everything works except new mov has no alpha (Adobe After ...
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1
answer
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How can I add metadata to PNG images on OS X/Linux?
Is there a program for OS X and Linux that I can use to add Textual information to PNG image files? Something for Windows also, maybe?
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Render Video as png with Alpha
I have pixel art that I want to put in an animated png. I animated it in the timeline, but when I rendered it into a series of pngs, It has no partial transparency. Anyone know how to solve this?
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0
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Set .png default compression in Photoshop CS6
Is there a possibility to set .png default compression options to "NONE / fast"?
Whenever I try to save as .png, the default option is set to "smallest / slow".
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0
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Fail to convert png from 3gp
Here is the command I used to convert the video.
ffmpeg -skip_frame nokey -i input.3gp -vsync vfr -frame_pts true output.png
(The command can't be modified because this is a code section captured from ...
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0
answers
46
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ffmpeg png to mov keep exact colors
When I convert a PNG sequence to a h264 (yuv420p) movie and read the color values via FFmpeg's rawvideo pipe output, the values on each pixel is slightly modified.
This is how I write my image:
import ...
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answers
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identify PNGs in SVG's clothing
I sometimes encounter "faux" SVGs, i.e., SVG images files that simply list pixels as paths:
<svg xmlns="http://www.w3.org/2000/svg" width="1295" height="573"&...
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Only PNG thumbnails are not shown on Windows 10, unless the defail app is Paint.NET
On my ASUS laptop with Windows 10 (UX425J) I have a problem very similar to what is described in Thumbnails (only .png) and some icons on taskbar stop showing (Windows 10) and Can't see PNG previews ...
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1
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705
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Invalid PNG signature FFmpeg
I am using FFmpeg to generate a video from a set of images in .png format.
I used the below command to extract the images from a video.
ffmpeg -i RGB.mkv -map 0:0 -vsync 0 -c:v copy RGB-%04d.png
I ...
0
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0
answers
364
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FFMPEG converts HEVC with Alpha mov to PNG sequence not work well
I have a mov file with HEVC with Alpha codec on Mac. The mov file has no background color, but have some foreground contents in it. I want to use FFMPEG to grab some PNG pictures from it. Following is ...
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Is there a program that can select the smallest files by size during a file conflict in windows 10
So I'm resizing some VTFs by converting them back into PNGs then sizing them down to 512x512 as maximum anything smaller stays what it is. that said I have 2 folders 1.oldmats 2.newmats. now while ...
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1
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Can apng or any other image filetype be animated over many years?
I am wondering if there is a suitable image type that can be animated or a layer can be animated to vanish over a long period of time... like years?
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Outlook mis-declaringn TIFFs as PNGs
I often receive emails with screenshots as inline images sent from Outlook/Office365 where the image is sent like this:
Content-Type: image/png; name="image001.png"
Content-Description: ...
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1
answer
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Word is cropping and adding white instead of a full image
I am trying to insert a PNG image into my word document, but it doesn't insert the full image and instead inserts a cropped version of it with some image being just white:
The full image is supposed ...
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How do I print an extremely long but narrow image (png file)?
Someone asked me to print out an entire conversation thread they had on a messaging app, graphics and all. (Don't ask.) The app is Viber; neither the iphone nor desktop app has a print function, and ...
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ffmpeg: How to scale .png over time
I would like to slowly scale up a .png over 10 seconds, from start to finish.
I'm having trouble finding the solution. I am new to ffmpeg, and I don't seem to find any solutions to my issue.
ffmpeg -i ...
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0
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2
answers
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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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393
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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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"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 ...
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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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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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0
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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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answers
239
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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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1
answer
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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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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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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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0
votes
1
answer
571
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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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1
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Screenshot saved in PNG has different size from Linux than Windows
Here's the thing: I moved full time to Linux a few weeks ago and was editing a spreadsheet that I use regularly and suddenly realised that when I take a screenshot of a portion of it the resulting ...
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639
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ImageMagick convert chokes on a large PNG, makes system nearly freeze
I have this PNG file which I want to convert to JPG format. It's a little large - about 20,000 x 30,000 pixels (but compressed very well, i.e. 780 KB). I'm running
convert myfile.png myfile.jpg
and ...
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