Questions tagged [png]

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

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32 views

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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1answer
54 views

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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14 views

imagemagick convert *.png to .mp4 runs, then stops with no error

I have successfully made .mp4 loops out of a small number of .png files with convert -delay 10 -quality 95 *.png output.mp4 However, at say 500 .png's, the conversion proceeds and finishes without ...
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20 views

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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1answer
89 views

A PNG sequence to a GIF results in artifacts

Why would FFmpeg create these artifacts like remaining pixels on the edges of the animation where objects have already removed and how to remove these? Why would it create this magenta/red colored ...
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1answer
12 views

Is it possible to quickly export a .jpg and .png simultaneously in Photoshop?

I work with product images for an online retail site. Each product image needs to have a .jpg copy and .png copy. Currently, I just export once as .jpg and then export again as .png. This is both time-...
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29 views

How to recreate an image from a HTTP POST request sent to a input stream in Java?

A simple Java web server (manual HTTP protocol implementation, we're dealing with sockets here) serves an HTML form, the client uploads an image (PNG) through the web browser. This creates a POST ...
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1answer
45 views

ffmpeg not making the correct video size

I've been trying to join a bunch of .png files into an mp4. The .png files are all 1920x1080 but my output file is always smaller, i.e. 1920x1072. What silly mistake have I made here? ffmpeg -...
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45 views

Can be changed to batch file?

I would like to create a .bat file that converts all .png files in a folder into individual .mp4 files that have the same name as the .png file: This converts a .png into a 30s video, however how do ...
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1answer
385 views

How to convert svg to png with ffmpeg?

Is there a way to convert svg files to png using ffmpeg on Windows 10 64bit? I obviously tried ffmpeg -i "file.svg" "file.png" and it doesn't work by default. Perhaps there is ...
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16 views

ImageMagick, PNG and lossless operations

It's probably very stupid question… AFAIK, PNG is lossless format. I suppose, ImageMagick's convert without additional options should make no changes to an image. Then why convert source.png copy.png ...
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1answer
467 views

Why does this PNG display differently in Firefox vs Chrome?

Here is the image: This image has no gAMA chunk or color profiles. I tried to remove the sRGB chunk, but have not been able to, with pngcrush or pngfix. Despite this, this image displays differently ...
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17 views

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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3answers
2k views

How to increase the byte size of a file without affecting content?

Is there a way to easily and arbitrarily increase the byte size of a file without corrupting its content? For instance, by inserting dummy bytes. The file for my use case is of type png. I am on OS X, ...
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1answer
43 views

I need Windows CMD to loop through folders in a directory and execute a command to convert webp to png on each one

I have always use this command line to convert .webp to .png: for %f in (*.webp) do dwebp.exe "%f" -o "%~nf.png" Works like a charm for single folders, but now I have several ....
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33 views

How to ignore transparency when using ffmpeg with PNG files? [duplicate]

Every topic I find shows how to keep the transparency but I want to remove it without having to change the image format. Camtasia is crashing when I import the ffmpeg encoded MP4 file using the PNG ...
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1answer
91 views

Split a large packed file based on hex/string

I have a large package file which has a lot of files in it. For example, a file named "Data.Rpack" which has 50 *.PNG files. When I opened a PNG image file with Notepad++, it started with &...
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1answer
105 views

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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19 views

Saving metadata in png in Adobe Photoshop CS3

I am a Windows user. How can i save metadata in png file. Does Adobe CS3 support this? I've keyed in metadata and saved it but the metadata is missing
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1answer
54 views

how to compress an extremely large (1 million pixel x 1 million pixel) P4 PBM file into PNG

I have a 128GB .pbm file for the Mandelbrot set, and I would like to compress this into a PNG file so it takes up far less space. is there any feasible way to convert a file this large, I only have ...
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2answers
158 views

Convert mathematical formula to image locally on Linux

Looking for a way to produce .pngs or similar of mathematical formulas locally, for use in documents and presentations. There are plenty of online tools, but I was hoping for a tool I can use from the ...
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42 views

downloading PNG files to my windows machine from Linux remote server via putty

Hi is there any easy/straightforward way to download the png image file on my windows machine from a remote Linux server via putty. I am not sure about the syntax. this is the directory I want to ...
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29 views

Is it glut able to output font files?

Currently I'm converting png's to svgs and creating a font from the svgs, which takes a lot of computation time, and I was wondering if there are faster ways to generate a font in the form of a .ttf,....
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15 views

Automatically refresh PNG file created with gnuplot

I'm writing a gnuplot program using emacs. On invoking a keyboard shortcut the editor saves the file and runs gnuplot, taking my program as input, producing a png as output. Now I want to display the ...
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14 views

Lossless Image Storage Formats [duplicate]

I have tried creating numerous 2048x2048 images in paint.net, and saving them as full-quality images in both png and bmp file formats. I was told png was the best way to store images without loosing ...
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2answers
1k 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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27 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
199 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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2answers
61 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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2answers
908 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
174 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
421 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
258 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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87 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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37 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 ...
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2answers
2k 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
76 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
250 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
67 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
369 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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1answer
270 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
517 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
321 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
9 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 ...
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2answers
257 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
27 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
1k 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
500 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
86 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
1k 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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