Questions tagged [jpeg]

JPEG is a lossy-compression method for a digital image. The images can end up in many JPEG image containers (JPEG, JPG, JIF, JPE, JFI, JFIF) depending on the parameters surrounding the compression of the image data. JPEG is actually an acronym for Joint Photographic Experts Group, the group that created the compression standard for JPEG.

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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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In Windows 10, what is changing the filename extension of JPG files to JFIF?

In Windows 10, the value of Computer\HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg/Extension is changing from JPG to JFIF at frequent intervals This value is changed roughly every 2 to 3 ...
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Opening JPG/TIFF in Preview, Can't Save from Preview

User is trying to open any image file- tiff, jpg etc in the default macOS Preview app and then save/export it to a jpg- usually to the desktop or documents and cannot. See below. System 1 Specs: macOS ...
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4 votes
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Can I change the compression ratio of a JPEG image on travel.state.gov?

When on travel.state.gov's photo editor, I get Image is overly compressed. Please use a compression ratio that is less than 20:1 Is there anyway to get past this screen in the application given a ...
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Create a New Image File Extension in Windows 10 that operates like an image file

I would like to add some new file extensions to my system. Short Version - I would like to add PNG2, PNG3, PNG4, PNG5 exact copies of PNG and JPG2, JPG3, JPG4, JPG5 again, exact copies of JPG. I want ...
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How to convert bmp or jpg (one picture) to m2v

How to convert .bmp or .jpg (one picture) to m2v ? I did it with ffmpeg: -i background32.bmp -maxrate 1M -bufsize iM output.m2v But the output file size is 22kb even if I change maxrate or bufsize. ...
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Compile ImageMagick 6 with custom installation of libjpeg turbo

I have issue when trying to compile ImageMagick 6 with custom installation of libjpeg-turbo. ./configure --prefix=$IMAGEMAGICK_ROOT_PATH CFLAGS="-I/opt/libjpeg-turbo/2.1.1/include" LIBS=&...
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How to sort thumbnails from a collection other low size photos?

I have a collection of low sized photos (low file size, say around 50KB), consisting of thumbnail images of my camera photos, whatsapp forwarded images and other images downloaded from internet. The ...
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How to convert old PEF pentax raw format to jpg or mp4?

I have some old pentax .PEF files and I want to convert it updated jpg or mp4 formats. How do I go about this?
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Pattern_Type Glob or other *.JPG wildcard input file support for Windows 10?

I am using Windows 10 with "ffmpeg version 4.4-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers built with gcc 10.2.0 (Rev6, Built by MSYS2 project)". I am writing a ...
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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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Context menu entry for .jpg files not showing anymore

My custom made context menu entry for .jpg files does not show up anymore in Windows 10. I did the steps correctly by going into the HKEY_CLASSES_ROOT\jpegfile\shell key, adding a new key there, give ...
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What makes two main JPEG file formats, JFIF and Exif, incompatible?

JPEG is not a file format. The two major formats are JFIF and Exif. Wikipedia page on JFIF says that: JFIF is mutually incompatible with the newer Exchangeable image file format (Exif). The two ...
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Is it safe to simply rename a .jfif file to .jpg?

I downloaded several images that are are .jfif files. I have various enhancements (e.g. context menus) and processing scripts that are keyed to *.jpg files and would like to use these with the new ...
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ffmpeg split JPEG-encoded MOV video into frames without reencoding

I have a MOV video file from an old digital camera where the video stream is just a series of JPEGs. I'm trying to extract those JPEGs without reencoding them (or at least come as close to the ...
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Convert all Images of a Type to Another Throughout the Computer Simultanously

I just realized my computer has been saving jpeg files as jfif for some weird reason and I have no idea since when. Is it possible to change the extension of all jfif files to jpg again throughout the ...
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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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Can I convert my octet-stream / text file to a jpeg?

I got a file with MIME type application/octet-stream, off the browser cache. I have a strong feeling it's a jpeg file that I want to open. First few files of the file: ÿØÿà �JFIF������ÿÛ�„� ...
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How to configure Firefox to open JPG files in an external application

I often need to open JPG files from a website that are not rotated properly. I am using Firefox on Windows 10. When I click on their link in Firefox, they open in a new tab and I have to rotate my ...
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.jif images do not show thumbnail on Windows

Any JPG, GIF, PNG, etc, will display a Thumbnail on Windows File Explorer. However, JIF images don't: If I rename ".jif" to ".jpg", it displays the thumbnail: Is there any way to ...
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Processing large amount of WhatsApp jpeg files in Adobe Photoshop

When I tried to open a jpeg file, downloaded from WhatsApp in Adobe Photoshop I've got the following Photoshop error: Could not complete your request because a SOFn, DQT, or DHT JPEG marker is ...
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How to make video from high resolution jpg?

I try to make video from 2 jpeg (6912x3456 px, files is large it is 360 panoramas) with ffmpeg by ffmpeg -r 1/4 -pattern_type glob -i "my_dir/*.jpg" -c:v libx264 -profile:v high -crf 18 -vf &...
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Windows 10 search within images

Just like Windows 10 will search file content like pdfs etc. is there a way to get it to OCR and search within images? Especially I have a lot of screenshots etc in a folder of websites or other text ...
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13 votes
1 answer
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Is it possible to change orientation of JPG image without rotating it (and thus losing information)?

As JPG is a lossy compression, every re-encoding losses quality. Thus, 90/180/270 degree rotation is a lossy operation as well. Is it possible to change orientation of JPG photo by changing some of ...
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Trying to convert jpgs to video but getting only the first frame

Update: Thanks to everyone who weighed in with help, I did finally get it to work. My best understanding is that it was an issue with threading from the original script and the video creation command ...
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On Widows, how can I screen capture, then paste as JPG (not PNG) into gmail?

How can I capture part of a screen on Windows 10, then paste as a JPG? Using the inbuilt snipping tool and third party tools, the resulting pasted image ends up as a PNG in Gmail. PNG files are ...
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Why do edited jpgs get larger

OS: W10 Tool: Photos application I normally scan in pictures away from the top right side of my scanner because of a scanner fault - it produces a lighter coloured line down the picture. Anyway, ...
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Export Powerpoint to a single PDF, each page as an image

I have a Powerpoint presentation. I want to turn it into a PDF. If I Save a Copy and use PDF, there are least two issues that I want to avoid: Text is selectable. This could be perhaps avoided via ...
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Retain quality while mirroring jpg FFmpeg

I can't seem to retain the color of a jpg file when I mirror via FFmpeg: ffmpeg -i "G:\My Drive\Adobe\Photoshop\Discord Emoji\yousellfish\Exports\yousellfish_2x.jpg" ` -vf hflip ` "G:\...
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Remove jpeg artifacts for scanned texts

I have a scanned PDF of a textbook, but the PDF is aggressively compressed so lots of JPEG artifacts are present and affects its readability. Example: I tried a variety of method to fix it but the ...
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1 answer
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Lossless or near lossless compression options for PDFs containing grayscale with JPEG2000?

I have some older books (pre 1900) that I'm working on archiving to a digital format. Most of the time using greyscale is satisfactory in terms of color preservation, however I'm having trouble with ...
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Why do JPEG images appear all smudged, with magenta yellow and cyan scattered over the image?

I have noticed this for JPEG images only, not PNG. For example these captcha images. The skies don't appear clear and natural at all, they appear speckled with random magenta, yellow and cyan pixels. ...
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1 answer
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Find the rotated images in folders

A folder contains 134944 files and 6919 folders. They are graduation albums contains scenes and avtars. The jpg images were generate by the scansnap sv600 and then manually slice, copy, paste, rename,...
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2 votes
2 answers
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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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Identify corrupt photos in Photos.app

What is the best approach to identify all corrupt JPGs managed with Photos.app (formerly known as iPhoto) for macOS? Basically, this is the same question as posed previously, but specifically for ...
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20 votes
7 answers
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Why does Google Chrome save a JPG image to WEBP instead?

I'm trying to save what appears to be a JPG image from Chrome and always end up downloading a WEBP image instead. I'm on Chrome Version 80.0.3987.163 on macOS Catalina (10.15.4) and I'm trying to ...
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firefox color management preferences

the documentation of the Firefox gfx.color_management.mode preference refers to "tagged graphics" and "rendered graphics". These terms are also found in many Mozilla development discussions, and also ...
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How to apply jpeg image rotation not with Exif header mention of this rotation, but with recomputing the data on Windows 10? [duplicate]

Is this option available somewhere? I have a lot of scanned data that has reorientation from landscape to portrait in Exif files, but not in jpeg data itself. And I can't use some file uploaders like ...
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1 vote
1 answer
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Failing to convert JPG to PDF with GhostScript

I'm trying to apply a recipe shared in other posts, but it fails for a reason I can't understand: c:\tmp>gswin64c -sDEVICE=pdfwrite -o output.pdf "c:\Program Files\gs\gs9.50\lib\viewjpeg.ps" -c "(...
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How to find the size of the compressed image?

So, if I have an image in BMP file format being 1024 x 768 and 8 bits (bit depth), I can get the size of the image: 1024 x 768 x 8 = 6,291,456; 6,291,456 / 8 x 1024 = 768 Kb, which is correct when I ...
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How can I open or convert JTIP (jpeg tiled image pyramid) files?

I've found some old photos (.jpg) from 2005 on a harddrive and can't find a way to view them. Using droid, I found out that these seem to be JTIP (jpeg tiled image pyramid)-files. The puid of this ...
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1 vote
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How can I convert a HEIC file to a JPEG file, in Debian?

This question appears to address this https://askubuntu.com/questions/958355/any-app-on-ubuntu-to-open-and-or-convert-heif-pictures-heic-high-efficiency-i However, on Debian, adding the required ...
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-1 votes
2 answers
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Repair corrupted JPEGs by writing magic numbers

I recently used both Photorec and Recuva to recover data from an accidentally-formatted 2TB disk, and as a result have a lot of corrupted JPEGs along with those that were successfully recovered. I'...
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3 votes
1 answer
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ImageMagick failing to match images lower than given dimensions

This is a follow-up question to this one. So far, I've cobbled together the following find command, which is intended to print (and once properly tested, -delete) all JPGs that are 200 x 200px or ...
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1 vote
1 answer
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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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3 votes
1 answer
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How to Paste a picture as JPG instead of PNG

The keyword to my question i "paste", not "save". My company uses a tool that will evaluate the Word documents we made, and one of the criteria is all the images must be in JPG. Regardless of what ...
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1 vote
1 answer
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Recovering a JPEG image with broken sections

Some files were corrupted while being recovered from a disk drive, including portions of videos and images. They all seem to share the trait of having sections of data replaced with repeating bytes (...
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8 votes
3 answers
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What's the difference between jpg and JPG on mac?

Why does the picture on top have 'jpg' capitalized, when they are all JPEG images? Is it because the file size is larger?
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1 answer
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How to use dcmcjpeg to convert DICOM to JPEG?

The dcmcjpeg tool from the dcmtk package (sudo apt-get install dcmtk) is supposed to convert DICOM image files to JPEG. But I suspect it still wraps the image in a DICOM container, because when I try,...
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What software is used here to compress jpeg?

https://compressjpeg.com/ The copression level is pretty inpressive, and I would like to use that encoder (or something similar) offline.
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