Stack Overflow
Stack Overflow

Questions tagged [jpeg]

JPEG is a common lossy compression method for digital images. Use this tag for questions about JPEG images using the image/jpeg MIME type.

JPEG is a common lossy compression method for digital images. Use this tag for questions about JPEG images using the image/jpeg MIME type.

See also , , and for other image file formats with JPEG in the name.

More information at the JPEG Wikipedia page.

4926 questions
2
votes
1 answer

JPEG decompression from MemoryStream c#

In my program, I compress a BMP into a JPEG like this: private void ConvertBmpToStreamJPG30(Bitmap b, Stream s) { s.Flush(); EncoderParameters encoderParameters = new EncoderParameters(1); encoderParameters.Param[0] = new…
Poutchyouk
  • 33
  • 4
2
votes
2 answers

How to get meta data with MMPython for images and video

I'm trying to get the creation date for all the photos and videos in a folder, and having mixed success. I have .jpg, .mov, and .mp4 videos in this folder. I spent a long time looking at other posts, and I saw quite a few references to the MMPython…
b-ryce
  • 5,752
  • 7
  • 49
  • 79
2
votes
1 answer

getting mulitple images from a single stream piped from ffmpeg stdout

I start a process to retrieve a few frames from a video file with ffmpeg, ffmpeg -i ".mp4" -frames:v 10 -f image2pipe pipe:1 and pipe the images to stdout - var cmd = Process.Start(p); var stream = cmd.StandardOutput.BaseStream; var img…
PJ7
  • 763
  • 5
  • 15
2
votes
1 answer

How to read a jpeg quantization table?

How do I extract the quantization coefficients from a jpeg file on Linux? I know they're in there somewhere! I see how to get them in Java: Reading quantization tables of jpeg files in Java
OneSolitaryNoob
  • 5,423
  • 3
  • 25
  • 43
2
votes
3 answers

"decoder jpeg not available" with Django on Elastic beanstalk

I am developing a Django backend system on Elastic beanstalk. When I upload JPEG image file, I get the error decoder jpeg not available. Uploading .png image files does not cause any problem. Backend environment: AWS beanstalk: 64bit Amazon Linux…
user2990490
  • 21
  • 3
2
votes
1 answer

32 bit depth jpg images problem in IE when referenced locally

We have an webbapplication that takes an image that will be uploaded and resized. The resize-library we used saved all pictures with 32-bit depth whatever the depth was before. We have an online client that can view the pictures via an html-file and…
Stefan
  • 11,423
  • 8
  • 50
  • 75
2
votes
0 answers

Imagemagick PDF to JPG conversion failing

I'm trying to convert the first page of a PDF to a JPG. I'm pretty sure I got this to work with certain PDFs, but is it really possible that certain PDFs are made incorrectly and cannot be converted? I tried running this first: $ convert…
Scott
  • 65
  • 8
2
votes
1 answer

How do I modify metadata in JPG files with VBA

I need to perform a batch modification of metadata because my father wants to place a "title" in all .jpg images in a folder. I told him to look into the photos and write down in a Excel spreadsheet the information to write down in order. One cell…
Antonio E.
  • 359
  • 1
  • 9
  • 27
2
votes
1 answer

How do I use progressive jpegs on the web?

Progressive JPEGs seem pretty useful for performance purposes. I've found: https://github.com/gruntjs/grunt-contrib-imagemin, which has an option to progressive'ify your jpegs. It is using http://libjpeg-turbo.virtualgl.org/ under the hood. This is…
Parris
  • 17,833
  • 17
  • 90
  • 133
2
votes
2 answers

ActionScript 3 Read JPEG quality

I am developing image uploader for Flash 10. Is there a way to read jpeg quality of the browsed images.
user255392
  • 413
  • 1
  • 5
  • 6
2
votes
1 answer

Strange bug involving string comparison in Lua

I am trying to create a program that scrapes images from the web in Lua. A minor problem is that images sometimes have no extension or incorrect extensions. See this animated "jpeg" for example: http://i.imgur.com/Imvmy6C.jpg So I created a function…
Houshalter
  • 2,508
  • 1
  • 18
  • 20
2
votes
3 answers

Php and Mysql Blob image

what I need to do in my website is to show a list of jpg images stored in a Mysql database using Blob type (I don't want to use any other way). but instead of the image I got strings like this ����$ExifMM*bj(1r2��i��SI'SI'Adobe Photoshop CS6…
user3897018
  • 21
  • 1
2
votes
1 answer

Javascript render jpeg binary data from variable

How to render JPEG/PNG file data contained in Javascript variable? Is it possible ? What javascript libraries needed ? Browser in use is FF / IE. Thanks
night_coder
  • 305
  • 6
  • 8
2
votes
1 answer

Setting the DPI meta-information for a jpeg file in Android

In an Android application that I am writing, I have a document image (jpeg) that is being uploaded to a server that recognizes the document and sends me back the relevant details. While all that is well and fine, the code in the server expects me to…
avismara
  • 5,141
  • 2
  • 32
  • 56
2
votes
1 answer

Large number of soft page faults when assigning a TJpegImage to a TBitmap

I have a Delphi 6 Pro application that processes incoming jpeg frames from a streaming video server. The code works but I recently noticed that it generates a huge number of soft page faults over time. After doing some investigation, the page…
Robert Oschler
  • 14,153
  • 18
  • 94
  • 227
1 2 3
…
99 100