Posts Tagged ‘jpeg images’

Converting jpeg / png pictures to mp4 format videos on Linux with avconv

Wednesday, June 12th, 2013

making mp4 videos from jpeg and png pictures gnu linux
Here in my job, there is one internet (TV) around which can only read video formats in Mp4. Henceforth I needed a way to convert a number of JPEG / PNG format Picture files to Mp4. In my situation I needed to make video out of pictures and script it as this was required to be later pushed via FTP protocol to the Internet TV. Ater doing some research I figured out this is possible to build video out of pictures by using together ImageMagick and avconv.

First thing is to send pictures in certain resolution. There is a tool from imagemagick package called mogrify (which can do that). To convert a number of different dimension pictures to lets say 1024×768, used:

noah:~# mogrify -resize 1024×768 *.png

In earlier Linux distributions to create a movie from pictures ffmpeg was used like so:

# ffmpeg -qscale 5 -r 20 -b 9600 -i SDC%04d.png movie.mp4

However in newer version of ffmpeg support for this is removed, and to make video from images, there is other tool avconv. On most Linux distributions avconv is part of libav-tools package.

To install on avconv Debian and Ubuntu;
noah:~# apt-get install –yes libav-tools

Once installed to create single mp4 video from JPEG or PNG pictures:

noah:~# avconv -i SDC106001.JPG SDC10595.JPG SDC13611.JPG SDC13612.JPG SDC13614.JPG  movie-from-pictures.mp4

I found there is also a nice GUI,software Open Movie Editor, which can create video out of number of pictuers stored in a directory. 
Open Movie Editor is available in most Linux distributions (unfortunately as of time of writting on Debian Wheeze there is no install candidate of openmovieeditor), there is however substitute package doing the same job called openshot);
On latest Debian stable to install Openshot:

noah:~# apt-get install –yes openshot

openshot running on Debian Wheezy Linux create video from pictures

Openshot has an option (Import Image Sequence) from File -> Import Image Sequence. Using this option you can select a directory with fles with common prefix name lets say IMG*.png and create Video based on the photos inside.

Linux create  video from images import image sequence Debian / Fedora and Ubuntu

On Ubuntu Linux or other distro where openmovieeditor is avialable install it with:

ubuntu:~# apt-get install –yes openmovieeditor

Openmovieeditor Linux create movies from images screenshot
To create a video out of pictures click on Media Browser tab. Choose the Folder with pictures from which video will be generated and drag them to the Video bar
(window).

To save produced video navigate to menus:

Project -> Render

and select format to save it as. One good codec to save output is Quicktime's. To convert later Quicktime MOV Video to MP4 video,
there is the  Pytube Media Converter script.

Well that's all enjoy your new videos from pictures 🙂

Converting JPEG Images to ASCII Art text (picture) in Microsoft Windows (2000 / XP / Vista / 7)

Friday, May 18th, 2012

A friend of mine, just mentioned about a program ASCIIPic – capable of converting graphic images in JPEG to plain text ASCII in Microsoft Windows OSes.
Yesterday I blogged about caca-utils (img2txt) – console tool to convert picture graphics to plain text ASCII , so knowing of the Windows freeware ASCIIPic existence catched my attention and I decided to give it a try to get idea what is situation with Images to ASCII text convertion in Windows? 🙂.

1. Generating ASCII from JPEG images with ASCII Pic

As I don't have a Microsoft Windows OS at hand, I downloaded it and run it on my Debian notebook with WINE (Wine Is Not an Emulator) MS-Windows emulator.

For my surprise the program run succesfuly its GUI interface and worked pretty smooth even emulated on Linux.

ASCII Pic 2.0 JPG PNG GIF to ASCII text MS Windows Convertor screenshot

As of time of writting, the latest version of the freeware program available is 2.0. You see in above screenshot the program is pretty intutive to use. You select an Input file, an Output file and you're ready to Process the image to TXT.
One small note to make here is the program couldn't recognize as Input files images in PNG or GIF formats, it seems the only image formats the program recognizes as input are JPEG and BMP.

ASCII Pic Windows image to ASCII program picture shot

The converted images to ASCII results are quite unsatisfactory, I tried converting few pictures originally in size 1024×768 but the produced ASCII was messy huge (the program didn't automatically set height / width dimensions to 60×80 and therefore, when I revied the produced pictures, they were very ugly and hardly readable. It could be the same image looks better if reviewed in MS-Windows Notepad but I seriously doubt that …

I thought some improvement to the produced ASCII image might be possible from the app options so I played around with the Zoom, Negation, Brightness and Monochrome options, none of them had a drastic change on the output. Using any of the program options didn't make the output TXT "image" to look closer riginal JPEGs..

ASCII Pic 2.0 Windows picture to ASCII Program options screenshot

ASCII Pic official website contains a number of other tiny tools, like WinKill and RemoteShut, however most of the tools are already too obslete and useless just like ASCII Pic

If I have to compare ASCIIPic produced ASCII Images to libcaca's Linux img2txt, asciipic's ASCII images are a piece of crap.

2. jp2a command line tool image to ASCII generator

As of time of writting a good alternative program I found for Windows is jp2a
jp2a is a free GPL-ed software available for all major operating system architectures Linux, BSD, Mac OS X, Windows.
jp2a is a command line tool and lacks any GUI interface but if compared to ASCII Pic the output ASCII image is awesome.

jp2a Windows binary can be downloaded from here , also I've made a mirror of windows jp2a bin in case if it disappears here

3. ASCII Generator 2 (asc2gen) – Windows GUI Images to ASCII generator

ASC 2 Gen is actually the best I can find program to convert images to ascii in Win as of time of writting.
Just like img2txt it generates pretty decent looking text images.

ASC2Gen failed to run emulated on my Linux host with wine version 1.0.1, hence to test it I used a a Windows host via teamviewer.

Below are few screenshots illustrating most of the options ASCII2GEN provides:

asc2gen Microsoft Windows image to ascii generator inverted penguins screenshot

asc2gen penguins in inverted color set (black color text background)

ASC2Gen backhead penguins ascii picture screenshot

ASC2GEN flipped backhed generated image to ASCII

ascii2gen generate images to ascii in colors Microsoft Windows shot

Picture to ASCII text converted with ASCII colors

Dithering Windows image to ascii text generated picture ASCII

ascii2gen dithering level option shot

asc2gen jpeg, png, gif to plain text ascii brightness contrast screenshot pic

asc2gen contrast / brigthness atune shot

ascii2gen penguins converted images to plain text inverted with capital letters for picture

asc2gen save as options shot

Something else nice is it supports a lot of image file formats as input including (BMP and GIF) images.
I've also made a mirror of asc2gen v. 2.0.0 here

While researching online, I found plenty of other Image to ASCII geneartors, however as I didn't tested them I can't say if they are  better ones.
Anyways I will be happy to hear if anyone knows other good ASCII generator alternative progs for Winblows?

Create PDF file from (png, jpg, gif ) images / pictures in Linux

Tuesday, September 14th, 2010

I’ve recently received a number of images in JPEG format as a feedback on a project plan that was constructed by a team I’m participating at the university where I study.

Somebody from my project group has scanned or taken snapshots of each of the hard copy paper feedback and has sent it to my mail.

I’ve received 13 images so I had to open them one by one to get each of the Project Plan to read the feedback on the page this was really unhandy, so I decided to give it a try on how to generate a common PDF file from all my picture files.

Thanksfully it happened to be very easy and trivial using the good old Image Magick

In order to complete the task of generating one PDF from a number of pictures all I did was.1. Switch to the directory where I have saved all my jpeg images

debian:~# cd /home/hipo/Desktop/my_images_directory/

2. Use the convert binary part of imagemagick package to generate the actual PDF file from the group of images

debian:~# convert *.jpg outputpdffile.pdf

If the images are numbered and contain many scanned pages of course you can always pass by all the images to the /usr/bin/convert binary, like for instance:

debian:~# convert 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg outputpdffile.pdf
Even though in my case I had to convert to PDF from multiple JPEG (JPG) pictures, convertion with convert is not restricted to convert only from JPEG, but you can also convert to PDF by using other graphical file formats.

For instance to convert multiple PNG pictures to a single PDF file the command will be absolutely the same except you change the file extension of the graphic files e.g.:

debian:~# convert 1.PNG 2.PNG 3.PNG 4.PNG 5.PNG OUTPUT-PDF-FILE.PDF

I was quite happy eventually to know Linux is so flexible and such a trivial things are able to be completed in such an easy way.