bash
How to refresh an application with bash: useful for Twitter clients
If you have the necessity to refresh or reload every a specified time an application that doesn't have this feature, you can adapt my bash script to your duties. Indeed it allows you to kill and reload an application in the same position after a fixed interval of time. I wrote it to refresh every 10 minutes the timeline of Corebird a third-party twitter client.
How to stabilize a video using FFmpeg and vid.stab
Recently I have refurbished my HTC Re Camera, an old instant camera, because I wanted to make some videos. The results were very devastating: I discovered that I have a shaky hand! Fortunately there are FFmpeg and vid.stab that helped me to stabilize them. In this post I explain how to install this plugin and use it, then showing two comparison videos.
An improved bash script to shuffle files and the MP3 tags too
The script removes empty spaces and special characters (i.e. ', " and -) from a directory of defined files and then it shuffles them by adding a random number followed by an underscore. For the MP3 files it mixes-up also the ID3 tags and it has a special feature to add them if missing, starting from the filename (only if it is renamed like this: Album_name-Artist_name-Title_name.mp3 or Artist_name-Title_name.mp3).
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How to shuffle slyly a list of file with a bash script
I present a little bash script to change the alphabetical order in a specified or working folder of files, simply adding a random prefix and checking that the resulting one differs from a fixed number of previous elements. I wrote it to shuffle a list of songs that I usually listen to my poor car radio, but I think that it could be useful also for presentation of a series of pictures via usb pen and a TV. In addition this script has a clean option that can rename the files to the original version, useful for make another mix.
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Locate large files or directories on Linux with bash
From a discussion on Super User, I have discovered an awesome tool that helps you to locate the largest files or directories in your computer, just typing a single command line on a bash terminal. I have only added some code to create a text file without the annoying message "Permission denied". In the article there is also a list of the most famous analyzers for linux.
A bash script to convert the color palette of a PDF into CMYK
It happens that you have to print for job or personal pleasure, one or more posters in a big format and like me you don't use famous commercial software and you aren't a professional illustrator. But how can the color palette of your document fit the request of the typography? This post tries to show a simple conversion of a PDF from RGB to CMYK, using ghostscript library and imagemagick in a handy bash script.
How to cut and join a MP4 video in four steps using ffmpeg
How many times do we have to fix a video removing the parts that we don’t need? There are a lot of video editing programs that solve this elementary issue, including great open source ones, but generally, they require processing the video and audio streams and so a lot of resources. FFmpeg and the command-line can cut and join the video in four steps copying the same video and audio codec even on an MP4 video encoded in h.264 and AAC.
A bash script multi-tool and easy editable
I happen very often to convert/resize/rename a directory of files, so sometimes I can fix manually file by file or if there are many of the ones, I can modify an existent bash for accelerating the process. However it is a waste of time the changing the whole file to adapt it at the new commands (hazards are always lurking!).
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PDF2CBZ for a better legibility on eReader
I admit it: my ebook reader has many problem in loading some type of PDFs, though I had made various tricks to fix this problem, like my site can testify! In last days I have tried a new approach, the conversion to CBZ, a type of archive file for the purpose of sequential viewing of images especially comic books. And for now, it works!
Script to add bookmarks and toc in PDFs
In the previous article I explain how to insert toc and/or bookmarks using LaTeX in a PDF document, omitting a very boring aspect: selection and writing of all parts that you want insert in these ones (avoiding errors when the items are very numerous!). In order to automate this procedure, I wrote a small bash script that converts the output made by JPDFBookmarks in a text file pasteable in LaTeX.
