How to build Mac OS X services with Automator and shell scripting. I recently switched to Mac OS X as my primary desktop operating system after spending over a decade on Linux.
Although Apple's operating system supplies practically all of the command line tools I know and love, I want to spend less time in a terminal window and start cultivating workflows that integrate better with the Mac user experience. In my quest to tear the power of the command line out of the terminal, I have found that Apple's Automator tool is a powerful ally. Although it's not as mighty as the command line for improvisational automation, it's useful for defining stand-alone operations that you want to be able to repeat. I've used Automator over the past week to build simple applications that replace some of my personal shell scripts. One of the most compelling features of Automator is support for building services—headless applications that are pervasively accessible throughout the operating system. A trivial example The shell script action has a few simple options. Install FFMPEG on Mac. Afficher le sujet - comment patcher ffmpeg ? rgb2xyz and xyz2rgb.
19 ffmpeg commands for all needs. FFMpeg par l'exemple - Jean Cartier's Blog - Le site web de Jean Cartier avec des bouts de sa vie dedans. FFmpeg Howto. Table of Contents.
Install ffmpeg with xyz2rgb Video Filter. In order to add the xyz2rgb Video Filter to ffmpeg, you need to compile ffmpeg on your computer.
For this, you need also to compile some libraries ffmpeg depends on. You need to be acquainted with the utilisation of the Terminal and you may also need a good texteditor (like BBEdit). The following description is valid for Macintosh OSX 10.8 Prerequisites Go to AppStore and install XCodeOpen XCode and install the Commande Line tools (X Code Preferences:Downloads:Documentation) Install YASM Compiler, needed by.
Use ffmpeg for DCP to h.264 conversion. You can use ffmpeg to convert a movie to mpeg4.
We show it in multiple step, but you can convert it also in one step Put your DCP folder in a folder we will call work and prepare the folder cd work mkdir mov mkdir mov/jpg Identify the video stream MXF in the dcp folder. x264EncodingGuide – FFmpeg. x264 is a H.264/MPEG-4 AVC encoder.
The goal of this guide is to inform new users how to create a high-quality H.264 video. There are two rate control modes that are usually suggested for general use: Constant Rate Factor (CRF) or Two-Pass ABR. The rate control is a method that will decide how many bits will be used for each frame. This will determine the file size and also how quality is distributed. If you need help compiling and installing libx264 see one of our FFmpeg and x264 compiling guides. Constant Rate Factor (CRF) ¶ This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. 1. The range of the quantizer scale is 0-51: where 0 is lossless, 23 is default, and 51 is worst possible. Watermark - ffmpeg vfilters at specific timecodes.
Extracting an embedded subtitle from a video file using FFMPEG. Hi folks!
Have you ever used SuperSonic, the SubSonic fork? This is a video and music streaming platform written in Java. You can install it and configure it in order to manage you media collection. You should check it out and try it (it’s open source): There are lots of nice features that I’ll let you discover by yourself. However, it misses some things. Ok, I want to extract the subtitle and write them into an SRT formated file.
Fine ! Few Basics. Doc:media:imagemagick. Objet : retouche d'images en ligne de commande Commentaires : modifier format, ajouter des titres ou des encadrements à vos images numériques.
Introduction ImageMagick est un puissant outil en ligne de commandes pour la manipulation d'images. Il permet de rendre une quantité incroyable de services les plus variés, et peut servir de moteur à tout type d'interface graphique qui choisirait de s'appuyer sur lui pour devenir un nouveau The Gimp. Mais, même sans interface, ImageMagick n'en reste pas moins un formidable outil à utiliser, qui vous évitera de lancer des logiciels de retouche d'image complets pour réaliser de très simples et basiques opérations. Grâce à Imagemagick, vous disposerez notamment des fonctionnalités suivantes : Une fois installé, ImageMagick se pilote très facilement grâce à une série de lignes de commandes.
Images d'illustration pour ce tuto. ImageMagick - Octet.ca. Les exemples proviennent en grande partie de la fantastique page Examples of ImageMagick Usage.
ImageMagick: Command-line Tools: Convert. Create a video slideshow from images – FFmpeg. Frame rates ¶ Create a video (using the encoder libx264) from series of numerically sequential images such as img001.png, img002.png, img003.png, etc.
Important: All images in a series need to be the same size and format. You can specify two frame rates: The rate according to which the images are read, by setting -r before -i. Documentation : : This document describes filters, sources, and sinks provided by the libavfilter library.
Filtering in FFmpeg is enabled through the libavfilter library. In libavfilter, a filter can have multiple inputs and multiple outputs. To illustrate the sorts of things that are possible, we consider the following filtergraph. This filtergraph splits the input stream in two streams, then sends one stream through the crop filter and the vflip filter, before merging it back with the other stream by overlaying it on top. You can use the following command to achieve this: The result will be that the top half of the video is mirrored onto the bottom half of the output video. Filters in the same linear chain are separated by commas, and distinct linear chains of filters are separated by semicolons. The stream sent to the second output of , labelled as , is processed through the filter, which crops away the lower half part of the video, and then vertically flipped.
Invoke the command: DocJ2KCodec - openjpeg - Documentation for the JPEG 2000 codec - Open-source C-Library for JPEG 2000. Note : as of v2.0, OpenJPEG executables for JPEG 2000 compression and decompression are named opj_compress and opj_decompress, respectively. In OpenJPEG v1.x, they were named image_to_j2k and j2k_to_image. Following documentation is still valid for those using OpenJPEG 1.x executables. Description This program reads in an image of a certain type and converts it to a JPEG 2000 file. It is part of the OpenJPEG library. Usage opj_compress ...