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@@ -1,16 +1,16 @@ # Voctomix -The [C3Voc](https://c3voc.de/) creates Lecture Recordings from German Hacker/Nerd Conferences. We have used [dvswitch](http://dvswitch.alioth.debian.org/wiki/) very successfully in the past but it has some serious limitations, which in 2014 we started looking for a replacement. We tested [snowmix](http://sourceforge.net/projects/snowmix/) and [gst-switch](https://github.com/timvideos/gst-switch) and while both did some things we wanted right, we realised that no existing tool would be able to fulfil all our whishes. Furthermore both are a nightmare to extend. So we decided to build our own Implementation of a Live-Video-Mixer. +The [C3VOC](https://c3voc.de/) creates lecture Recordings from German hacker/tech conferences. In the past wwe have used [dvswitch](http://dvswitch.alioth.debian.org/wiki/) very successfully but it has some serious limitations. Therefore we started looking for a replacement in 2014. We tested [snowmix](http://sourceforge.net/projects/snowmix/) and [gst-switch](https://github.com/timvideos/gst-switch) and while both did some things we wanted right, we realised that no existing tool would be able to fulfil all our whishes. Furthermore both are a nightmare to extend. So we decided to build our own Implementation of a Live-Video-Mixer. ## Subprojects -The Voctomix Project consists of three parts: +The Voctomix project consists of three parts: - [Voctocore](./voctocore/), the videomixer core-process that does the actual video- and audio crunching - [Voctogui](./voctogui/), a GUI implementation in GTK controlling the core's functionality and giving visual feedback of the mixed video - Voctomix [Example Scripts](./example-scripts/), a collection of tools and examples for talking to the core-process, feeding and receiving video-streams and controlling operations from scripts or command-line. ## Installation -Voctomix requires a fairly recent Version of GStreamer (at least 1.5, though we recommend 1.6 and later). This is natively present on [Debian Sid](https://packages.debian.org/sid/libgstreamer1.0-0) and [Ubuntu Wily](http://packages.ubuntu.com/wily/libgstreamer1.0-0). On these Systems it should run out of the Box and we recommend using one of them. A [Docker](http://www.docker.com) image that uses Ubuntu Wily as a base is bundled with Vocomix. Please refer to the seperate [readme](./README_DOCKER.md) how to use the Docker image. +Voctomix requires a fairly recent Version of GStreamer (at least 1.5, though we recommend 1.6 and later). This is natively present on [Debian Sid](https://packages.debian.org/sid/libgstreamer1.0-0) and [Ubuntu Wily](http://packages.ubuntu.com/wily/libgstreamer1.0-0). On these systems it should run out of the box. We recommend using one of them. A [Docker](http://www.docker.com) image that uses Ubuntu Wily as a base is bundled with Vocomix. Please refer to the seperate [readme](./README_DOCKER.md) how to use the Docker image. -Install the required Dependencies: +Install the required dependencies: ```` # Requirements apt-get install gstreamer1.0-plugins-bad gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly gstreamer1.0-tools libgstreamer1.0-0 python3 python3-gi gir1.2-gstreamer-1.0 gir1.2-gst-plugins-base-1.0 @@ -25,7 +25,7 @@ For the GUI you'll -- additionally to a gnome-desktop -- need to install the fol apt-get install gstreamer1.0-plugins-bad gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly gstreamer1.0-alsa gstreamer1.0-tools libgstreamer1.0-0 python3 python3-gi python3-gi-cairo gir1.2-gstreamer-1.0 gir1.2-gst-plugins-base-1.0 gir1.2-gtk-3.0 ```` -Now you should be able to clone the Git-Repository and run Voctomix or the GUI like this: +Now you should be able to clone the git-repository and run Voctomix or the GUI like this: ```` git clone https://github.com/voc/voctomix.git cd voctomix @@ -34,13 +34,13 @@ cd voctomix ```` ## Installation on Jessie -Because we are using Debian Jessie as our production system (which only has [1.4 packaged](https://packages.debian.org/jessie/libgstreamer1.0-0)), we are packaging the required Libraries in our own Debian Repository. The Packages inside this Repository are built against deb-multimedia.org, so to use them you should add the following lines to your `/etc/apt/sources.list`: +Because we are using Debian Jessie as our production system (which only has [1.4 packaged](https://packages.debian.org/jessie/libgstreamer1.0-0)), we are packaging the required libraries in our own Debian repository. The packages inside this repository are built against deb-multimedia.org, so to use them you should add the following lines to your `/etc/apt/sources.list`: ```` deb http://www.deb-multimedia.org jessie main non-free deb http://c3voc.de/voctomix jessie non-free ```` -You'll then need install the GPG-Keys: +You'll then need install the GPG keys: ```` apt-get update apt-get install deb-multimedia-keyring @@ -73,9 +73,9 @@ docker run -it --rm c3voc/voctomix help docker run -it --rm c3voc/voctomix examples ``` -## A word on CPU-Usage -Voctomix requires a fair amount of CPU-Time to run in the default configuration of 1920×1080 at 25fps. Our Production-Systems have these CPUs: `Intel Core i7-3770 CPU 4x 3.40GHz` but we're also experimenting with newer ones like these: `Intel Core i7-6700K, 4x 4.00GHz`. -For testing and development you may want to use a `config.ini` that reduces the resolution and also turns off the JPEG-Preview-Encoders, which take a huge amount of the required CPU-Power and are not required, as long as the GUI and the Core run on the same machine (or have a 10GE Link between them, FWIW). Don't forget to modify your source-scripts to provide the correct resolution. +## A word on CPU usage +Voctomix requires a fair amount of CPU time to run in the default configuration of 1920×1080 at 25fps. Our production systems have these CPUs: `Intel Core i7-3770 CPU 4x 3.40GHz` but we're also experimenting with newer ones like these: `Intel Core i7-6700K, 4x 4.00GHz`. +For testing and development you may want to use a `config.ini` that reduces the resolution and also turns off the JPEG preview encoders, which take a huge amount of the required CPU power and are not required, as long as the GUI and the Core run on the same machine (or have a 10GE Link between them, FWIW). Don't forget to modify your source scripts to provide the correct resolution. Such a config.ini might look like this: ```` @@ -88,9 +88,9 @@ videocaps=video/x-raw,width=320,height=180,framerate=25/1 ```` ## A word on running in a VM -While the Core runs fine inside any VM, the GUI uses OpenGL to display the Video-Streams. Don't forget to enable 3D Acceleration in your VM to support this. +While the Core runs fine inside any VM, the GUI uses OpenGL to display the video streams. Don't forget to enable 3D acceleration in your VM to support this. ## Contact To get in touch with us we'd ask to join `#voctomix` on the hackint IRC network, mail to `voc AT c3voc DOT de` or meet us on one of the [many conferences](https://c3voc.de/eventkalender) we're at. -You may also want to watch [a Presentation](https://media.ccc.de/v/froscon2015-1520-conference_recording_und_streaming#video) some of us gave about our Video-Infrastructure. +You may also want to watch [a presentation](https://media.ccc.de/v/froscon2015-1520-conference_recording_und_streaming#video) some of us gave about our video infrastructure. |