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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (48)
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
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AppRTC : Google’s WebRTC test app and its parameters
23 juillet 2014, par silviaIf you’ve been interested in WebRTC and haven’t lived under a rock, you will know about Google’s open source testing application for WebRTC : AppRTC.
When you go to the site, a new video conferencing room is automatically created for you and you can share the provided URL with somebody else and thus connect (make sure you’re using Google Chrome, Opera or Mozilla Firefox).
We’ve been using this application forever to check whether any issues with our own WebRTC applications are due to network connectivity issues, firewall issues, or browser bugs, in which case AppRTC breaks down, too. Otherwise we’re pretty sure to have to dig deeper into our own code.
Now, AppRTC creates a pretty poor quality video conference, because the browsers use a 640×480 resolution by default. However, there are many query parameters that can be added to the AppRTC URL through which the connection can be manipulated.
Here are my favourite parameters :
- hd=true : turns on high definition, ie. minWidth=1280,minHeight=720
- stereo=true : turns on stereo audio
- debug=loopback : connect to yourself (great to check your own firewalls)
- tt=60 : by default, the channel is closed after 30min – this gives you 60 (max 1440)
For example, here’s how a stereo, HD loopback test would look like : https://apprtc.appspot.com/?r=82313387&hd=true&stereo=true&debug=loopback .
This is not the limit of the available parameter, though. Here are some others that you may find interesting for some more in-depth geekery :
- ss=[stunserver] : in case you want to test a different STUN server to the default Google ones
- ts=[turnserver] : in case you want to test a different TURN server to the default Google ones
- tp=[password] : password for the TURN server
- audio=true&video=false : audio-only call
- audio=false : video-only call
- audio=googEchoCancellation=false,googAutoGainControl=true : disable echo cancellation and enable gain control
- audio=googNoiseReduction=true : enable noise reduction (more Google-specific parameters)
- asc=ISAC/16000 : preferred audio send codec is ISAC at 16kHz (use on Android)
- arc=opus/48000 : preferred audio receive codec is opus at 48kHz
- dtls=false : disable datagram transport layer security
- dscp=true : enable DSCP
- ipv6=true : enable IPv6
AppRTC’s source code is available here. And here is the file with the parameters (in case you want to check if they have changed).
Have fun playing with the main and always up-to-date WebRTC application : AppRTC.
UPDATE 12 May 2014
AppRTC now also supports the following bitrate controls :
- arbr=[bitrate] : set audio receive bitrate
- asbr=[bitrate] : set audio send bitrate
- vsbr=[bitrate] : set video receive bitrate
- vrbr=[bitrate] : set video send bitrate
Example usage : https://apprtc.appspot.com/?r=&asbr=128&vsbr=4096&hd=true