====== Vidéo ======

  * [[/informatique/streaming_video|/informatique/streaming_video]]
  * [[/divers/copier_streaming_video|/divers/copier_streaming_video]]

===== Conversion de format =====

==== avconv ====

Bons articles:
  * http://www.thehelloworldprogram.com/web-development/encode-video-and-audio-for-html5-with-avconv/

Pour WEBM:
<code bash>
avconv -i the_video.mp4 the_video.webm
</code>
Mais c'est très lent, genre en temps réel ...

Pour FLV:
<code bash>
avconv -i the_video.mp4 -ar 44100 the_video.flv
</code>
Beaucoup (extrêmement) plus rapide que WEBM. Obligé d'indiquer audio_rate (-ar) sinon ne se lance pas, erreur : //Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented//

==== ffmpeg ====

<code bash>
ffmpeg -i file.avi output.mp4
ffmpeg -i file.avi -vcodec mpeg4 -f mpeg output.mp4
</code>

===== Web player =====

====Pour le web====

We need to encode our video with several different codecs so **that every browser can play** the one it likes. Codecs are a way to compress digital media. There are dozens of video codecs, but the ones you should know about for web videos are **H.264, vp8, and theora**. Each type of encoded videos is housed in a different type of container. Again, there are dozens of video containers, but for web videos you only need to know about **mp4, webm, and ogg**.

<code html>
 <video width="400" height="225" poster="img/quickfox.jpg" controls>
    <source src="video/quickfox.mp4" type="video/mp4" />
    <source src="video/quickfox.ogg" type="video/ogg" />
    <source src="video/quickfox.webm" type="video/webm" />
 </video>
</code>

===== Video.js =====

http://videojs.com/getting-started/