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--- logiciels:screencast:accueil [2014/11/03 23:14]
resonance créée
+++ logiciels:screencast:accueil [2018/01/22 11:14] (Version actuelle)
resonance ancienne révision (2016/10/20 16:46) restaurée
@@ Ligne 1: / Ligne 1: @@
 ====== Screencast audio/vidéo ======
-Essayer Kazam + gtk-recordmydesktop
+Enregistrement audio et vidéo de ce qu'il se passe sur l'ordinateur.
+<WRAP center round tip 60%>Solutions sur Linux</WRAP>
+Essayer avant toute chose avec Kazam ou gtk-recordmydesktop ou http://www.maartenbaert.be/simplescreenrecorder/
+Autre ressource sur [[http://forum.pdpatchrepo.info/topic/9722/screencast-your-patch|Screencast your patch]].
 ===== Installation =====
 Screencast audio/video \\
-(ffmpeg for video, vlc for audio, jack and pulse audio to connect Pure Data to vlc)
+([[logiciels:ffmpeg:accueil|ffmpeg]] for video, vlc for audio, jack and pulse audio to connect Pure Data to vlc)
@@ Ligne 21: / Ligne 28: @@
 ===== Script Linux =====
-<code sh>
+<code bash>
 #!/bin/bash
 # Script to screencast audio and video (ffmpeg for video, vlc for audio, jack and pulse audio to connect Pure Data to vlc)
@@ Ligne 78: / Ligne 85: @@
 </code>
+==== Gif animé ====
+  * http://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast
+<code> byzanz-record --duration=15 --x=200 --y=300 --width=700 --height=400 out.gif</code>
+{{:logiciels:screencast:out.gif?nolink|}}
+==== Ffmpeg/Jack à essayer ====
+Source : http://lists.puredata.info/pipermail/pd-list/2014-11/108461.html
+<code>ffmpeg -f jack -ac 2 -i ffmpeg -f x11grab -r 25 -s 1366x768 -i :0.0 -acodec pcm_s16le -threads 0 output.mkv</code>
+Notice that:
+  * ffmpeg in my case is the 'original' one compiled by hand. Unfortunately debian now seems to only package avconv and that has always crashed on me with jack as audio input. However ffmpeg is relatively easy to compile on debian following this guide: https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
+  * You should play with the -s and -i parameters to suit your needs.
+  * Pulseaudio will be automatically suspended when you run jack (I was forced to install it to use skype with, alas, I'm forced to use for work).
+  * Clearly when screen-casting it'll be difficult to get Chuck Norris low latencies without some xruns.
+  * The output with that ffmpeg command will be a very good quality mkv video however it will also be very (very!) big and you'll have to factor in the extra time for re-compressing (it's possible to encode on the fly -but I prefer to have a good quality 'original')
+  * For encoding I've had rather nice results with using webem, for example (YMMV):
+<code>ffmpeg -y -i "$INFILE" -threads 8 -f webm -vcodec libvpx -g 120 -level 216 -profile 0 -qmax 42 -qmin 10 -rc_buf_aggressivity 0.95 -vb 2M -acodec libvorbis -aq 90 -ac 2 $OUTFILE</code>
+----
 ===== Liens =====
   * http://wiki.linuxaudio.org/wiki/screencasttutorial
   * http://puredata.info/docs/JackRoutingMultichannelAndBrowserAudio/
   * http://askubuntu.com/questions/4428/how-to-create-a-screencast
-  * http://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast

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