Re: [LAU] screencasting with ffmpeg

On Fri, Nov 5, 2010 at 3:08 PM, Jeremy Jongepier <jeremy(a)autostatic.com> wrote: Makes no diff: Another session manager is already running is the error Yes the keybd options cause problems sometimes and sometimes not Well!! Out here man Xephyr gives me hardly one screenful: the only options mentioned are screen parent and host-cursor. It however says its like xnest. So install Xnest and look at its man page. No keybd options there either. But it says see Xserver. So I see Xserver. Nothing there either Anyway for now I am dropping the keybd and session call and that runs. Script is: #!/bin/bash #set -x # Set up nested X server Xephyr -ac -screen 1024x768x16 -host-cursor -br -reset -terminate 2> /dev/null :2 & sleep 3 export DISPLAY=:2.0 #xfce4-session& I am now at the point of calling the second script. The jack_capture is giving its own share of problems so try to only get video with the ffmpeg call #!/bin/bash DATE=`date +%Y%m%d` TIME=`date +%Hh%M` export DISPLAY=:2.0 # Start screencast #xterm -display :0.0 -e jack_capture -b 24 $HOME/screencast/screencast_audio_$DATE-$TIME.wav & ffmpeg -an -f x11grab -r 30 -s 1280x720 -i :2 -vcodec libx264 -vpre lossless_ultrafast -threads 4 $HOME/screencast/screencast_video_$DATE-$TIME.mkv #killall jack_capture Error I get is [x11grab @ 0x9e04c30] device: :1 -> display: :1 x: 0 y: 0 width: 1280 height: 720 [x11grab @ 0x9e04c30] shared memory extension found X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 130 (MIT-SHM) Minor opcode of failed request: 4 (X_ShmGetImage) Serial number of failed request: 11 Current serial number in output stream: 11 [1]+ Segmentation fault Xephyr -ac -screen 1024x768x16 -host-cursor -br -reset -terminate :2 2> /dev/null As far as I know I am not using gnome (now). At initial gdm login I choose xfce rather than gnome session