Vokoscreen не работает на Ubuntu 14.04

Я пытался заставить его работать на Ubuntu 14.04, но не повезло. Как я могу исправить ошибку?

Полные журналы запуска VokoScreen с терминала

vokoscreen 

[vokoscreen] Locale: "en_US" 
[vokoscreen] Version: "1.9.0" 
[vokoscreen] Qt Version:  4.8.6 
[vokoscreen] asoundlib Version: "1.0.27.2" 

[vokoscreen] ---Begin Search external tools--- 
[vokoscreen] "/usr/bin/ffmpeg" is a link and pointing to "/opt/ffmpeg/bin/ffmpeg" 
[vokoscreen] Find pactl 
[vokoscreen] Find mkvmerge 
[vokoscreen] ---End search external tools--- 

[vokoscreen] ---Begin search Videoplayer--- 
[vokoscreen] Find Videoplayer : "/usr/bin/avplay" 
[vokoscreen] Find Videoplayer : "/usr/bin/ffplay" 
[vokoscreen] Find Videoplayer : "/usr/bin/smplayer" 
[vokoscreen] Find Videoplayer : "/usr/bin/totem" 
[vokoscreen] Find Videoplayer : "/usr/bin/vlc" 
[vokoscreen] ---End search Videoplayer--- 

[vokoscreen][Regional selection] Frame locked: false 

[vokoscreen] ---Begin search PulseAudio Plugin--- 
[vokoscreen] Found file .asound for PulseAudio Plugin 
[vokoscreen] ---End search PulseAudio Plugin--- 


[vokoscreen] ---Begin Pulse unload Module--- 
[vokoscreen] ---End Pulse unload Module--- 

[vokoscreen] ---Begin search Alsa capture device--- 
[vokoscreen] alsa_device_sample() in alsadevice.c: open audio device hw:0,0 (Success)
[vokoscreen] alsa_device_sample() in alsadevice.c: Samplerate = 44100
[vokoscreen] Find CaptureCard: "[hw:0,0] HDA Intel PCH" 
[vokoscreen] alsa_device_sample() in alsadevice.c: cannot open audio device hw:1,3 (No such file or directory)
[vokoscreen] Find CaptureCard: "[hw:1,3] HDA NVidia" 
[vokoscreen] ---End search Alsa capture device--- 

[vokoscreen] ---Begin search PulseAudio Capture Devices--- 
[vokoscreen] Find CaptureCard: "Monitor of GF108 High Definition Audio Controller Digital Stereo (HDMI)" with device: "alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor" 
[vokoscreen] Find CaptureCard: "Monitor of Built-in Audio Analog Stereo" with device: "alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" 
[vokoscreen] Find CaptureCard: "Built-in Audio Analog Stereo" with device: "alsa_input.pci-0000_00_1b.0.analog-stereo" 
[vokoscreen] ---End search PulseAudio Capture Devices--- 

[vokoscreen] ffmpegcommand : " -f x11grab -r 25 -s 1366x768 -i :0.0+0,0 -pix_fmt yuv420p -vcodec mpeg4 -ar 48000 -qscale 1 -r 25 /tmp/vokoscreen-vokoscreen/vokoscreen-2014-05-03_22-09-34.mkv" 

[vokoscreen] ffmpeg is not running 
[vokoscreen][Regional selection] Frame locked: false 

The process could not be started. Either the is called program is not installed, or the ffmpeg or avconv call Faulty or you have not over sufficient permissions to to the program.