Xuggler: error using to convert video from .mp4 to .webm - xuggler

I got following error while using Xuggler to convert a video from mp4 to webm
3:02:27,344 ERROR [status_jsp:665] java.lang.RuntimeException: could not open stream com.xuggle.xuggler.IStream#1423372160[index:0;id:0;streamcoder:com.xuggle.xuggler.IStreamCoder#1423442272[codec=com.xuggle.xuggler.ICodec#1423293632[type=CODEC_TYPE_AUDIO;id=CODEC_ID_VORBIS;name=libvorbis;];time base=1/44100;frame rate=0/0;sample rate=44100;channels=2;];framerate:0/0;timebase:1/90000;direction:OUTBOUND;]: Operation not permitted
java.lang.RuntimeException: could not open stream com.xuggle.xuggler.IStream#1423372160[index:0;id:0;streamcoder:com.xuggle.xuggler.IStreamCoder#1423442272[codec=com.xuggle.xuggler.ICodec#1423293632[type=CODEC_TYPE_AUDIO;id=CODEC_ID_VORBIS;name=libvorbis;];time base=1/44100;frame rate=0/0;sample rate=44100;channels=2;];framerate:0/0;timebase:1/90000;direction:OUTBOUND;]: Operation not permitted
at com.xuggle.mediatool.MediaWriter.openStream(MediaWriter.java:1192)
at com.xuggle.mediatool.MediaWriter.getStream(MediaWriter.java:1052)
at com.xuggle.mediatool.MediaWriter.encodeAudio(MediaWriter.java:830)
at com.xuggle.mediatool.MediaWriter.onAudioSamples(MediaWriter.java:1441)
at com.xuggle.mediatool.AMediaToolMixin.onAudioSamples(AMediaToolMixin.java:89)
at com.xuggle.mediatool.MediaReader.dispatchAudioSamples(MediaReader.java:628)
at com.xuggle.mediatool.MediaReader.decodeAudio(MediaReader.java:555)
at com.xuggle.mediatool.MediaReader.readPacket(MediaReader.java:469)
at com.test.xuggler.Test.processAction(Test.java:26)

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ALSA lib ../../../alsa-lib-1.1.0/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave

OS: NXP in yocto(arm embedded)
ON_RECOGNIZING_SPEECH_FINISHED:
{u'text': u'who are you'}
ALSA lib ../../../alsa-lib-1.1.0/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
[ERROR:audio_output_stream.cc(61)] Device could not be opened: default
ON_RESPONDING_STARTED:
{u'is_error_response': False}
[3950:3981:ERROR:audio_output_stream.cc(121)] An error occurred when playing audio output
ON_RESPONDING_FINISHED
ON_RESPONDING_STARTED:
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ALSA lib ../../../alsa-lib-1.1.0/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
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i really don't know how to solve..

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I would like to use the webcam of my old laptop (my laptop is a Packard Bell EasyNote MX37) in order to do streaming video.
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cvlc v4l2:///dev/video0 :v4l2-standard= :input-slave=alsa://hw:0,0
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[0x7f1................] main access out error: socket bind error (Permission denied)
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[0x7f1................] main input error: cannot start stream output instance, aborting
Thanks a lot for your help!
PS: The goal is to keep an eye on my parking space.
Just like the error message says, VLC is not allowed to open the port you specified. This might be because it is already in use by another app on your OS or because your user account simply does not have the rights needed to open a port. Consider using a different port like 32000, etc.

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I am trying to record audio with the PS Eye on a raspberry pi model b plus (I have tried with older b models and the same issue occurs as below).
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Found hardware: "USB-Audio" "USB Mixer" "USB1415:2000" "" ""
Hardware is initialized using a generic method
No state is present for card CameraB409241'...amixer: Mixer hw:1 load error: Invalid argument
amixer: Mixer hw:1 load error: Invalid argument
amixer: Mixer hw:1 load error: Invalid argument
amixer: Mixer hw:1 load error: Invalid argument
amixer: Mixer hw:1 load error: Invalid argument
...
done.
The problem seems to be the controls definition of the PS Eye. I would like to know the following:
Where does alsamixer load the controls for a particular device from? Are they in the driver?
Is there a way to increase the mic volume another way?
I am not using Pulseaudio yet but will try it if I can't fix this in alsa.
thanks
Sytem logs:
Without pulseaudio installed, neither restarting alsa or trying to open the controls in alsamixer produce anything in the system log. If pulse audio is installed however, trying to open the controls in alsamixer gives:
Oct 30 10:21:26 signaler pulseaudio[19000]: [pulseaudio] alsa-util.c: Unable to load mixer: Invalid argument
Oct 30 10:21:27 signaler pulseaudio[19000]: [pulseaudio] server-lookup.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
Oct 30 10:21:27 signaler pulseaudio[19000]: [pulseaudio] main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11