ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred

[NithinChakravarthi]

I am trying to record videos with vlc from USB webcam from A20 humming board
The command i used to rercord with vlc

vlc v4l2:///dev/video0 :v4l2-standard= :input-slave=alsa://hw:0,0 :v4l-caching=300 --sout="#transcode{vcodec=h264,vb=0,,scale=0,width=640,height=480,acodec=mpga,ab=128,channels=1,samplerate=44100}:standard{access=file,mux=mp4,dst=output00.mp4}"

Then it shows the following log

VLC media player 2.0.5 Twoflower (revision 11d59d1)
[0x19e88f0] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
QGtkStyle was unable to detect the current GTK+ theme.
x264 [info]: using cpu capabilities: ARMv6 NEON
x264 [info]: profile High, level 3.0
x264 [info]: using SAR=8/9
x264 [info]: using cpu capabilities: ARMv6 NEON
x264 [info]: profile High, level 3.1
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
x264 [warning]: invalid DTS: PTS is less than DTS
x264 [warning]: invalid DTS: PTS is less than DTS
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
x264 [warning]: invalid DTS: PTS is less than DTS
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
x264 [warning]: invalid DTS: PTS is less than DTS
x264 [warning]: invalid DTS: PTS is less than DTS
x264 [warning]: invalid DTS: PTS is less than DTS
x264 [info]: frame I:1 Avg QP:26.57 size: 6875
x264 [info]: frame P:23 Avg QP:26.23 size: 2067
x264 [info]: frame B:28 Avg QP:27.09 size: 1103
x264 [info]: consecutive B-frames: 1.9% 76.9% 5.8% 15.4%
x264 [info]: mb I I16..4: 39.8% 55.7% 4.5%
x264 [info]: mb P I16..4: 4.3% 1.0% 0.0% P16..4: 55.7% 2.7% 2.4% 0.0% 0.0% skip:34.0%
x264 [info]: mb B I16..4: 0.8% 0.2% 0.0% B16..8: 31.8% 0.0% 0.0% direct: 2.8% skip:64.3% L0:62.6% L1:36.1% BI: 1.2%
x264 [info]: 8x8 transform intra:33.8% inter:95.1%
x264 [info]: coded y,uvDC,uvAC intra: 16.3% 41.8% 3.6% inter: 7.7% 28.2% 0.0%
x264 [info]: i16 v,h,dc,p: 11% 16% 9% 64%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 12% 34% 13% 3% 3% 4% 8% 10%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 14% 24% 13% 1% 2% 1% 10% 11%
x264 [info]: i8c dc,h,v,p: 70% 18% 10% 2%
x264 [info]: Weighted P-Frames: Y:8.7% UV:8.7%
x264 [info]: ref P L0: 47.7% 7.3% 30.5% 14.5%
x264 [info]: ref B L0: 50.1% 46.5% 3.4%
x264 [info]: ref B L1: 88.3% 11.7%
x264 [info]: kb/s:787.41

video is recording fine but without sound. it says Alsa lib sound overrun occured.
please help me to fix this error

[Rémi Denis-Courmont]

Please update.

[NithinChakravarthi]

what should i update

[NithinChakravarthi]

I have tried recording with vcodec=mpeg2 and acodec=mpga but i got differen message log

VLC media player 2.0.5 Twoflower (revision 11d59d1)
[0x45d8f0] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
QGtkStyle was unable to detect the current GTK+ theme.
ALSA lib pcm.c:7339:(snd_pcm_recover) overrun occurred
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow
[mpeg2video @ 0x521240] rc buffer underflow

how can i avoid buffer underflow?
please help me with some solution

[Rémi Denis-Courmont]

VLC 2.0.5 is not supported anymore.

[NithinChakravarthi]

so vlc 2.0.5 is not supported for recording?
or
it is not supported for recording with mpeg2 codec

[Fredo_p]

VLC 2.0.5 is not supported anymore.

I believe what Remi might have meant was that v2.0.5 is no longer supported. This may be due to the fact that 2.0.5 is an old version and the current is 2.1.5 for Linux.

Like you, I'm a Linux user as well (Lubuntu). So you may want to head on over the the Linux forums of your OS and ask when a dev package will be available or how to build your own.

Might I suggest looking in the Linux testing site and search to see if v2.1.5 has a testing package. If there is one, then download and test the hell out of it so a release can be made sooner than later.