Thanks for reply. Than which format can i use to record both audio and video using A20 processor
please reply -- Nithin On Monday, August 25, 2014 5:40:55 PM UTC+5:30, Jon Smirl wrote: > > Looks to me like you are trying to use software h.264 encoding on the > A20. The A20 is not fast enough to do that in software. In general > only desktop class x86 CPUs are fast enough to do that. The ALSA > overruns are because the CPU is too heavily loaded. > > Using a webcam with built in h.264 compression will avoid this problem. > http://www.logitech.com/en-us/product/hd-pro-webcam-c920?crid=34 > > Alternatively you could write some software and hook the A20's h.264 > encoding hardware into vlc, but no one has written that code yet. > > On Mon, Aug 25, 2014 at 2:13 AM, Nithin Chakravarthy > <[email protected] <javascript:>> wrote: > > I am trying to record videos with vlc from USB webcam from A20 humming > board > > The command i used to rercord with vlc > > Enter code here...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_pcmffmpeg -f alsa -r 16000 -i hw:2,0 -f > video4linux2 -s 800x600 -i /dev/video0 -r 30 -f avi -vcodec mpeg4 -vtag > xvid -sameq -acodec libmp3lame -ab 96k output.avi_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 to fix this error > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "linux-sunxi" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to [email protected] <javascript:>. > > For more options, visit https://groups.google.com/d/optout. > > > > -- > Jon Smirl > [email protected] <javascript:> > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
