Dear all Ok, thanks for your reply. So I will switch my mattarhorn installation on to a stronger machine.
g stefan Am Donnerstag, den 15.09.2011, 09:06 -0600 schrieb Greg Logan: > On 11-09-15 05:57 AM, Ruediger Rolf wrote: > > Hi again! > > > > Am 15.09.2011 12:32, schrieb stefan braun: > >> Hi Rüdiger > >> > >> Am Donnerstag, den 15.09.2011, 12:20 +0200 schrieb Ruediger Rolf: > >>> Hi Stefan, > >>> > >>> I guess your computer is simply too slow. you have a 2.2 Ghz single or > >>> dual core processor? > >> yes, single core cup. > > Could be enough for a single stream. > >> > >>> Have you check how the CPU load is during recording? > >> cpu load is on 100%. > > This should not exceed 90% otherwise you will always loose frames and sync. > >> > >>> With firewire you will gt quite a lot data that needs to be encoded. > >>> TV-cards are much more CPU friendly in my experience. The Hauppauge card > >>> even do hardware compression. > >>> > >>> What version of Matterhorn do you use? > >> version 1.1. > >> > >>> There were quite some fixes that > >>> improved performance since version 1.1. The confidence monitoring patch > >>> in trunk since last week will give an additional performance boost if > >>> you are using epiphan vga2usb devices. > >>> > >>> Why don't you try to use the Firewire input as an Audio input too? Then > >>> you will have at least one device less to capture from and audio and > >>> video will probably stay in better sync. > >>> > >>> Rüdiger > >> So you recommend me to use a stronger pc or/and two switch to matterhorn > >> 1.2. > > A single core with 2,2 Ghz will not be enough for a two stream recording > > with 1.2 I would guess. > > A single core would probably be insufficient for one stream. We average > (depending on the settings) at 50% load on a dual core 2.5GHz for two > video streams with mpeg2 last I checked. Switching to x264 brings that > up even higher. A single core just isn't going to have the power to > encode, unless you have it capturing at very low framerates and quality. > > G > > >> Thanks > >> stefan > >> > >>> Am 15.09.2011 12:07, schrieb stefan braun: > >>>> Dear Community > >>>> > >>>> The recording on my CA is working pretty fine: VGA grab, DV camera and > >>>> ALSA audio everything ok. But when I watch the video it is lagging: The > >>>> first three seconds look good, like a fluid film should looking like. > >>>> After this time, the video is frozen, then it follows a short fluid > >>>> phase again ... and so on. The same with the VGA grab video. The audio > >>>> file is ok, it has constant speed. > >>>> > >>>> The CA has an 2.2 Ghz CPU and 8 GB RAM, but in the install-script I > >>>> allowed only 2 GB for matterhorn to use. Where can I increment the > >>>> memory use for matterhorn? > >>>> > >>>> Here are my device specifications of the CA config file (I set the > >>>> buffer size quite high, I hoped it will help but it didn't): > >>>> > >>>> # name definition?? > >>>> capture.device.names=ALSA,DV_1394,VGA > >>>> > >>>> #Create the screen capture > >>>> capture.device.VGA.type=EPIPHAN_VGA2USB > >>>> capture.device.VGA.flavor=presentation/source > >>>> capture.device.VGA.outputfile=VGA.mpg > >>>> capture.device.VGA.src=/dev/video0 > >>>> capture.device.VGA.framerate=15 > >>>> > >>>> #create dv_capture > >>>> capture.device.DV_1394.type=DV_1394 > >>>> capture.device.DV_1394.outputfile=dv_1394.mpg > >>>> capture.device.DV_1394.flavor=presenter/source > >>>> capture.device.DV_1394.src=/dev/video0 > >>>> capture.device.DV_1394.codec=ffenc_mpeg2video > >>>> capture.device.DV_1394.codec.bitrate=2000000 > >>>> capture.device.DV_1394.framerate=25 > >>>> capture.device.DV_1394.buffer.size=1000 > >>>> > >>>> #Create the audio capture > >>>> capture.device.ALSA.type=ALSASRC > >>>> capture.device.ALSA.flavor=presenter/source > >>>> capture.device.ALSA.outputfile=Alsa.mp3 > >>>> > >>>> Do you have any recommendations for a good/working device specification > >>>> to solve my "lagging" problem? > >>>> > >>>> Thanks for your answers > >>>> stefan > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> Matterhorn-users mailing list > >>>> [email protected] > >>>> http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > >>>> > >>> > >> > > > > > > > _______________________________________________ > Matterhorn-users mailing list > [email protected] > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users _______________________________________________ Matterhorn-users mailing list [email protected] http://lists.opencastproject.org/mailman/listinfo/matterhorn-users
