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. > Have you check how the CPU load is during recording? cpu load is on 100%. > > 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. 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
