That may well be the cause, but I don't see how. I was testing the unsynchronization between the presenter and the presentation a while ago and I used a laptop playing a video in a loop. Never had problems to process the videos.
2012/4/12 Jack Vant <[email protected]> > The lectures we've had problems with here are an hour and 15 minutes > and the professor does Powerpoint and YouTube videos. I can't give an > exact slide count, but I can ask her for an average. It may well be > that the YouTube videos are the cause of the problems we see, > > On Thu, Apr 12, 2012 at 9:34 AM, Christopher Brooks > <[email protected]> wrote: > > How long of a presentation? > > > > Chris > > > > > >> We also discovered a problem with long presentations with lots of > >> slides in a late 1.3 beta - I think it may affect 1.2 (it was fixed > >> for the 1.3 release). Basically when the workflow gets to create the > >> segmented video it requests the md5 sum of the file * the number of > >> segments. The md5 was being calculated (it wasn't stored) causing the > >> cp on the admin node to max out and the service to become > >> unresponsive ... > >> > >> D > >> > >> On 04/11/2012 07:39 PM, Jack Vant wrote: > >> > We have five machines involved in our Matterhorn installation, an > >> > admin machine, a worker that does the encoding, a dedicated engage > >> > server and 2 streaming servers behind a load balancer. We do use > >> > shared (nfs mounted) storage. We are version 1.2. What do you mean > >> > by "have been build with the > >> >> workspace --rather than the workspace-stub -- profile"? > >> > 2012/4/11 Rubén Pérez<[email protected]>: > >> >> In some cases there are problems with files bigger than 2GB. > >> >> Sometimes those errors are avoidable, sometimes aren't. I > >> >> corrected myself a couple of bugs in the WorkingFileRepository > >> >> service (I think that was the part, but at least it was related), > >> >> which directly affected the processing of videos (trimming them to > >> >> 2GB if they were bigger). This is fixed in trunk, but did not make > >> >> it to 1.3 . > >> >> > >> >> I wonder which version are you using and if *all* the machines in > >> >> your setup use a shared drive to process the videos (and have been > >> >> build with the workspace --rather than the workspace-stub -- > >> >> profile). > >> >> > >> >> Regards > >> >> > >> >> 2012/4/11 Jack Vant<[email protected]> > >> >>> We have a professor here who utilizes Powerpoint presentations > >> >>> with large numbers of slides and imbedded in the presentations > >> >>> are youtube videos, so the track for the presentation video is > >> >>> quite large, 1.2 gigs on average. Several of her captures have > >> >>> failed during processing and reingestion fails and the mpg for > >> >>> the presenter computer is blamed. The last two lectures for this > >> >>> class processed just fine but the last 10 minutes of one lecture > >> >>> and the last 5 minutes are not viewable, the video freezes and > >> >>> the audio along with it. These lectures are an hour and 15 > >> >>> minutes. Have we hit some threshold? > >> >>> > >> >>> -- > >> >>> Jack Vant > >> >>> System Engineer - Unix > >> >>> Office of Information Technology > >> >>> Boise State University > >> >>> 208-426-4446 > >> >>> 208-863-0031 > >> >>> _______________________________________________ > >> >>> 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 > > > > > > > > -- > > Christopher Brooks, BSc, MSc > > ARIES Laboratory, University of Saskatchewan > > > > Web: http://www.cs.usask.ca/~cab938 > > Phone: 1.306.966.1442 > > Mail: Advanced Research in Intelligent Educational Systems Laboratory > > Department of Computer Science > > University of Saskatchewan > > 176 Thorvaldson Building > > 110 Science Place > > Saskatoon, SK > > S7N 5C9 > > _______________________________________________ > > Matterhorn-users mailing list > > [email protected] > > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > > > > -- > Jack Vant > System Engineer - Unix > Office of Information Technology > Boise State University > 208-426-4446 > 208-863-0031 > _______________________________________________ > Matterhorn-users mailing list > [email protected] > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users >
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