Hi all,
During preliminary testing of a 2h 15m capture (which we intend to post
produce for YouTube), UC Berkeley discovered that the capture files for
video and screen were off by 15m (with the screen capture via Epiphan
being 15m short), which is more or less unacceptable to our post
production folks (as it is very difficult for them to stitch this back
together). This is likely to be due to dropped frame rate, but it is a
bit difficult to confirm.
I am wondering if anyone else (besides Saskatchewan folks, who confirmed
this issue) has encounter this issue and how they are working around it.
I imagine that lowering framerates and bitrates would work, though some
initial testing using various capture agent configurations seems to
suggest that the capture files are still off by a few minutes even with
the CPUs being not fully taxed.
We are using the reference capture agent hardware and very basic capture
agent settings. This issue has been filed in MH Jira if anyone is
interested:
http://opencast.jira.com/browse/MH-8505
Finally, we have heard that there are various hardware and configuration
setups for Matterhorn Capture Agents in production. I think it would be
great if that we, as a community, can share this information (via the MH
wiki) to help each other understand and learn about the various use
cases and setups that are employed.
Thanks,
--
Kevin Chan
Operations Team
Educational Technology Services
UC Berkeley
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