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http://opencast.jira.com/browse/MH-8655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=29490#comment-29490
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Andreas Krieger commented on MH-8655:
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Actual Results: corrupted recording as described above and by attached
screenshot
Expected Results: the recording to follow the resolution changes by rescaling
the resolutions correctly and thus provide consistent quality
Workaround (if any):
+ use a scaler (which has it's own limitation, like not delivering an output
signal if the input is running on 100Hz)
+ disconnect the source and reconnect it (but this would mean to know that this
is necessary, which is only possible via confence monitoring)
+ every workaround has it's own traps and requires additional instruction and
setup of the lectures and thus more fail-prone than an internal solution
We currently have quite a lot of recordings failing due to this reason, so a
solution to this would be highly welcome.
I have little to no idea of the internals, but what about identifying the
"offending" resolution changes, and then checking like every 5 seconds whether
such a resolution change (from which to what) happened, and then adapting the
scaling function accordingly during the recording?. Easy said, I know. Or what
about causing a software interrupt to the epiphan device every time a
resolution changes, thus causing a short signal loss, thus mitigating the
effect?
> Epiphan capture gets corrupted when the resolution of the presentation
> changes without disconnecting the signal
> ---------------------------------------------------------------------------------------------------------------
>
> Key: MH-8655
> URL: http://opencast.jira.com/browse/MH-8655
> Project: Matterhorn Project
> Issue Type: Bug
> Components: Capture (Devices and Software)
> Affects Versions: 1.3, 1.2
> Reporter: Andreas Krieger
> Priority: Critical
> Attachments: failed_recording_1.png
>
>
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