Opencast 16 - Editor no sound/audio

[s.la...@googlemail.com]

Hi,

we upgraded to Opencast 16 this summer break. Now that lectures have started and automatic recordings need to be cut, I noticed, the editor does not play the audio. 

The presented video file does contain audio, when downloaded I can play and hear the embeded audio, also does the waveform generator create the waveform correctly.

Wether using Chrome or Firefox, it's the same behaviour without sound.

So how do I get the editor to play the audio? 

Without audio we can not correctly cut the automatic recordings.

Regards

Sven

[s.la...@googlemail.com]

One remark, as I noticed not all automatic recordings do not play audio in the editor.

I attached 4 screenshots of the editor, from the cut and the tracks section.

To me it seems, the tracks are switched but correctly classified as presenter and presentation. The recordings are from the same pyCA recorder.

[Katrin Ihler]

Hi Sven,

looks like https://github.com/opencast/opencast-editor/pull/1376 hasn't been released yet, which could fix this issue. Gonna see if we can get that into 16.

Cheers,

Katrin

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ELAN e.V.
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elan-ev.de

[s.la...@googlemail.com]

Hi Katrin,

now that I updated all our Opencast nodes to 16.5 I'm still not hearing the audio.

And I know why. The recorded presentation file also contains an audio stream which mostly is empty, but sometimes could contain the presentation/computer audio.

So I think, the editor should better pick the presenter file for audio.

Could I manually tell the editor to use the presenter audio? Or could I switch to the old editor? I need to cut the recordings.

Regards

Sven

[s.la...@googlemail.com]

I tried switching to the old editor and set "prop.admin.editor.url=#!/events/events/$id/tools/editor" in org.opencastproject.organization-mh_default_org.cfg, but this does not work either. I'm always getting the new editor.

[s.la...@googlemail.com]

I now have opened an issue for my problem: https://github.com/opencast/opencast-editor/issues/1475

[s.la...@googlemail.com]

Hi,

opencast 16 and the new editor drives me crazy.

I think I've managed to get my workflows extended to strip off all presentation audio from scheduled recordings, at least the presentation video file from the editor shows no sign of an audio track.

But still I don't hear the presenter voice/audio in the editor (please see screenshot attached).

What did I do?

I extended the partial-preview.xml workflow with the following "select tracks" operation:

<!-- Strip off presentation audio -->
<operation
if="${hide_presentation_audio}"
id="select-tracks"
description="Select tracks for further processing">
<configurations>
<configuration key="source-flavor">*/source</configuration>
<configuration key="target-flavor">*/selected</configuration>
<configuration key="audio-muxing">force</configuration>
</configurations>
</operation>

<!-- Transcode video previews -->

<!-- CHANGEME: Add
if="NOT (${presenter_source_video} AND ${presentation_source_video})"
to this operation if you use the old editor -->
<operation
id="encode"
exception-handler-workflow="partial-error"
description="Create single-stream video preview">
<configurations>
<configuration key="source-flavors">*/selected</configuration>
<configuration key="target-flavor">*/preview</configuration>
<configuration key="target-tags">preview</configuration>
<configuration key="encoding-profile">mp4-preview.http</configuration>
</configurations>
</operation>

Maybe I need to do anything else?

Maybe someone has a more complete and comprehensible example then the one from the WOH description for select-tracks?

Regards

Sven

[ArneWilken]

> I tried switching to the old editor and set "prop.admin.editor.url=#!/events/events/$id/tools/editor" in org.opencastproject.organization-mh_default_org.cfg, but this does not work either. I'm always getting the new editor.

I assume because you are accessing the editor through the new admin ui, which does not respect that setting. If you go through the old admin ui, you should still be able to access the old editor.

https://docs.opencast.org/r/16.x/admin/#configuration/admin-ui/new-admin-ui/#configuring-the-default-admin-interface

(Note that the old admin ui will go away at some point, and the old editor with it, so this is a short-term fix)

[ArneWilken]

Also note that https://github.com/opencast/opencast-editor/pull/1376 is afaik not in an Opencast release yet, so updating Opencast does not yet help you with this particular issue.

[s.la...@googlemail.com]

🤔

So what is your suggestion what can I do to mitigate this problem until the change of the external editor will finally be merged in to opencast?

I'm just installing opencast from rpms, I don't build it for our service.

*sigh* (should have stayed on opencast 13) 🙄

[ArneWilken]

In one of your mails you mentioned that you tried going back to the old editor, but could not figure out how to do so.

I assumed that going back to the old editor would help with your problems (for the time being at least), and so I suggested that you switch back to the old admin ui which should then allow you to access the old editor.
The old admin ui is deactivated by default in Opencast 16, but you can enable it again as a plugin in the etc/org.opencastproject.plugin.impl.PluginManagerImpl.cfg configuration file.

[s.la...@googlemail.com]

Hi,

i've managed to work around the issues by re-enabling the composite preview creation and cutting in the new editor as the old editor seems to have some quirks too.

But what we are missing in the new editor is the possibility to zoom in. Also the cut list overview was really helpful.

Regards

Sven