Waveform generation takes very long

[Arnei]

For a 1:15 hour long video, the waveform took 40 seconds to generate. Also, it is not cached on reload. -Innsbruck

[Arnei]

Main problem here seems to be that the frontend has to download the whole video file before it can start generating anything, which may take quite a bit for larger files.

Possible solutions:

• Send considerably smaller preview versions of the videos to the editor (instead of fullHD)
• Have Opencast create a compressed audio file, which can then be used by the frontend for waveform generation.
• Go back to Opencast generating the waveform

[Melanie-Koller]

For really long videos (07:00) you get no waveform at all.

[kristofkeppens]

Even for videos with a duration of around 3:00:00 you get no duration ( or it takes longer than I and our users are willing to wait , > 10min ). Is there a way to configure this to use the opencast waveform ?

[wsmirnow]

The editor preview videos are far smaller then FHD (with the default workflows). I would prefere to have an Option for Standolone Editor to select an separate Track (by flavor) for waveform generation.