Live media restarts when adding media to servicemanager

[Tomas Groth]

Live media restarts when adding media to servicemanager.

Confirmed in OpenLP 2.1.5 on Windows 8.1 using VLC as media player, though it probably applies to other setups as well.

[Tomas Groth (tomasgroth)]

The problem is that in plugins/media/media_item.py:generate_slide_data we want to get the media length, and we do this by playing the media for a very short while to get the player to load the media, and then the length can be extracted. Unfortunately we only have one player instance, which means we use the same player instance for the length-detection and for playing the live-media. So this bug is kind of dependent on fixing bug #1022053 .

[Tomas Groth (tomasgroth)]

Reported in the forum: http://forums.openlp.org/discussion/2651/live-video-restarts-itself-when-adding-a-new-item-to-the-service-manager-v-2-1-5

This is not an issue in 2.0.5.

[Tim Bentley (trb143)]

Need to look at the code.
Refactored in 2.2 as there were many issues in 2.0.
Looks like the change to the Registry may have changed the original implementation as there were meant to be 3 media controller instances.

[Raoul Snyman (raoul-snyman)]

Can we not just create a media player instance when we do this? Also, is there not some other way to get the media length, like looking at media file headers? It may mean adding another library to OpenLP, but I'd rather do that than our current hack, to be honest.

[Tim Bentley (trb143)]

The info is only available via API calls which are populated only when play is pressed.

[Tomas Groth (tomasgroth)]

We could have a look at hachoir3: https://bitbucket.org/haypo/hachoir3
It seems to be pure python

[Aj (ajboy04-v)]

Any new info on this bug fix?