View Bug Details

IDProjectCategoryView StatusLast Update
0001217DCP-o-maticBugspublic2023-12-22 22:33
Reportercarl Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
Status acknowledgedResolutionopen 
Summary0001217: Upmixers producing garbled/distorted/bad results
Description

Tempted to remove them from 2.12.0 at least temporarily.

TagsNo tags attached.
Branch
Estimated weeks required
Estimated work requiredUnknown

Activities

Carsten

2018-02-28 00:48

manager   ~0002212

Any references to specific source material causing these issues? Ways to reproduce?

  • Carsten

carl

2018-02-28 00:52

administrator   ~0002213

Seems to have happened on a load of different material being prepared for a film festival. I'll get some of the bad audio soon and maybe that will give some idea.

Carsten

2018-02-28 01:20

manager   ~0002216

Quick check with 2.11.67 in Sierra shows no obvious issues with either MidSide nor UpA or UpB. A Film Festival? Why the heck would a film festival use the upmixers?

Did they try a previous DCP-o-matic version with the upmixers as well?

Maybe ask about this in the forum or the mailing list?

  • Carsten

carl

2018-02-28 01:24

administrator   ~0002217

Thanks for checking. This is the first version with upmixing he's tried. He's under some time pressure but once that's sorted I'll try and get some more details. I have to say I've never been particularly convinced that the upmixers should be there...

Carsten

2018-02-28 01:33

manager   ~0002220

Last edited: 2018-02-28 01:36

He should probably just pass through the audio 1:1 for now, a festival, and under pressure, is not the place and time to try and use them. This is not Philipp from Regensburg? Their festival starts soon. Looking at LUFS is probably much more helpful in this situation. Recently I did quite a few tests for useful level recommendations. -20LUFS is a good rule of thumb for now.

  • Carsten

carl

2018-03-02 22:04

administrator   ~0002262

It's not Philipp. I'm waiting for some MXF samples to see if we can decide how bad things are!

carl

2018-03-13 11:57

administrator   ~0002292

No samples have yet been forthcoming. I've added a hint about the experimental nature of the upmixers.

Bug History

Date Modified Username Field Change
2018-02-27 23:41 carl New Bug
2018-02-28 00:48 Carsten Note Added: 0002212
2018-02-28 00:52 carl Note Added: 0002213
2018-02-28 01:20 Carsten Note Added: 0002216
2018-02-28 01:24 carl Note Added: 0002217
2018-02-28 01:33 Carsten Note Added: 0002220
2018-02-28 01:36 Carsten Note Edited: 0002220
2018-03-02 22:04 carl Note Added: 0002262
2018-03-13 11:57 carl Target Version 2.12.0 =>
2018-03-13 11:57 carl Note Added: 0002292
2023-12-22 22:33 carl Status new => acknowledged