Opened 17 months ago

Closed 17 months ago

Last modified 17 months ago

#7938 closed defect (invalid)

7.1 Surround Channels Different in DTS-HD & Atmos Playback

Reported by: me02 Owned by:
Priority: normal Component: undetermined
Version: unspecified Keywords: dca
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug:
7.1 surround audio plays back as 8 discrete channels, but through different speakers when using DTS-HD and Dolby Atmos.
I believe the Atmos playback is correct, if true, the DTS-HD side channels play through the rear speakers and the rear channels play through the side speakers.
How to reproduce:
Play the attached files...

Change History (8)

comment:1 Changed 17 months ago by richardpl

No attached files, someone will just close ticket as invalid.

comment:2 Changed 17 months ago by heleppkes

"Believe" is not a very strong feeling, while I have "Channel Identification" samples that come out the appropriate channel just fine.

comment:3 Changed 17 months ago by me02

Sorry, couldn't edit the files to make them small enough.
Posted here instead:

http://firestationstudios.com/7dot1/index.html.

comment:4 Changed 17 months ago by cehoyos

  • Keywords atmos surround 7.1 removed
  • Resolution set to worksforme
  • Status changed from new to closed

Atmos is not supported by FFmpeg but both your samples play fine here.

Please understand that valid tickets need an FFmpeg command line including complete, uncut console output.

comment:5 follow-up: Changed 17 months ago by mkver

Your atmos file isn't atmos, but PCM in a CAF container. And it seems that what the speaker says and how FFmpeg handles this file are in contradiction for this file, not the dts files. But I don't know if this is a bug in FFmpeg's handling of CAF or if that's just the way your file is.

comment:6 in reply to: ↑ 5 Changed 17 months ago by me02

Replying to mkver:

Your atmos file isn't atmos, but PCM in a CAF container. And it seems that what the speaker says and how FFmpeg handles this file are in contradiction for this file, not the dts files. But I don't know if this is a bug in FFmpeg's handling of CAF or if that's just the way your file is.

Thanks! That is most helpful.

comment:7 Changed 17 months ago by mkver

  • Resolution changed from worksforme to invalid

And the CAF file doesn't contain the channel layout chunk which is mandatory as the number of channels is > 2. This of course implies that FFmpeg (or any other tool) is free to map the channels in the file to any position it sees fit (or even to refuse to play the file at all). And this makes this issue invalid.

comment:8 Changed 17 months ago by cehoyos

  • Keywords dca added; dts removed
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