[Etharr]

Is there any chance to add Dolby Digital transcoding for any digital output configuration?

[ironic_monkey]

has been supported for a couple of years.

[da-anda]

if you don't see the according setting in settings -> system -> Audio try changing the settings level to "advanced". Note that the option only will be available if your HW does support it (HDMI, SPDIF)

[jjd-uk]

The option is also only seen if SPDIF is set as the Passthrough audio device or if Number of channels is set to 2.0 for HDMI.

[bsteiner69]

The movie Transformers: Age of Extinction has a new Dolby True HD (ATMOS) audio track that won't play in XBMC. The very small amount of research I've done on this indicates the only video player that will play it is PowerDVD.
All the other Dolby Digital and DTS tracks have worked with SPIDF optical.
I have seen an issue with DTS-HD on a few movies. When I watch with the audio setting under HDMI setting instead of SPIDF optical, the movie moves really slowly without audio. If the audio setting is set to optical instead of HDMI it plays perfectly. I'm assuming its playing as DTS audio, though, because DTS-HD is grayed out under optical setting but shows up if HDMI is selected. I have both connections from my computer to AV receiver because my video card is using a DVI-HDMI cable and WMC doesn't seem to recognize HDMI audio but optical works well from motherboard..

[Martijn]

The movie Transformers: Age of Extinction has a new Dolby True HD (ATMOS) audio track that won't play in XBMC. The very small amount of research I've done on this indicates the only video player that will play it is PowerDVD.
All the other Dolby Digital and DTS tracks have worked with SPIDF optical.
I have seen an issue with DTS-HD on a few movies. When I watch with the audio setting under HDMI setting instead of SPIDF optical, the movie moves really slowly without audio. If the audio setting is set to optical instead of HDMI it plays perfectly. I'm assuming its playing as DTS audio, though, because DTS-HD is grayed out under optical setting but shows up if HDMI is selected. I have both connections from my computer to AV receiver because my video card is using a DVI-HDMI cable and WMC doesn't seem to recognize HDMI audio but optical works well from motherboard..

Totally off topic.

It's a known issue which is already fixed for possible future version depending on ffmpeg release

[loekf]

The movie Transformers: Age of Extinction has a new Dolby True HD (ATMOS) audio track that won't play in XBMC. The very small amount of research I've done on this indicates the only video player that will play it is PowerDVD.
All the other Dolby Digital and DTS tracks have worked with SPIDF optical.
I have seen an issue with DTS-HD on a few movies. When I watch with the audio setting under HDMI setting instead of SPIDF optical, the movie moves really slowly without audio. If the audio setting is set to optical instead of HDMI it plays perfectly. I'm assuming its playing as DTS audio, though, because DTS-HD is grayed out under optical setting but shows up if HDMI is selected. I have both connections from my computer to AV receiver because my video card is using a DVI-HDMI cable and WMC doesn't seem to recognize HDMI audio but optical works well from motherboard..

Totally off topic.

It's a known issue which is already fixed for possible future version depending on ffmpeg release

If you go to the ffmpeg dev site, you will see that a patch has been made to fix parsing a TrueHD header with Atmos. I managed to find two demo/test
streams from the upcoming Transformers release and you hear/see that e.g. VLC can't decode the TrueHD track with Atmos content.

If Kodi/XBMC can just stream the TrueHD track to my receiver all is ok, my Onkyo receiver is supposed to get a firmware update this month to enable Atmos decoding.

[da-anda]

@loekf - see https://github.com/xbmc/FFmpeg/pull/2

[Etharr]

I was thinking of extending this function.
At the moment only works with 2.0 speaker configuration and no transcode for MPEG-2 2.0.
It seems that transcoding is limited to work FLAC 5.1 and DTS 5.1 streams.
Am I right?

[ironic_monkey]

why would you want to encode 2.0 audio? everything can eat 2.0 in pcm.

[Etharr]

First of all I would like to get rid of the annoying sound of the AVR
when switching channels with different encoding format.
In addition, channel switching is slightly faster when encoding format is fixed.

[Hedda]

Dolby Digital is not a lossless compression format so doing that would make audio quality worse or? Best practice is normally to not convert lossless format like PCM to lossy Dolby Digital.

It seems that transcoding is limited to work FLAC 5.1 and DTS 5.1 streams.
Am I right?

Shouldn't XBMC/Kodi really support all down-mixing and transcoding of multi-channel codecs that FFmpeg supports no matter if really used much in the real-world or not?

FFmpeg support multi-channel MP2, MP3, mp3PRO, Vorbis, Opus, FLAC, AAC, WMA Pro, WMA Lossless, MPEG-4 ALS, Real Audio, QuickTime Audio, MLP, Dolby TrueHD, DTS, and DTS-MA

http://en.wikipedia.org/wiki/FFmpeg#Codecs

Multi-channel AAC and WMA / WMA Pro are at least used in the real-world, and Matroska supports most of these in their MKV specification

http://www.matroska.org/technical/specs/...index.html

[da-anda]

you already can upmix 2ch audio to 5.1

[Etharr]

Can upmixed audio be transcoded to Dolby Digital?

---

Doh, It can't be transcoded, because it's impossible to set 5.1 channels and enable Dolby Digital transcoding at the same time.

[Memphiz]

Set channels to 2.0 and enable stereo upmix - this should transcode 2.0 to ac3 and mixing 2.0 up to 5.1 (this is not quiet yet what you want i suppose).