[mythtv-users] DTS sound is cracking on some videos

[Jean-Yves Avenard]

On 14 January 2011 20:18, Daniel Herrmann <daniel.herrmann1 at gmx.de> wrote:

> Current Version now is: trunk (nk27322)
>
> Here is the log:
>
> ___schnipp___
> 2011-01-14 10:12:38.535 TV: Attempting to change from None to WatchingVideo
> 2011-01-14 10:12:39.210 Pulse: PulseAudio suspend OK
> 2011-01-14 10:12:39.610 AFD Warning: ScanATSCCaptionStreams() called with no
> PMT
> 2011-01-14 10:12:39.611 AFD: Opened codec 0x197bdc0, id(H264) type(Video)
> 2011-01-14 10:12:39.611 AFD: codec DTS has 6 channels
> 2011-01-14 10:12:39.611 AFD: Opened codec 0x1c7f650, id(DTS) type(Audio)
> 2011-01-14 10:12:39.812 Pulse: PulseAudio resume OK
> 2011-01-14 10:12:40.013 Pulse: PulseAudio suspend OK
> 2011-01-14 10:12:40.055 AO: Opening audio device 'hdmi:CARD=NVidia,DEV=0' ch
> 2(6) sr 48000 sf signed 16 bit reenc 1
> 2011-01-14 10:12:40.058 AudioPlayer: Enabling Audio
> 2011-01-14 10:12:41.214 VDPAU: Created 2 output surfaces.
> 2011-01-14 10:12:41.215 VDPAU: Version 1
> 2011-01-14 10:12:41.215 VDPAU: Information NVIDIA VDPAU Driver Shared
> Library  195.36.24  Thu Apr 22 19:52:55 PDT 2010
> 2011-01-14 10:12:41.215 VDPAU: Created VDPAU render device 1920x1080
> 2011-01-14 10:12:41.677 Player(0): Forcing decode extra audio option on
> (Video method requires it).
> 2011-01-14 10:12:41.924 Player(0): Video timing method: USleep with busy
> wait
> 2011-01-14 10:12:41.925 TV: Changing from None to WatchingVideo
> 2011-01-14 10:12:41.980 VDPAU: Added 2 output surfaces (total 4, max 4)
> ___schnapp___
>
> At least the sound works now, but any ideas, why i dont get DTS? I had this
> sometimes with 0.23, that when playing audio with DTS, receiver shows DD.
> This got fixed for me with 0.24, but in this version it seems to be there
> again. Any further ideas?

you would need to post the log with running mythfrontend using -v
audio to see what's going on.

> 2011-01-14 10:12:40.055 AO: Opening audio device 'hdmi:CARD=NVidia,DEV=0' ch
> 2(6) sr 48000 sf signed 16 bit reenc 1

reenc means that some processing had to be applied, so audio was
decoded then re-encoded, at this stage audio can only be re-encoded to
AC3 as no DTS encoder currently exists.

Why audio processing had to be applied, I can not say without more
details in the logs..