[WINDOWS][PATCH]Bitstream output of HD audio formats

... cool thing. I'll stick with the nightlies.

:-)

(2012-05-31 19:56)DDDamian Wrote:  tjcinnamon - not a bug - if you want HD audio it requires exclusive mode. If you want sound from other apps use DirectSound.

I'm rolling with your windows only version and have the same settings as the screenshot yet I'm not relegated to exclusive mode. Perhaps your version allows both? I can take a screenshot when I get home to prove it.

Damian, is there a specific build you can recommend as "stable" that has the new audio engine included?

@voip-ninja - May 30th nightly was very good. Any taken after may run into this merge cycle

@tjcinnamon - not sure what you mean. AE supports WASAPI exclusive and DirectSound, and you can apply them to passthrough and non-passthrough independently of each other.

Just FYI folks - please use one of the AE threads for any further questions about it. I have no problems answering those there, and supporting Daniela's patch here as I have from day one (as with any other questions I feel I can help with), but let's keep them seperate. I have answered the pros and cons of each in a previous post, but supporting AE in this thread will confuse users

NVM

Looking for some clarification on "Sync playback to display" using Eden with DanielaE's patch:

When playing back 24p mkv's with hd audio via bitstream, I would get dropped frames (I believe thanks to Intel's inability to output 23.976- I have an Ivy w/HD4000). I enabled "Sync playback to display" with "Video Clock(resample audio)" selected. This appears to have fixed the dropped frames.

However, I just read that using this option does not allow "passthrough." My receiver still shows DTS-HD MSTR on it's display, so I assume XBMC is still bitstreaming the audio? Am I confusing "passthrough" with "bitstreaming?"

Do I have it set correctly for what I am trying to accomplish (no dropped frames with bitstreamed HD audio), do I need to set it up differently, or should I be using the new AE build from the nighties?

(2012-06-08 08:55)shanndogg Wrote:  However, I just read that using this option does not allow "passthrough." My receiver still shows DTS-HD MSTR on it's display, so I assume XBMC is still bitstreaming the audio? Am I confusing "passthrough" with "bitstreaming?"

Who said that? If your receiver display DTS-HD MSTR, it is the real deal. If everything work fine with "Sync playback to display" enabled and "Video Clock(resample audio)" selected, congratulation.......it's time to enjoy the movie......

Kinda the opposite - resample audio does nothing when bitstreaming - it's ignored. It only does anything when playing pcm. You cannot resample passthrough with the existing code - there's no code there to do it.

(2012-06-08 18:16)bluray Wrote:  Who said that? If your receiver display DTS-HD MSTR, it is the real deal. If everything work fine with "Sync playback to display" enabled and "Video Clock(resample audio)" selected, congratulation.......it's time to enjoy the movie......

It's posted in the XBMC Wiki found here. This is the exact sentence: "The disadvantage of resampling is that it doesn't work with passthrough, and there is a slight loss of audio quality."

(2012-06-08 18:25)DDDamian Wrote:  Kinda the opposite - resample audio does nothing when bitstreaming - it's ignored. It only does anything when playing pcm. You cannot resample passthrough with the existing code - there's no code there to do it.

I am enjoying the movies/set up, I just like to understand and learn how things work and why turning on Sync playback to display with the resample audio option fixes the dropped frames. Is it just speeding up or slowing down the video to match what the HTPC's frequency is able to put out without touching the bitstreamed audio?

By my quick read it justs resets the error when the error exceeds the value it would normally drop a frame at (or speed up / slow down audio at if resampling). This may imply you'll get a slow drift over time, depends on other clocking values including in the file itself.

Note that this was from a two-minute look