id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	mlocked
8839	DTS Passthrough stutters/choppy/laggy on trunk and if unchecked then crashes playback	mitch.capper@…	JYA	"I am using trunk(25907) and when I play a video in mythvideo with DTS I run into an issues.  My setup is set to ALSA:iec857:CARD=intel,DEV=0 for audio output device  with DD and DTS checked and speaker config on 5.1 without upconverting checked.     Playing normal media is fine but when playing something with DTS while the receiver is showing DTS received the audio stutters heavily (multiple times a second I would say).  Playing through mplayer with -afm hwac3 has the DTS audio working just fine.

Playback without DTS enabled also works fine.

*) if Stereo mode is enabled instead of 5.1 (as spdif can't pass standard surround I believe)  audio works giving stereo sound but no DTS is passed through (even though its checked)
*) If DTS is unchecked but Dolby Digital is left checked (some suggested this would convert between the two) I just get lots of entries of:
getBufferedOnSoundcard() called with pcm_handle == NULL
followed by:
2010-08-29 10:08:35.156 Player(4): Waited 100ms for video buffers AAAAAAaAAAAALaaaL
Several times 
 in the log and no audio and video does not even play.  Dolby Digital encoded items however do play fine (and receiver shows it as receiving DD signal)

I tried various debug modes but don't see anything that would seem to hint towards why there is a stutter. "	defect	closed	major	unknown	MythTV - Audio Output	Master Head	medium	Invalid	DTS, stutter, SPDIF		1