No audio in playback or timeshift

[chadk]

Okay, I've been beating my head and scrounging the forum for days, and now it's time to reach out for help.

Summary:
I have no audio when playing back a recorded show in PVRX2. No audio during recording, and no audio when timeshifting. Audio is fine while watching live TV. Audio is fine when using VLC to view the recorded file.

Things I've tried:

• I've cycled through just about every combination of Video, Audio and AC3 decoders.
  
• Video: ffdshow, MPV, ATI, Cyberlink, Intervideo. Intervideo is the best for video.
  
• Audio: ffdshow, MPA, ATI, Cyberlink, etc.
  
• AC3: ffdshow, MPA, AC3filter, Cyberlink, Intervideo. Cyberlink seems to keep the audio in sync the best during live TV.
  
• Nearly every decoder combination works for live TV, just with various performance (dropped video frames, audio sync). No combination has audio for playback or timeshift, although video is fine.
  
• I've replaced the quartz.dll with the recommended one, but no improvement, and it causes the Intervideo video decoder to show (CTL-O) half resolution (that is, report 967x544 for a 1920x1080 broadcast). I've since restored the original dll.
  
• Tried all the video renderers. Best video combination for me is the VMR9 Custom with InterVideo Video decoder, Cyberlink audio decoders.
  

Setup:
WinXP, ATI HD 650 PCI, terrestrial ATSC. Most shows are reporting (CTL-O) either 720 or 1080, MPEG2, AC3. Advanced codecs are all System Default. TS Mux used with Multi-Record selected. MediaInfo reports the recorded file as MPEG-TS (720p), with 2 channel AC-3 audio. (Again, VLC plays fine.) Also tried with a recorded 720p, 6-ch AC-3 audio file.

Attached log files: Combinations of codecs are in the filenames. Start PVRX2, start live TV, hear audio, ESC to main menu, go to recordings, start the same recording, hear no audio, close PVRX2.

Any help would be appreciated.

[sub]

2009-12-30 13:40:15.602 VERBOSE Graph contains the following filters:
2009-12-30 13:40:15.602 VERBOSE - GB-PVR DVB Subtitles
2009-12-30 13:40:15.602 VERBOSE - Default WaveOut Device 0008
2009-12-30 13:40:15.602 VERBOSE - Default WaveOut Device 0004
2009-12-30 13:40:15.602 VERBOSE - Default WaveOut Device
2009-12-30 13:40:15.602 VERBOSE - Video Renderer
2009-12-30 13:40:15.602 VERBOSE - MPV Decoder Filter
2009-12-30 13:40:15.602 VERBOSE - AC3Filter 0006
2009-12-30 13:40:15.602 VERBOSE - AC3Filter 0002
2009-12-30 13:40:15.602 VERBOSE - AC3Filter
2009-12-30 13:40:15.602 VERBOSE - GB-PVR Flow Status
2009-12-30 13:40:15.602 VERBOSE - MPC - MPA Decoder Filter 0005
2009-12-30 13:40:15.602 VERBOSE - MPC - MPA Decoder Filter
2009-12-30 13:40:15.602 VERBOSE - DivX AAC Decoder
2009-12-30 13:40:15.618 VERBOSE - MPEG-2 Demultiplexer
2009-12-30 13:40:15.618 VERBOSE - SOURCE

I'm guessing its something to do with your default audio device. It'd normally be 'Default DirectSound Device', where yours is defaulting to 'Default WaveOut Device'.

[chadk]

Thanks for quick reply.

I've now gone into config, changed the Audio Renderer from System Default to DirectSound:Creative Soundblaster PCI and did the same test. Apparently, during the Live TV, DirectSound is found, but not during recording playback. Log attached.

Suggestions on how to remedy?

[whurlston]

Six audio decoders is far too many to be loading. I suspect that you have PCM checked in the AC3Filter config "System" tab. It should be unchecked. You probably also have "Use Wave out by default" checked in the same tab which should be changed.

[chadk]

Six audio decoders is far too many to be loading. I suspect that you have PCM checked in the AC3Filter config "System" tab. It should be unchecked. You probably also have "Use Wave out by default" checked in the same tab which should be changed.

Correct on all counts. Changed the two AC3Filter settings you mentioned, and BINGO!!!! I have audio on playback of recorded shows!!!!

So, how do I do housecleaning to remove all the excess audio/video decoders?

[whurlston]

If they don't have an uninstaller, you can use GSpot or GraphStudio to unregister the .ax files which can then be deleted. Personally, I would use AC3Filter over the MPC decoder for AC-3 and MPEG audio.