MediaPortal Audio renderer - better video playback quality (2 Viewers)

[red5goahead]

Re: AW: MediaPortal Audio renderer - better video playback quality

did some quick tests. screenshot/logs attached and video details out of MPC-HC

OnkelChris. 24 fps on 60 refresh rate is not a good start...

 

[OnkelChris]

AW: Re: AW: MediaPortal Audio renderer - better video playback quality

OnkelChris. 24 fps on 60 refresh rate is not a good start...

hmmm... did this on my "dev" system... what input should I use? can't change refreshrate... thought the new renderer would be capable of this..?!

 

[tourettes]

Re: AW: Re: AW: MediaPortal Audio renderer - better video playback quality

OnkelChris. 24 fps on 60 refresh rate is not a good start...

hmmm... did this on my "dev" system... what input should I use? can't change refreshrate... thought the new renderer would be capable of this..?!

24 / 48 / 72 fps is not close enough for 60Hz, difference is more than 6%. More than 6% speed up / slow down is just much too noticerable so there is no point in supporting such (even when it would be technically really easy). Just think about all physical laws just "running" approx one quater faster, it will look really unnatural.

 

[tourettes]

I've tried also with 50 HZ plasma refresh rate tahn 75 Hz. but the speedup seems not active.

Please post the logs. ! stats are showing the speed up (bias non 1.0 value) but the graph indeed shows that the speed up is not done.

Of course.

I would say that if you check with graphedit you are seeing that some other audio renderer is used / connected to the audio decoder:

12-07-2010 21:38:25.350 [970]WAVEFORMATEX:
12-07-2010 21:38:25.350 [970] nAvgBytesPerSec 576000
12-07-2010 21:38:25.351 [970] nBlockAlign 12
12-07-2010 21:38:25.351 [970] nChannels 6
12-07-2010 21:38:25.351 [970] nSamplesPerSec 48000
12-07-2010 21:38:25.351 [970] wBitsPerSample 16
12-07-2010 21:38:25.351 [970] wFormatTag 65534
12-07-2010 21:38:25.351 [970] WAVE_FORMAT_EXTENSIBLE
12-07-2010 21:38:25.351 [970] dwChannelMask 63
12-07-2010 21:38:25.351 [970] GUID {00000001-0000-0010-8000-00AA00389B71}

Make sure that ffdshow audio decoder is configured to

1) stereo output
2) 16 bit integer samples only
3) SPDIF and all other passhtru are disabled

I have updated the first post to contain audio decoder recommendation / settings.

 

[red5goahead]

I would say that if you check with graphedit you are seeing that some other audio renderer is used / connected to the audio decoder:
1) stereo output
2) 16 bit integer samples only
3) SPDIF and all other passhtru are disabled

I have updated the first post to contain audio decoder recommendation / settings.

Yes. new audio renderer is not connected.

But I don't understand why. I've a Dolby Digital live card so the passthrough option is not activated (never)

Audio outside ffdshow decoder is pcm and 16 bit. I choose an Mvk with ac3 2.0 for the test.

 

[tourettes]

But I don't understand why. I've a Dolby Digital live card so the passthrough option is not activated (never)

Only following formats were asked from the audio renderer. 00000001-0000-0010-8000-00AA00389B71 is PCM's GUID.

WAVEFORMATEX:
nAvgBytesPerSec 0
nBlockAlign 0
nChannels 6
nSamplesPerSec 48000
wBitsPerSample 0
wFormatTag 0

WAVEFORMATEX:
nAvgBytesPerSec 0
nBlockAlign 0
nChannels 6
nSamplesPerSec 48000
wBitsPerSample 0
wFormatTag 8192

WAVEFORMATEX:
nAvgBytesPerSec 576000
nBlockAlign 12
nChannels 6
nSamplesPerSec 48000
wBitsPerSample 16
wFormatTag 65534
WAVE_FORMAT_EXTENSIBLE
dwChannelMask 63
GUID {00000001-0000-0010-8000-00AA00389B71}

WAVEFORMATEX:
nAvgBytesPerSec 576000
nBlockAlign 12
nChannels 6
nSamplesPerSec 48000
wBitsPerSample 16
wFormatTag 65534
WAVE_FORMAT_EXTENSIBLE
dwChannelMask 63
GUID {00000001-0000-0010-8000-00AA00389B71}

Audio outside ffdshow decoder is pcm and 16 bit. I choose an Mvk with ac3 2.0 for the test.

Quite odd indeed.

 

[red5goahead]

Ok. It's working . I force 2/0/0 stereo format in the mixed tab of ffdshow audio decoder. Now the new renderer has been connected to the filter graph. but....

The audio became out of synch , the video hastes and audio synch became worst (delayed) minutes after minutes. Note the subtitle remains perfect in synch with the video and there is not any trace of frame lost or stuttering. the Shift-1 info seems perfect.

 

[tourettes]

The audio became out of synch , the video hastes and audio synch became worst (delayed) minutes after minutes. Note the subtitle remains perfect in synch with the video and there is not any trace of frame lost or stuttering. the Shift-1 info seems perfect.

Does that happen with all videos? Also with the 1:1 matching ones? Try if changing EnableTimestretching or UseThreadsForResampling settings make any difference.

Also how CPU load is during the playback?

 

[red5goahead]

The audio became out of synch , the video hastes and audio synch became worst (delayed) minutes after minutes. Note the subtitle remains perfect in synch with the video and there is not any trace of frame lost or stuttering. the Shift-1 info seems perfect.

Does that happen with all videos? Also with the 1:1 matching ones? Try if changing EnableTimestretching or UseThreadsForResampling settings make any difference.

Also how CPU load is during the playback?

1:1 matching is not possbile for my hw so I can't test it.

1) The issue is for all files I've tested. Remember I've a lot of experience with reclock. The cpu is loaded about for 40%.

2) With EnableTimestretching =0 the issue is gone away. But no speedup is performed so I believe is not meaningful

3) with UseThreadsForResampling=0 the speedup is performed but I've no audio .

 

[Henkie Flits]

Really great development Tourettes, thanks everyone for all the hard work.

Tourettes, can you give an indication of when multiple channel audio support will be added? When this is done I will be more then happy to test. Thanks!