AC3 filter + SPDIF + input 44100Hz = stuttering sound

timonoj · 2008-05-28, 08:47

Hi, I am using the AC3 Filter for audio playback, since it gives a good support for spdif passthrough (DTS,DD). I don't like quite much ffdshow audio codec, since it gives a funny movement of the video (on DTS tracks, it goes slightly faster for half second every 4~5 seconds). So AC3 filter works perfectly fine with all of my DVD movies, and I didn't have any problem with any .mkv with AC3 or DTS sound. The problem started playing an old Divx, which has the audio in mp3 sampled at 44100Hz. When this happens, the audio stutters a lot, making the video unviewable.
I am pretty sure it is all related to 44100 instead of 48khz output...Do you know any way of setting MP in a way it loads AC3Filter for any 48khz input but loads any other common filter such as MPA decoder (as this one seems to run fine with 44.1Khz input through SPDIF) in case it finds any weird sample rate?

Thanks a lot!

Nagash · 2008-08-26, 11:51

Hi there.
Did you ever find a solution to this problem. I'm having the same one, and I can't find any way to make it work. And as you said, it's only movies with a track at 44100hz, all movies with 48000hz dosn't have any problems at all.

KevL · 2008-08-26, 12:22

Have a read of this. If your sound card can austoswitch it might work for you

How to get bit perfect playback, DTS5.1 and Dolby Digital 5.1 in MP

K

Nagash · 2008-08-26, 14:08

I'll take a look at it. Thanks for now.

2008-05-28, 08:47	#1 (permalink)
timonoj Portal User Join Date: May 2008 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Country:	AC3 filter + SPDIF + input 44100Hz = stuttering sound Hi, I am using the AC3 Filter for audio playback, since it gives a good support for spdif passthrough (DTS,DD). I don't like quite much ffdshow audio codec, since it gives a funny movement of the video (on DTS tracks, it goes slightly faster for half second every 4~5 seconds). So AC3 filter works perfectly fine with all of my DVD movies, and I didn't have any problem with any .mkv with AC3 or DTS sound. The problem started playing an old Divx, which has the audio in mp3 sampled at 44100Hz. When this happens, the audio stutters a lot, making the video unviewable. I am pretty sure it is all related to 44100 instead of 48khz output...Do you know any way of setting MP in a way it loads AC3Filter for any 48khz input but loads any other common filter such as MPA decoder (as this one seems to run fine with 44.1Khz input through SPDIF) in case it finds any weird sample rate? Thanks a lot!

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2008-08-26, 11:51	#2 (permalink)
Nagash Portal User Join Date: Sep 2006 Location: Aalborg Age: 25 Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Country: My System	Hi there. Did you ever find a solution to this problem. I'm having the same one, and I can't find any way to make it work. And as you said, it's only movies with a track at 44100hz, all movies with 48000hz dosn't have any problems at all.

2008-08-26, 12:22	#3 (permalink)
KevL Portal Member Join Date: Mar 2005 Location: Cambridge, UK Posts: 120 Thanks: 0 Thanked 1 Time in 1 Post Country: My System	Have a read of this. If your sound card can austoswitch it might work for you How to get bit perfect playback, DTS5.1 and Dolby Digital 5.1 in MP K

2008-08-26, 14:08	#4 (permalink)
Nagash Portal User Join Date: Sep 2006 Location: Aalborg Age: 25 Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Country: My System	I'll take a look at it. Thanks for now.