Skype Audio Too Fast

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smilliken
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Skype Audio Too Fast

#1 Postby smilliken » Tue May 15, 2012 1:47 pm

Looking for some help getting the audio to slow down on Skype. I have a C270 Logitech webcam attached to the main USB on the computer. The video works great but the audio on the test plays back like a 78 when it should be more like a 45. The webcam works just fine in Win 7 on the same computer. I using Skype version 2.2 beta 64 bit. I've Google and read thru the wiki with not a lot of success.
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uncle mark
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Re: Skype Audio Too Fast

#2 Postby uncle mark » Tue May 15, 2012 1:50 pm

smilliken wrote:Looking for some help getting the audio to slow down on Skype.


Tell 'em to talk slower.
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Re: Skype Audio Too Fast

#3 Postby lucky9 » Wed May 16, 2012 12:29 am

Obviously an un-authorized dimensional skew. I'd purge and reinstall were it me.
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Re: Skype Audio Too Fast

#4 Postby smilliken » Wed May 16, 2012 12:33 am

lucky9 wrote:Obviously an un-authorized dimensional skew. I'd purge and reinstall were it me.


Yup, did that already, but will give it another go. Maybe there is a difference in the one in the Mepis repo and the beta from Skype?
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Re: Skype Audio Too Fast

#5 Postby lucky9 » Wed May 16, 2012 12:53 am

There should be a difference.
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Re: Skype Audio Too Fast

#6 Postby smilliken » Wed May 16, 2012 11:19 am

Removed Skype's version 2.2 beta and re-installed Warren's version (2.1) and received the same results.
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Re: Skype Audio Too Fast

#7 Postby GoManutd » Wed May 16, 2012 11:53 am

incompatible/misconfigured driver? that seems to be the next step to look at. assuming the sound is working fine elsewhere, that would indicate a non-issue with hardware. the only other point of failure would be a driver related. or skype is competing for the device (and winning, too much) with something else.

NOTE: just thought of this.... perhaps skype has TOO high a system priority making it incredibly greedy over other resources. check the nice levels

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Re: Skype Audio Too Fast

#8 Postby smilliken » Wed May 16, 2012 12:41 pm

GoManutd wrote:incompatible/misconfigured driver? that seems to be the next step to look at. assuming the sound is working fine elsewhere, that would indicate a non-issue with hardware. the only other point of failure would be a driver related. or skype is competing for the device (and winning, too much) with something else.

NOTE: just thought of this.... perhaps skype has TOO high a system priority making it incredibly greedy over other resources. check the nice levels


Music plays fine and the notifications sounds play fine.

From what I can see as for the nice level, Skype = 0
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Re: Skype Audio Too Fast

#9 Postby JBoman » Wed May 16, 2012 3:21 pm

Found threads on Arch and Ubuntu with folks having the same playback problem and they all indicated it is a kernel related problem... for them changing versions of skype did not help but reverting to an older kernel did. Looks like it could be in phoneon or similar. :turtle:
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Re: Skype Audio Too Fast

#10 Postby Nix Hard » Wed May 16, 2012 7:29 pm

smilliken,
I wonder if this may help. [Found it while fixing my upside-down image with Skype problem on my Asus laptop.](see Post Script for that fix/answer)

Quote from; http://openfacts2.berlios.de/wikien/ind ... n_Problems - Linux_UVC#Known_Problems
Known Problems

Some Logitech cameras suffer from a hardware/firmware bug which causes them to stop responding after a while. The exact nature and cause of the bug is still unclear. Logitech knows about it and gives info and workarounds for it and fixed the issue in later hardware versions. There are patches floating around which attempt to work around the bug, tho they tend not be kept uptodate with the main source:

"The reset patch". Last known appearance: [1]
Another patch that tries to be less blunt: old version more up-to-date version, as of January 2008.

Starting at version 2.6.22, the Linux kernel includes a USB audio bug fix which triggers a (possibly identical to the above) bug in first and second generation Logitech webcams. Fortunately this one seems to have a workaround, although not a pretty one.

The webcam audio interface must be initialised before the video interface. Linux will by default initialise the video interface first, so you need to remove the uvcvideo.ko module from the /lib/modules subdirectory where it gets loaded automatically, and load it manually after plugging the webcam.
A more convenient workaround on modern distros

Just add the following line to your /etc/modprobe.conf.local :

Code: Select all

install uvcvideo /sbin/modprobe snd_usb_audio; /sbin/modprobe --ignore-install uvcvideo


If you have to reset you cam for any reason, do:
unplug your cam
modprobe -r uvcvideo
modprobe -r snd_usb_audio
replug your cam
(not sure if step 1 and 4 are really necessary, or if 2 and 3 would be sufficient; on my Ubuntu 9.10 system, one needs to unplug the camera to be able to remove the audio module, which is otherwise kept used by Pulseaudio).

More info here about what webcams have what problems; http://www.ideasonboard.org/uvc/
It may be easier to get a webcam that is compatible with the kernel than change the kernel.

Cheers NH

PS:Fixing upside down webcam problem, got my fix from here; http://tpurch-blog.blogspot.co.nz/2010/ ... -down.html
32 bit system, fix for skype, start command for terminal or application link.

Code: Select all

LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so skype
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