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Delay of several minutes before audio streaming begins

Posted

For a few days the audio streams from France Musique and Radio Classique have appeared not to work: in fact they start several full minutes after being clicked on. I believe they use the WMP add-on. I suspect a problem with the Flash 11.3 plug-in, but although the Adobe forum suggests downgrading to 11.2 or 10.3, the installer doesn't actually allow this. Firefox reports all plug-ins up-to-date. Problem persists in Firefox Safe Mode (with only WMP and Flash plugins enabled). Identical problem with Chrome browser. However, no apparent problems with videos or their soundtracks: all seem to work fine. NB. Unlike in Chrome or Fx, the audio streams from those two radio stations play fine in both x64 and x32 versions of IE9 browser. I would like a clue as to where to start trouble-shooting.

For a few days the audio streams from France Musique and Radio Classique have appeared not to work: in fact they start several full minutes after being clicked on. I believe they use the WMP add-on. I suspect a problem with the Flash 11.3 plug-in, but although the Adobe forum suggests downgrading to 11.2 or 10.3, the installer doesn't actually allow this. Firefox reports all plug-ins up-to-date. Problem persists in Firefox Safe Mode (with only WMP and Flash plugins enabled). Identical problem with Chrome browser. However, no apparent problems with videos or their soundtracks: all seem to work fine. NB. Unlike in Chrome or Fx, the audio streams from those two radio stations play fine in both x64 and x32 versions of IE9 browser. I would like a clue as to where to start trouble-shooting.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.3 r300
  • np-mswmp

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1

More Information

Application Basics
Name
Firefox
Version
14.0.1
User Agent
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1
Profile Folder
Show Folder
Enabled Plugins
about:plugins
Build Configuration
about:buildconfig
Crash Reports
about:crashes
Memory Use
about:memory
Extensions
Name
Version
Enabled
ID
Better Gmail 2
1.2
false
bettergmail2@ginatrapani.org
Better GReader
0.8.3
false
bettergreader@ginatrapani.org
British English Dictionary
1.19.1
false
en-GB@dictionaries.addons.mozilla.org
Download Statusbar
0.9.10
false
{D4DD63FA-01E4-46a7-B6B1-EDAB7D6AD389}
FAYT
2.0.5
false
{c2d0e930-64de-11db-bd13-0800200c9a66}
Flash and Video Download
1.13
false
{bee6eb20-01e0-ebd1-da83-080329fb9a3a}
Flashblock
1.5.15.1
false
{3d7eb24f-2740-49df-8937-200b1cc08f8a}
Google Shortcuts
2.1.7.1
false
{5C46D283-ABDE-4dce-B83C-08881401921C}
Hide BookmarksBar
3.3
false
{311ece6e-ea6a-442f-a02a-a362e561d892}
LastPass
2.0.0
false
support@lastpass.com
NoScript
2.5rc5
false
{73a6fe31-595d-460b-a920-fcc0f8843232}
PDF Download
3.0.0.2
false
{37E4D8EA-8BDA-4831-8EA1-89053939A250}
Important Modified Preferences
Name
Value
accessibility.typeaheadfind
true
accessibility.typeaheadfind.flashBar
0
browser.cache.disk.capacity
1048576
browser.cache.disk.smart_size.first_run
false
browser.cache.disk.smart_size_cached_value
640000
browser.places.smartBookmarksVersion
4
browser.startup.homepage
https://www.google.com/accounts/ServiceLogin?service=reader&passive=1209600&continue=https%3A%2F%2Fwww.google.com%2Fread…
browser.startup.homepage_override.buildID
20120713134347
browser.startup.homepage_override.mstone
14.0.1
browser.tabs.loadInBackground
false
dom.disable_window_move_resize
true
extensions.lastAppVersion
14.0.1
network.cookie.cookieBehavior
1
network.cookie.lifetimePolicy
2
network.cookie.prefsMigrated
true
places.database.lastMaintenance
1343365901
places.history.expiration.transient_current_max_pages
104858
places.history.expiration.transient_optimal_database_size
167772160
plugin.disable_full_page_plugin_for_types
application/pdf
privacy.clearOnShutdown.cookies
false
privacy.cpd.sessions
false
privacy.donottrackheader.enabled
true
privacy.sanitize.migrateFx3Prefs
true
privacy.sanitize.sanitizeOnShutdown
true
privacy.sanitize.timeSpan
0
security.OCSP.disable_button.managecrl
false
security.warn_viewing_mixed
false
Graphics
Adapter Description
NVIDIA Quadro NVS 290
Vendor ID
0x10de
Device ID
0x042f
Adapter RAM
256
Adapter Drivers
nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Driver Version
8.17.12.9573
Driver Date
2-9-2012
Direct2D Enabled
true
DirectWrite Enabled
true (6.1.7601.17789)
ClearType Parameters
ClearType parameters not found
WebGL Renderer
Google Inc. -- ANGLE (NVIDIA Quadro NVS 290) -- OpenGL ES 2.0 (ANGLE 1.0.0.1041)
GPU Accelerated Windows
1/1 Direct3D 10
AzureBackend
direct2d
JavaScript
Incremental GC
1
Library Versions
Expected minimum version
Version in use
NSPR
4.9
4.9
NSS
3.13.5.0 Basic ECC
3.13.5.0 Basic ECC
NSS Util
3.13.5.0
3.13.5.0
NSS SSL
3.13.5.0 Basic ECC
3.13.5.0 Basic ECC
NSS S/MIME
3.13.5.0 Basic ECC
3.13.5.0 Basic ECC

Chris Kewl 0 solutions 8 answers

Very interesting! Try to listen to this stream: http://dev.nexmix.com/trulocal/player/index-test.html

This was the issue I was having, where streams took a long time to load before playing. With 512 it should not take any time at all at a 12mbps download.

Also, after the change did you reboot?

Very interesting! Try to listen to this stream: http://dev.nexmix.com/trulocal/player/index-test.html This was the issue I was having, where streams took a long time to load before playing. With 512 it should not take any time at all at a 12mbps download. Also, after the change did you reboot?

Question owner

Yes, had to reboot to get UAC restored. I've just tried both radio stations (separately, of course) after having opened SAV and disabled Web Protection: both came on virtually instantly. Restoring Web Protection brought the delay back. So I think we have established that my problem

  1. Was caused by an update to Sophos AntiVirus
  2. Is affected by the figure in <contentSizeLimit>nnn</contentSizeLimit>
  3. Is not affected by deleting the item <item>audio/unknown</item>

But there are lots of other items, like octet-stream, in the mimeTypeList. Maybe it's one of them?

David

Yes, had to reboot to get UAC restored. I've just tried both radio stations (separately, of course) after having opened SAV and disabled Web Protection: both came on virtually instantly. Restoring Web Protection brought the delay back. So I think we have established that my problem # Was caused by an update to Sophos AntiVirus # Is affected by the figure in <contentSizeLimit>nnn</contentSizeLimit> # Is '''not '''affected by deleting the item <item>audio/unknown</item> But there are lots of other items, like octet-stream, in the mimeTypeList. Maybe it's one of them? David
Chris Kewl 0 solutions 8 answers

David, possibly. I would suggest to tinker around there and see what could be the issue. First, find the mimetype of the item you're looking to remove out of there. If it is YouTube, search for "YouTube MIME type".

In my search I came up with: application/x-shockwave-flash

Again, you'll have to do digging of items you wish to remove and see if that works.

Thanks! :)

David, possibly. I would suggest to tinker around there and see what could be the issue. First, find the mimetype of the item you're looking to remove out of there. If it is YouTube, search for "YouTube MIME type". In my search I came up with: application/x-shockwave-flash Again, you'll have to do digging of items you wish to remove and see if that works. Thanks! :)

Helpful Reply

Dear Chris (or anyone else familiar with Sophos).

I'm not thrilled about turning off what Sophos evidently see as a useful protection, so I haven't experimented with finding exactly what line to remove from factory.xml (quite apart from the nuisance of stopping services, turning off UAC, and rebooting twice for every test). By reducing the scan from 2048 to 512, I've mitigated the problem already. I would prefer to add the two problem radio stations to a whitelist so that those particular sources aren't sampled by SAV. Does anyone know if that's possible?

David

Dear Chris (or anyone else familiar with Sophos). I'm not thrilled about turning off what Sophos evidently see as a useful protection, so I haven't experimented with finding exactly what line to remove from factory.xml (quite apart from the nuisance of stopping services, turning off UAC, and rebooting twice for every test). By reducing the scan from 2048 to 512, I've mitigated the problem already. I would prefer to add the two problem radio stations to a whitelist so that those particular sources aren't sampled by SAV. Does anyone know if that's possible? David