Tuesday, October 14, 2008

Mac QuickTime and QuickTime Web Plug-In Repair Note

This document is in the progress.

I am presently having QuickTime plug-in not playing certain type of video formats. It launches the QuickTime player from the browser both in Safari and Firefox but it does not play the actual movie. Presently below are the notes I am taking for what to do to fix the issue.

Check The Location of The QuickTime Plug-In

Plug-ins are located under /Library/Internet Plug-Ins There is the same directory under ~/Library/Internet Plug-Ins as well. On a fresh out of the box Macs neither locations contain anything. 

Check the QuickTime CODEC Installations

Extra and third party CODECS ones are usually installed at /Library/QuickTime

Popular CODECS and CODEC Utiity download sites:
Repair The Disk Permissions, Re-Install QuickTime

Some internet posts suggest that we need to preform the disk permission repair, reboot, re-install (the latest version of) QuickTime and re-repair the permission and reboot. To do the repair type in "Disk Utility" in Spotlight query filed (the magnifying glass stuff on top right of the Finder) then run the Disk Utility. 

There is a Fast Aid tab and in there you will find "Repair Disk Permissions" button. 

It takes about 3-4 minuets to run on a relatively new Mac (without much software installed) in my lab. 

Mobile Me iDisk Does Not Mount on Windows XP

I know I can use Map Network Drive feature on the Windows to mount iDisk using the Mobile Me credential, however when I type in my user name and password, it does not accept and it won't mount (map) my MobileMe iDisk volume (this is also true basically for most other WebDAV mounts.)

You must explicitly click "Connect using a different user name." in the dialog box. There is some but a distinct difference between doing this first. Without doing this, you will still be asked for user name and password but that won't work even if you provide the correct user name and password of your Mobile Me account.

Mobile Me and iDisk is a great tool for me because I use Mac at home and XP at work and I often need to bring documenting work back and forth home and office. With remote desktop capabilities rampantly available, I no longer carry my laptop around. I just drag and drop files and continue to work at all locations.

Friday, October 10, 2008

QuickTime Plug-In Playback Jittery At Times


You have a page with a QuickTime plug-in using JavaScript with the AUTOPLAY and LOOP parameter set to TRUE and you are trying to view QuickTime movie embedded in the web browser on Safari (or any other browser). At times the movie plays back very jittery, but if you manually press the stop button and play button on the embedded QuickTime player, the jitteryness goes away completely (in my case we are sending AVI movies to it.)

You know there is nothing wrong with the movie file that was on the server because if you save the movie locally from the plug-in or make a copy of the file directly from the server and play it back it plays back normally.

Root Cause:

It appears that this problem occurs in the following manner:
  • The web server starts to send part of the movie
  • The QuickTime Plug-In starts to play any playable part
  • But the play head catches up with the download
  • The playing become jittery after that even even in the subsequent looping of the movie clip
Workaround Fix

In our case, we are not sending sound so we activated another QuickTime Plug-In parameter PLAYEVERYFRAME to TRUE. This may not completely fix your problem, however, at least by giving this a try, and the movie would play smoothly after it downloads all the frames then you know you have the exact problem as I had.


It appears that the reason this happens is that the plug-in will auto-adjust the play-back skip rate to preserve the audio playback sampling rate. Another way to try this is to set AUTOPLAY to off and try to play at different wait time (from almost no buffering to buffered full) and see you can duplicate this on your specific situation. This problem was worst when running on the Mac Safari on my MacBook Pro 17-in and lest on Microsoft Windows IE 7 under Windows XP. Also when the web server and video generation was on a very fast server this did not occur, but on a slower server this occurred more frequently.


Look in the latest Apple QuickTime Plug-In documentation (Google for) QTScripting_HTML.pdf for more information.

Time Took To Fix This

It took about 6 hours of time in front of the computer, visits to my customer site at night to qualify what is going on.

Tuesday, October 07, 2008

Windows SharePoint Services 3.0 Enabling Anonymous Access

The Problem:

You are trying to enable the anonymous access to your Microsoft SharePoint Services 3.0 site. You cannot figure out how.


The Microsoft document (Enable anonymous access) on this is not clear on this. The document assumes that your system or sharepoint administrator has already done additional footwork, and describes the last few steps within the Site Actions part of the Sharepoint

There is (seems to be) a few more steps that needs to be done.

  1. Terminal service or console access your web server's OS as an administrator.
  2. First, IIS itself should allow anonymous access. This is done through the IIS administration feature (typically accessed from "My Computer->Manage").
  3. Open the proprty of the SharePoint IIS web, select the Directory Security tab, then press the Edit button for the "Enable anonymous access" to allow the IIS to access. 
  4. When that is done, you need to go to the SharePoint Cnetral Administration web site. The easiest way to get there is from the IIS Manager then right click over the SharePoint Administrator web and select Browse.
  5. When the Central Administration page opens, select the Application Management tab.
  6. Look for "Authentication Providers" item, then you will find the Anonymous access enable check box on that page. Save it.
  7. Now log into your SharePoint page and then select Site Actions -> Site Settings and then select the Advanced Permissions. These steps are as described in the above mentioned Microsoft article, but you should now see Enable Anonymous permissions under the Settings menu bar.
Time Took To Find This Answer:

I spent about an hour trying to find this answer. The fact that anonymous enable is more or less "hidden" under "Authentication Providers" was a bit trickily for me. The reason I need to do this is that in my company the top page is accessible to anyone in the company whereas the individual department or other "site" will be secured.