Wesley Alan Wright: Notes, Lessons, and Projects

Assuming application source is in current working directory “../NewApp” …


sudo service red5 stop
rm -rf $RED5_HOME/webapps/NewApp
ant
mv dist/NewApp.war $RED5_HOME/webapps/
sudo service red5 start


sit back and wait a few minutes for Red5_Scheduler_Worker to find .war file, unpack and install

Read error messages, fix, repeat

Now, if I could just figure out why the directory structure of NewApp is so confusing…

First, look at documentation

http://drupal.org/handbook/modules/ldap_integration

Next, download the right module for your Drupal version

http://drupal.org/project/ldap_integration

For me it was ldap_integration-6.x-1.0-beta1.tar.gz

Expand compressed package, unpack archive


gzip -d ldap_integration-6.x-1.0-beta1.tar.gz
tar -xvf ldap_integration-6.x-1.0-beta1.tar


Move ldap module into drupal. Assuming tar file was expanded in drupal folder, simply

mv ldap_integration modules

Now we go to Drupal=>Administer->Site Building->Modules

Scroll down to bottom, enable LDAP Authentication. Optionally select Data and or Groups if you want to have real fun.

OK, now go to Drupal=>Administer->Site configuration->LDAP -> Authentication . The only thing you might change is Authentication Mode LDAP only

From same screen, choose Add Server. Use these settings

Client asked me:

I am working on this new project involving testimonies. I already made a video of interviews that I roughly edited, but I want to extend the project “to the world”, digitally. So I thought that you could help me with the creation of a basic computer program with which people can answer questions while being recorded in a computer. I would take this program to many venues and cultures and then, I would put together the answers in video films. What do you think?

So the program would do something like this:

– The person sits in front of a computer and the computer presents him/her with the following options (I am improvising here):

1. Please, adjust you image to the camera and say your name and place of origin.

2. Say your birth date (optional).

3. Please, read the following authorization release. This is only for the purpose of the project… (this can be place at the end of the recording….

4. Please, click on the questions below and answer them at your own pace.

etc…

Client is a Macintosh user, and so am I, so I started looking at my options:

• Applescript Quicktime Player?
• Flash?
• Xcode
• Java App?

It’s been months since I first started his assignment, so I don’t recall in what order I examined solutions and either discarded or investigated more closely and why. But I finally ended up with XCode. I figured it would be a good learning experience.

And it was — to a point. Found some good tutorials that got me started, and I was able to get a feed from my iSight on the screen in fairly short order. And then got stuck. Figured the camera would be the hard part, but in fact it was the text box where the question would appear that stumped me. Banged my head against it n and of for several weeks, slowly forgetting everything I learned at the star of the project, until I finally backburnered it indefinitely.

Finally the client called me and asked how’s it going. Not, I said, but I would look again. Revisited the same options, this time encouraged by the YouTube and Facebook use of Flash. Tried to pirate their Flash apps, but they wouldn’t work outside the context of their own web pages.

I liked the idea of a web based plug-in of sorts for the camera, since once that was done all the text and interaction stuff would be easy, known territory. So now I tried to become an ActionScript programmer.

[Side observation: large IT corporations should not be allowed to develop programming languages. Visual Basic sucks. AppleScript sucks. ActionScript sucks. Java sucks. I long for the days of ANSI Fortran or even C.]

Anyway, masterful googling revealed some examples in the Adobe ActionScript on-line documentation that got me started. I slowly learned that Flash would only send it’s captured video back to a Flash Media Server. I discovered Red5 and Wowza. I discovered to my dismay that Flash would only use the Sorenson H.263 Spark video codec and the Nellymoser audio codec. I really wanted h.264. Too bad. I really wanted MP4, too, but all I could get was FLV. Drat!

My final frustration and triumph was getting the sound and video to sync when viewing the resulting FLV files in QuickTime Player with the Perian universal codec package. The audio track was consistently shorter duration than the video, and seemed to be missing a second or so at the start. Yet when viewed in VLC player or in my Wowza Videorecording Example derived ActionScript code, the first second or so of video seen in Quicktime player was cut off, thus rendering the audio in sync.

I finally hit upon the cure (combination of dumb luck, trial and error, intuition derived from 25+ years of experience): insert a small delay, about 2.5 seconds seemed to work well, between my calls to nsPublish.attachCamera, nsPublish.attachAudio, and nsPublish.publish:

nsPublish.attachCamera(camera);
nsPublish.attachAudio(microphone);
nsPublish.bufferTime = 30;
Wait.text=”Wait for my signal……”;
Wait.opaqueBackground = 0xFF0000;
myTimer.start();

function timedFunction(eventArgs:TimerEvent) {
myTimer.stop();
nsPublish.publish(nameStr.text, (AppendCheckbox.selected?”append”:”record”));
Wait.text=”Start talking!”;
Wait.opaqueBackground = 0x00FF00;
}

Worked like magic.

So the Flash App is written to by default capture 30FPS 640×480 standard definition video at maximum quality and bitrate and send it to a flash media server running on localhost. FPS, width, height, quality settings, and IP address of remote FMS can be configured by FlashVars in calling HTML.

Full example at http://www.uvm.edu/~waw/archives/tina

I compared three similar pocket digital video recorders. My two simple evaluation criteria were “plays well with UVM basic web servers” and “plays well with iMovie.” Conclusions:

1. The Kodak ZX1 plays best with UVM servers: video clips can be uploaded direct from camera to server and viewed on the web with no post-processing (conversion, reformat, resize, or edit).
2. All played equally rough with iMovie HD (the original version, iLife 06 and earlier)
3. All played equally well and shared nicely with iMovie 09 (and presumably with 08 as well)

Flip Ultra:

• Saves files natively in .AVI container using an MPEG-4 codec
• Officially — meaning they give you an installer for it — the codec is of the XVid variety, and 3ivx in particular.
• 640 x 480; 30 fps, about 4.3 mbits/second
• You can upload .AVI files direct to www.uvm.edu. Will play if client machine has 3ivx or DivX installed. If not installed (but QuickTime is), prompted to get additional components for Quicktime; specifically, the Xvid component. However, installing Xvid component for Windows still did not allow .AVI file to be played using QuickTime browser plug-in. So, raw files not quite ready for web, need post processing
  Example AVI
• comes with an application preloaded on drive for editing and sharing videos. When launched, prompted to install 3ivx codec, even if Divx already installed. Apparently it wants that installed before it will run.
• Once it does run (FlipVideo For Mac, that is), it immediately asks if you want a free upgrade. I said no, for now, just to see what’s what
• Chose Public Online Sharing for Upload to Other Websites. Took ForEVER for 1 minute movie. Produced 496 x 370 pixel; 30 fps; 840 kbit/second .MOV file using QDesign Music 2 (16 kHz) and Sorenson Video 3 codec. Yuck. Where’s my MP4 format go? Also note: movie NOT set for progressive download!
  Example MOV
• Restarted FlipVideo For Mac, took them up on offer to install FlipShare (100 Mb download)
• Installed FlipShare, which in turn launched App, which in turn updated flash drive on Flip with new software
• Launched FlipShare. Chose Share… Online… Other Websites. Produced 640 x 480 pixel; 30 fps; 1171 kbit/second .MOV file using u-Law 2:1 (16 kHz) and H.264 codec.. This is an improvement, but once again movie NOT set for progressive download!
  Example MOV

Flip MinoHD:

• saves in .MP4 container, Quicktime claims file is video: AVC Coding (another name for H.264), 1280 x 720, Millions Colors, Audio AAC Mono, 44.100 kHz, a whopping 10.43 mbits/s
• Apparently, though, movie is STILL not “optimized for internet” or “flattened” or otherwise ready for Progressive download.
  Example MP4
• Post processing via QuickTime Pro: Export as MP4, select options, Video codec set to passthrough, audio to passthrough, streaming set to enabled produces a file claimed by Quicktime to be video H.264, 1280 x 720, Millions; audio AAC, Mono, 44.100 kHz, still 10.43 mbits/s. Progressive download now works fine.
  Example MP4

Kodak ZX1:

• records in 720p HD or 480p SD (VGA). Also records in 720p HD 60 fps, but that mode wasn’t tested.
• saves in .MP4 container, Quicktime claims file is video: Ambarella AVC encoder, either 1280 x 720 (HD) or 640×480 (SD), Millions Colors, AAC, Stereo, 48.000 kHz, and a staggering 11.16 mbits/s for HD and 2.663.30 mbits/s SD
• Amazingly, movie IS “optimized for internet” or “flattened” and otherwise ready for Progressive download!
  • Example MP4 HD
  • Example MP4 SD
• Post processing via QuickTime Pro: Not Necessary!

Import into iMovie HD (version 6.03, iLife 06)

• started with iMovie HD (version 6.03, iLife 06). Created new project of type MP4.
• Dragged original Flip Ultra AVI into project. I waited while iMovie “down converted” from [DivX 6.0, 640 x 480, Millions Microsoft ADPCM, Mono, 44.100 kHz 4316.74 kbits/s] to [AAC, Stereo (L R), 48.000 kHz Apple MPEG4 Decompressor, 640 x 480, Millions 991.62 kbits/s]
• I used QuickTime Pro to export original as H.264, using mostly default settings and 640×480 dimensions. Resulted in [AAC, Mono, 44.100 kHzH.264, 640 x 480, Millions]. Dragged this into iMovie, it instantly copied file to project with no modifications
• I dragged the original Flip MinoHD MP4 file into project. I waited while in down converted from [1280 x 720 10.43 mbits/s.] to letter boxed 640×480 981.27 kbits/s.
• Created new project of type MP4.
• I dragged the original Flip MinoHD MP4 file into project. iMovie crashed. Tried again, same results as above — down converted from [1280 x 720 10.43 mbits/s.] to letter boxed 640×480 981.27 kbits/s.
• Clearly, new project of type MP4 is inappropriate for the MinoHD. This time tried HDV 720p
• I dragged the original Flip MinoHD MP4 file into project. iMovie up converted from [1280 x 720 10.43 mbits/s.] to [16-bit Integer (Little Endian), Stereo (L R), 48.000 kHz Apple Intermediate Codec, 1280 x 720 (1248 x 702), Millions] and a mammoth 32.75 mbits/s. My 91.75 MB MP4 was now 288.15 MB. I don’t know where the (1248 x 702) is coming from. Yes it works, but still not ideal.
• Now for the Kodak ZX1 files. Same results as with MinoHD

iMovie HD does not handle these cameras as well as it handles an old-school DV camera.

Import into iMovie 08/09

This is a whole different kettle of fish. MacOS and iLife treat these cameras as Still cameras, not video cameras. Hook one up to a Mac, and iPhoto launches and imports movie (and or still) clips. These are registered as “Events” and generally sorted by dates embedded in the photos (Strong Hint: Be sure your camera has the proper Times and Date Set!!).

iMovie has an Event Library Panel. Import from a file or DV camera can be set to create a new Event or add to an existing event. There is also an iPhoto Videos Event. Choose that, find a video in an iPhoto Event, drag it straight into project, watch immediately. Additionally, if you select import and navigate to your iPhoto Library, you can find the movie clips in iPhoto Events and import into iMovie Events.

Bottom line: iMovie 08/09 is far superior to iMovie 06 in terms of working with this class of cameras — if you can tolerate the remainder of the iMovie 08/09 user interface.