DASH of this, DASH of that...

It's apparent that MPEG-DASH is getting traction—or at least attention—if attendance at the 2011 StreamingMedia West show's panel on MPEG-DASH is any indicator.

It wasn't just standing-room, as alluded to in the StreamingMedia.com article, but was sitting-room only. It's been quite some time since I've seen this level of interest in a topic.

A few notes that didn't make it into the article:


MPEG-DASH will never define a codec, but with DASH-264 there's a move to use an H.264 codec in an MP4 container with a common file format (CFF) and common encryption (CENC).... There's also a possibility of adding DASH-264 into the HTML5 standard, since W3C requires a codec to be considered in HTML5 but MPEG-DASH itself is codec agnostic.


Interesting note about who has been participating and who has not:


Apple has been participating in MPEG-DASH from the beginning; they have contributed actively. We've not seen Google participating in DASH, but our codec agnostic approach means that WebM could be used within DASH (we can already do with profiles around M2TS).


What about royalties? An audience member's question got this reply:

From a licensing standpoint, there is a requirement to notify ISO of their intent to license; Qualcomm and Cisco have announced they'll offer royalty-free since HTTP adaptive streaming has been done for a number of years but to get to a standard we need to see a path forward to royalty-free licensing.

Workflow - Trimming and Saving video clips in iPhone 3.1

For those with the iPhone 3GS, the new iPhone 3.1 software adds a much-requested option to its video recording and trimming capabilities.

Whereas iPhone 3.0 would permanently trim a clip (the "trim original" option) and erase the portions of the clip that were outside of the parameters of the trim bar, which made for some harrying moments if one weren't paying close attention to the trimmed clip, iPhone 3.1 adds a "save as new clip" option that creates a separate file while leaving the original video file intact.

We tested the feature on a 32GB iPhone 3GS, using clips shot both before and after the upgrade to iPhone 3.1, to see what surprises were in store.

First, let's start with trimming. The ability to trim video within the iPhone 3GS window is very intuitive: select either end of the clip and begin to dragging the trim bar towards the center. The bar will turn from gray to yellow to emphasize the fact that you've chosen to trim. Lift a finger and the trim bar stays where you placed it, and the process can then be repeated for the other end of the clip (assuming you want to trim both the beginning and the end of the clip).

Keeping a finger on the trim bar, anywhere other than the beginning or end of the clip, will result in the video automatically lengthening out beyond the end of the screen. Don't be frightened, as this is intentional: the lengthening is Apple's way of allowing fine-tuned trimming, especially handy for long clips that may be trimmed to 10-20% of their original length.

A note for those frustrated users: 9 times out of 10 during our tests, when we chose to start trimming from the in point, the positioning slider was selected instead of the trim bar, due to the fact that they're both in the same location. The 10th time we actually ended up hitting the "camera roll" button. We suggest turning the iPhone sideways, although this still resulted in numerous touches to the positioning slider, so we also suggest starting the trim from the end of the clip, which makes the positioning slider disappear.

Once the clip is trimmed to your liking, choose the yellow "trim" button to access the two saving options. Choose "trim original" to discard all the remaining video (both before and after your trim points) or "save as new clip" to just save a copy of the trimmed portion while leaving the original clip intact.

It's also worth noting that the new clip will be saved with the current time and date, while the "trim original" clips are saved with the original time and date. While this is understandable, it makes using the iPhone 3GS less effective for multi-shot recordings (such as a short film or news reporting) since one has to search for the original and new clips in different areas (especially if iPhoto, Apple's program of choice for importing still images and video clips from the iPhone, has the "auto split events after import" box checked for splitting imports by different dates).

Finally, while we assume this workflow also works for the new iPod nano's video recording capabilities, we've been unable to test with the new nano and don't yet know which version of the iPod software it uses.

Workflow - Aggregate and Export QuickTime Movies in Snow Leopard

This workflow may be better titled "getting around Apple's QuickTime Player X limitations" in a nod to a recent Bit of Tech review that notes the new version of QuickTime, named QuickTime X and completely rewritten for Intel Macs, is a bit lacking when compared to the Pro options in the old QuickTime Player 7.

In fact, compared to QT Player 7's Pro options, such as aggregating movie clips together (appending a second clip on to the end of another in basic "cuts only" editing) and the extensive list of export options, the QuickTime X player is a step backwards.

Fortunately, for those who upgraded to Snow Leopard (10.6) from the Leopard (10.5) operating system, Apple left QuickTime Player 7 intact, including the Pro version, if Pro was already installed on the old Leopard system. Whether this is an oversight, or a nod to the fact that QuickTime X was shipped too early, the fact that QuickTime Player 7 is still functional is welcome news.

The work-around workflow, then, for aggregating clips and exporting content to more than just an Apple TV, iPhone, iPod or Macintosh computer, is to use QuickTime Player 7 with Pro options.

If you've already upgraded and didn't have Pro installed at the time, you'll need to downgrade to Leopard, or find an alternate paid application, until such a time as Apple chooses to add back the functionality it stripped from QuickTime Player.

Workflow - iPhone 3GS video export to iTunes vs iPhoto vs iMovie

[For more on QuickTime X and its limitations, see this Bit of Tech article and the export workflow on workflowed.com]

The new iPhone 3GS, and the most recent iPod nano, are both touted by Apple as easy-to-use video cameras. Capturing video is relatively straightforward: press the camera application, slide the slider from camera to video, turn the phone sideways and press the

Even trimming and saving files, at least in iPhone 3.1 and beyond, is easy; the new iPhone 3.1 software adds an option to "save as new clip" to the original "trim original" option.