Archive

You are currently browsing the Scott Morgan blog archives for January, 2008.

Jan

30

Yahoo releases Astra v1.1.

By scott

My former peeps over at Yahoo just released 10 more components, 3 Flash and 5 Flex components. The also fixed some of the bugs that the community reported in the existing components.

For the Flash world Astra now contains an AlertManager, an AudioPlayback component, and a MenuBar component that works with the existing Menu component released in Astra 1.0.

For the Flex folk the kind gents on the Yahoo Flash Platform team have created an AutoCompleteManager, a few different ColorPickers, an IPV4AddressInput, a TimeInput component, and a TimeStepper component.

Nice work guys, and now that I am not part of the team and a user of Astra I say thank you for all your hard work.

Jan

24

Eat In Tax at McDonalds WTF???

By scott

Eat in tax?Since it won’t stop raining here in Southern California I brought the kids to the McDonalds in Burbank yesterday to burn off some energy in the play land. We ordered a couple happy meals with the incredibly shrinking cheeseburgers and I ordered a meal. While the kids were traveling through the miles of urine scented plastic caves I looked down at the receipt, to my surprise there was a one dollar “Eat in tax”. I have never noticed that before, I usually don’t study the receipts at McDicks but come on. Was there a VIP section with leather furniture that I somehow overlooked? Does McDonald’s charge this everywhere? I guess next time I will order it to go and bring the bags into the playland.

Jan

23

Why is my progressive H.264 video not playing until the entire file is downloaded.

By scott

Now that H.264 video is supported in Flash Player 9.0.115 and FMS 3 is on the horizon we are getting ready to flip on the HD switch in our video player. We have been lucky enough to try out a few beta releases of FMS 3 and have had great success with streaming H.264 video without too many changes to our core video player component (both AS2 and AS3). However, I ran into an issue yesterday with progressively downloaded H.264 video. The video would play but it was not progressively downloading, it would download the entire file before it began playing. Not the user experience we were looking for. The files played fine in Quicktime, and they played fine in Flash when streamed from FMS 3, just not progressively.

Time to hit Google. I found a few postings, not many, probably not too many people using H.264 yet (so I thought). Turns out the problem lies within the encoding of the file and where the “moov atom” is stored. The moov atom is essentially the header information of the file. To progressively play a file this data is needed before the first frame of video can play. This data contains the appropriate meta data the NetStream class looks at when determining the length, size, etc of the video. The moov data in my .mov files were stored at the end of my videos and that is why the video wouldn’t play until the entire file was downloaded. The moov data needs to be at the beginning of the file in order to progressively stream video.

I figured others must have run into this issue and someone must have wrote a utility to move the header bytes from the end of the file to the beginning. Byte manipulation isn’t rocket science, close, but not quite. While searching I found an interesting tech note on the Adobe site and it turns out Adobe’s own video editing software is to blame for this. The quote below is pulled directly from the tech note explains the issue.

One important thing about playing an H.264 video file as progressive download is that the moov atom needs to be located at the beginning of the file, or else the entire file will have to be downloaded before it begins playing. The moov atom is a part of the file that holds index information for the whole file. Unfortunately, tools such as Adobe Premiere and After Effects place this information at the end of the file, but Adobe is working to fix this in a future update to the CS3 video production tools. This isn’t an issue for streaming the H.264 video files, however, so Flash Media Server users can breathe easy.

Why didn’t Adobe address this issue? Obviously they rushed this feature to market, Silverlight supported H.264 video and everyone was raving about it. I don’t know if Silverlight progressively streams H.264 video when the moov atom is at the end of the file or not. Can anyone confirm? Or maybe this was some sick marketers ploy to entice users to buy FMS 3, i doubt that but conspiracy theories are so much fun.

Scouring the web I did find a utility that moves the moov atom to the start of the file. Renaun Erickson ported a C app to AIR that moves the moov atom and resaves the file. Very impressive! Unfortunately it didn’t fix my issues, Renaun’s app only works with .mp4 files and the files I was working with are .mov files. Using Quicktime Pro I exported one of the .mov files to a .mp4 to see if Renaun’s app would then move the moov atom. Still no luck. As a last resort I tried a simple Save As from Quicktime to see if it would restructure the bytes so the moov atom was at the beginning of the file. Guess what, it worked! My progressive downloads now worked. I created a simple batch and saved out all my progressive videos using Quicktime.

It baffles me that Adobe would not have put more thought into this problem especially when their own software is the culprit. They talk about CS3 suite integration and this is the furthest thing from that. Adobe mentions that they will be releasing a CS3 update to address the issue, hopefully sooner than later, unfortunately this does not help people (like me/us) who already have hundreds of H.264 assets with the moov atom at the end of the file. Re-encoding the video would be a huge process, we are already using the video assets for other streaming services, now that Flash supports H.264 we were hoping for an easy switch to our Flash video player. Most of our video is streamed, and that works great, unfortunately the progressively downloaded video wasn’t an easy switch.

In the end, the video looks great! Watching 1.2mb and 3mb fullscreen video in Flash is unreal. Now if we could just get support for variable bitrates!!

Jan

4

Another Reflection and Prediction posting - Happy 2008

By scott

Well it’s a new year and I have held off posting anything. I didn’t really have a lot to say and I am not one to blog about nothing. A TV show about nothing was a huge success, but I can’t see a blog about nothing doing as well.

The past year has been a roller coaster for me and my family to say the least. We moved twice (4 times if you count corporate housing stops), one move was into a completely different country, I started 2 new jobs (Yahoo! and now Disney), my son went to 2 different schools, and somehow my wife found the time to get pregnant with our third child. So that means we won’t be resting anytime soon.

Looking back I wouldn’t of changed a thing as crazy as everything was. I learned so much professionally and personally. Professionally I have grown, my coding has improved greatly, for the most part I have been strictly working in AS3 and have absolutely no desire to turn back, unfortunately legacy code exists and AS2 will never go away, not for a long time anyway.

One of the best things of last year was working with Papervision, it has opened up a whole new world (or dimension) to me. I am a developer but I do have a creative side and being able to merge both halves of my brain using something like Papervision is truly amazing. Introducing the third dimension into interface design improves user experience because as humans we are trained to work with objects in 3D space and building everyday metaphors into the UI of our apps will make them that much better. Now if we could just get rid of the keyboard and mouse it would make obtaining those metaphors a lot easier. I think we are going to see a lot more 3D in the RIA space in 2008.

Last year we were all introduced to the iPhone, I am not going to drone on about it, but it truly is a great piece of hardware and software. Sure it is missing a few key things, but it is only a first release. Early this year Apple is releasing the iPhone SDK, you know engineers will be all over this SDK and it will only be a matter of time before some really cool apps and extensions are released for the iPhone. There is already a GPS extension in the works, GPS is the only thing I miss about my old LG phone.

So what else do I see happening in 2008. This is not a political blog so I won’t go into how I see the global economy switching from the U.S. dollar to the Euro, and I won’t go into the recession that everyone seems to be poo pooing which personally I think has already started. I also won’t go into how the Big 3 American car companies are digging their own graves and how the auto Unions are holding the biggest shovel. My all Chrysler employed family may disown me if I talk down the unions, oh wait, I think I just did.

2008 should be an interesting year from an RIA standpoint. There is a lot coming down the pipe. AIR is the first thing that comes to mind. Adobe has done a great job with AIR, I am just not sure how well it is going to take off out of the gate. In its current state it is a cool toy. I don’t think it is going to flop, I just think it will take a little time to fly, and maybe another major release. Personally I don’t agree with the whole AIR run time. I have used both mProjector and Zinc in the past to wrap swfs and create desktop applications. Both of these products allow you to create cross platform (Mac and PC, no Linux love) stand-alone apps with the Flash player included in the executable (if need be). These products had more hooks into the OS and file system, what they didn’t have was an embedded version of Webkit and a JS API. They also didn’t have the ability to interact with PDFs. So yes, AIR has it’s advantages, I just don’t agree with the runtime, it just adds a level of unnecessary complexity and doesn’t easily allow for easy deployment. IMHO. The apps should be stand alone so you can burn them on a CD and have them just work.

I mentioned the iPhone SDK already, this will be huge, of course people are going to try and monetize off of this, why wouldn’t they. What I am really hoping, as are most who are reading this blog, is the iPhone Flash Player we’ve been all dreaming about. There are rumors, lots of them, unfortunately only one guy (and probably a few hundred others) know for sure, Mr. Jobs, please enlighten us. The Internet on your phone is still a little watered down, you promised me the real internet in your ads, where is it? I know there would be memory issues, let’s face it, there are some very heavy flash sites out there. Already I have seen Safari on the iPhone close/crash when an image heavy page is loaded. By now I am sure most of you have heard about QVM or tamarin-tracing, could this be the beginning of something huge?

What else, Flex 3, all I have to say is wow. If you haven’t played with the beta do so now. The profiling and refactoring alone will blow you away. Flex has taken off big time, the one thing that puzzles me though is the number of recruiters who contact me with Flex work yet I still don’t see a ton of it out there in the tubes. Some of the jobs are with Fortune 500 companies. Either they are taking their sweet time to launch their “next big thing” or they gave up on using Flex because they couldn’t find the talent.

This year we will also see the Flex framework fully open sourced. Thank you Adobe, this is really going to change the landscape. Maybe we’ll finally see an AS3 decompiler.

EcmaScript 4, this is going to be an interesting one to watch. There has been a lot of rumblings from a few of the big players. Microsoft doesn’t like it. Once again, Microsoft and Adobe will be at each others throats.

IE8 will be released, yawwwwwwn.

Thermo, Astro, Buzzword oh my. H.264, Google Gears, WPF, it’s shaping up to be a good year. I have even heard some rumblings from the Cold Fusion camp, sounds like there is going to be some cool stuff coming from them.

I am not one to make resolutions, I believe if you have to wait till the beginning of the year to make a resolution you’re not very motivated. But this year I want to expand my horizons. I want to get into other technologies, I have played with a lot of things but I want to go beyond playing. Things like Ruby, Gears, Python. I want to get dirty with SQLlite. I also want to contribute more to the Open Source community. I also don’t want to move, don’t want to start a new job and maybe want to take a vacation for the first time in 4 years. We’ll see how much of this list I get to, with a third child on the way it could be tricky.

In closing, Happy New Year to all, I hope you and your families have a great 2008.