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Space Forum / Shuttle / April 2009Webcast delay?
I put the webcast almost 11 minutes after the actual landing time. Time on my computer was 6:24am (3:24pm KSC time). >I put the webcast almost 11 minutes after the actual landing time. Time on >my computer was 6:24am (3:24pm KSC time). Are you saying that you saw the landing at 3:24 pm EDT? Must have been a replay, or else the clock on your computer is way off. I had NASA TV running on both my computer and my TV the other day, and noticed that the webcast was running 15-20 seconds behind the live TV broadcast. Patty >> I put the webcast almost 11 minutes after the actual landing time. Time on >> my computer was 6:24am (3:24pm KSC time). [quoted text clipped - 7 lines] > > Patty I have noticed that the feed that is for Windows Media Player that comes through yahoo is has a delay of between 30 secs and a minute. I had the Nasa countdown clock running on my machine when Discovery launched, the clock reached zero about 45 secs before the vehicle showed to launch on the video feed. I watched the Kepler launch about 2 weeks earlier with the same result. I guess the video feed may have a built in delay just in case there is a disaster on launch. Jim > I guess the video feed may have a built in delay just > in case there is a disaster on launch. It has nothing to do with NASA. It is just standard internet delays. It happens to all live events that are webcast > It has nothing to do with NASA. It is just standard internet delays. > It happens to all live events that are webcast Packet delays within north america range from 20 to perhaps 150ms. However, NASA is now using akamai to distribute content, so the content has to be first sent to akamai from nasa, then akamai needs to propagate it to different servers aroun the workd before packets can be sent over to end users. Also, the generator needs time to process the feed. Sophisticated compression needs to look at a whole frame or even a set of frames to know how to compress it. Even before the akamai distribution, getting 30-40 second delay on real video was common. This is not internet propagation delay, it is just the time taken to process the data. > behlin...@gmail.com wrote: > > It has nothing to do with NASA. �It is just standard internet delays. [quoted text clipped - 14 lines] > video was common. This is not internet propagation delay, it is just the > time taken to process the data. the delay is also present on satellite tv, local feed to backhaul to satellite provider who compresses it, sends it to satellite in geo sync who sends it back to the dish on my deck and descrambled on my tv. all that takes time even at the speed of light > I have noticed that the feed that is for Windows Media Player that comes > through yahoo is has a delay of between 30 secs and a minute. I had the [quoted text clipped - 3 lines] > same result. I guess the video feed may have a built in delay just in > case there is a disaster on launch. And what exactly would be the point? If something happened it would be all over the news within minutes anyway. > Jim  SignatureGreg Moore Ask me about lily, an RPI based CMC. Certainly there is always a greater delay on the Win media than the real player feed but not that much! They ran replays almost immediately for some 10 mins or so, so maybe you were asleep during the actual landing? grin. Brian SignatureBrian Gaff....Note, this account does not accept Bcc: email. graphics are great, but the blind can't hear them Email: briang1@blueyonder.co.uk ______________________________________________________________________________________________________________ >>I put the webcast almost 11 minutes after the actual landing time. Time >>on [quoted text clipped - 8 lines] > > Patty > Are you saying that you saw the landing at 3:24 pm EDT? Must have > been a replay, or else the clock on your computer is way off. > > I had NASA TV running on both my computer and my TV the other day, > and noticed that the webcast was running 15-20 seconds behind the > live TV broadcast. This seems to be the norm. I notice it a lot especially when I am watching jewelry shopping channels. It's really annoying when you are trying to buy something on auction, because if you pay attention to the webcast more than the tv, the items get sold out before you get to them Ah, knowing those webcasts, theycan turn it into something even longer than 90 days. You end seeing the webcast after you start paying for the delayed financing charge mk5000 ----- Original Message ----- From: "marika" <marika5000@gmail.com> Newsgroups: soc.rights.human,soc.culture.arabic,alt.fan.howard-stern,alt.education,alt.radio.talk,alt.usenet.legends.lester-mosley Sent: Monday, March 30, 2009 8:03 PM Subject: Re: Dying Forsaken American Soldier Families - BAILOUT BONUSES FOR BILLIONAIRES - DEPRESSIONS FOR THE NOBODIES - NWOer Jones: Don't blame Bush the decider - Cheney: Don't blame Bush either - George Noory: Oh what a happy day to see you suckers die this way >> Geithner's Toxic Debt Plan So Good, >> Citi and BofA Can't Wait to Get Started [quoted text clipped - 15 lines] > We're all smiles > Then, honest, I swear, it's the turnstiles "--morrissey |
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