Participant

質問

What is the difference between SWF and F4V in the context of Streaming or progressive Download?

Forum|Forum|15 years ago
November 29, 2010
返信数 2.
1826 ビュー

Hello everybody,

I am absolutely a beginner in working with Captivate and furthermore my technological know how is not that good.

So, I have problems to understand if the export formats SWF and F4V are both capable to be published in the Internet as streaming video and as progressive Download? Well so, I do not really understand the difference between streaming and progessive download either?

Furthermore I was asking myself if this issue depends on how I imported flash videos (there are these two options) in my Captivate project during the production phase?

I would be very thankful for some helping information!

Greetings,

Mareike the beginner

Import export

このトピックへの返信は締め切られました。

M

mareike_göldner作成者

Participant

Thanks a lot for your help! Right now, all my information put together makes sense and confirm my original impression!

Best greetings,

Mareike

Captiv8r

Legend

Welcome to our community

I'm not certain I fully understand the differences myself, but will toss out what I believe to be true about the formats. Hopefully, if I'm incorrect in my bellief, someone with more definitive knowledge will chime in.

It was explained to me a couple of years back and is my understanding that "streaming" only applies to a video based format such as F4V, FLV and it doesn't apply to SWF. With SWF, you may specify a preload value. So when the SWF transmits from the web server to the PC, a certain percentage has to be received before play begins. But that's not streaming. It's preloading.

For streaming to occur, the web server establishes a communication channel between the server and the destination PC. This channel is monitored to see what speed is in use. Only enough information is then transmitted to be comfortable at that speed. If the speed improves during the connection, the server serves data at a faster rate. If the connection degrades, the information transmitted is also scaled back so as to accommodate the lower speed.

With SWF, after it has all been downloaded, a savvy user is able to poke around in their temporary internet files and save the SWF for play later. With streaming, this isn't possible because as the stream is viewed, it evaporates from memory.

Seriously hoping others will chime in here to confirm or deny this.

Cheers... Rick

Helpful and Handy Links

Begin learning Captivate 5 moments from now! $29.95

Captivate Wish Form/Bug Reporting Form

Adobe Certified Captivate Training

SorcererStone Blog

Captivate eBooks

M

mareike_göldner作成者

Participant

Hi Rick,

thanks a lot for your answer! It is really difficult to find some information about that in the internet without just finding some really technological based information. In one German forum I read something nearly the same that you said.

So perhaps there will someone else to confirm your statement!

Thanks a lot again,

Mareike

Captiv8r

Legend

Hello again

It really is a shame that video has to be such a "black magick" sort of affair. It seems all fraught with mysterious CODECs and bit rates and formats and players. Sort of a wild wild west if you will.

Sort of makes one wonder if there isn't a conspiracy afoot to keep it mysterious so that those in the know can perform their magickal incantations and charge others an arm and a leg for doing so.

I like simple things... Rick

Helpful and Handy Links

Begin learning Captivate 5 moments from now! $29.95

Captivate Wish Form/Bug Reporting Form

Adobe Certified Captivate Training

SorcererStone Blog

Captivate eBooks