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Timothy Gaer
3gp Compression
on Apr 28, 2010 at 5:27:32 pm

Hi,

I am working with a company that wants to put video on the ipad... We are using the 3gp format and are having issues creating a clean 720x480 image that will Play over the 3g network.

I am using MpgStreamclip to convert my videos and have so far come up with no solutions to give a clean un pixelated image... and I know it is possible as you can stream from ABC.com and NBC.com all of which are using a 3gp video codec.

Does anyone know how to get a 30 min program on the iPad using 3gp and the correct settings for this?

Timothy Gaer
http://www.timothygaer.com
http://www.imdb.com/name/nm3014735/
Everything will be MacTastic


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Daniel Low
Re: 3gp Compression
on Apr 28, 2010 at 7:10:56 pm

[Timothy Gaer] "I am working with a company that wants to put video on the ipad... We are using the 3gp format and are having issues creating a clean 720x480 image that will Play over the 3g network."

You are trying to run before you can walk.

Read this:
http://www.apple.com/quicktime/tutorials/h264.html

The 3G network is way too slow to deliver a 30 minute program at anything close to that frame size or quaklity

[Timothy Gaer] "I am using MpgStreamclip to convert my videos and have so far come up with no solutions to give a clean un pixelated image"

MPEGStreamclip is a great video utility program but if you want to transcode high quality video then you need to invest some cash in a dedicated transcoding application.




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Sent from my iPad Nano.


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Timothy Gaer
Re: 3gp Compression
on Apr 28, 2010 at 9:18:56 pm

"he 3G network is way too slow to deliver a 30 minute program at anything close to that frame size or quaklity "

We have been watching NBC.com and ABC.com via the iPad over a verizon MyFi which is 3G and that streams at 720x480 (Square Pixel) and is streaming 30 - 60 min shows... and the quality is amazing... so it has to be possible to do..... And I am assuming it is a settings issue.

"MPEGStreamclip is a great video utility program but if you want to transcode high quality video then you need to invest some cash in a dedicated transcoding application. "

We do have Final Cut Studio with Compressor and the quality difference between the two is minimal. We usually transcode our 60 min broadcast using MPG Stream clip and then send to Dish and Roku to play... I do not know how they deliver (as Roku is over the internet) and I am assuming they do a second transcode when they get our materials..... If you still think it is an issue with MPG Stream clip and if you consider Compressor in the same league as MPG Stream clip can you give me some suggestions for software that will do a better transcode?

Timothy Gaer
http://www.timothygaer.com
http://www.imdb.com/name/nm3014735/
Everything will be MacTastic


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Daniel Low
Re: 3gp Compression
on Apr 28, 2010 at 10:29:21 pm

[Timothy Gaer] "We have been watching NBC.com and ABC.com via the iPad over a verizon MyFi which is 3G "

Indeed, the Verizon 3G network (Actually CDMA/EVDO) with the MiFi bridge is indeed fast (600Kb/s - 1.4Mb/s), fast enough to stream SD sized content, so I stand corrected on that.

The thing to consider is that in order to get that kind of speed you are going to need to be on the Verizon network and probably in procession of a MiFi as well?

I'm from the UK so I don't know for sure but I heard that Verizon is not offering a service for iPad...

[Timothy Gaer] "If you still think it is an issue with MPG Stream clip and if you consider Compressor in the same league as MPG Stream clip can you give me some suggestions for software that will do a better transcode? "

Both compressor and MPEGSC use the Quicktime H.264 libraries, which are widely regarded as bottom of the pile when it comes to quality.

I'd recommend you take a look at Episode which uses Dicas H.264



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