[Asterisk-video] MPEG4 part 2 video support

Michael (qq12345) qq12345 at web.de
Wed Mar 26 16:07:48 CDT 2008


Hi Sergio,

Firts, about licenses, they don't apply if you only recieve the mpeg-4
stream and store in an mp4, 
just the same as in the AMR licenes.  (for private use) 
 
You are right. But usually within business cases of companies, the story
continues.
And at a certain point of time some companies want to publish content, and
that is covered with royalties.
It is like Peer-to-peer software. Downloading is not the fact. Publishing is
the issue.
 
About video quality, I really don't beleive there is any significant gain
moving from h263 to mpeg4 part 2. 
I believe 50% but my colleague nailed me down to 10% for SP at L0. Perhaps it
depends on the content,
the bitrate, the targeted bitrate, and quantisation, etc.
 
mpeg4 part 10  (=AVC)  (h264) is another history, but there aren't many
handsets supporting it yet.  
Most new handsets from Nokia support it. They are already enabled for
DVB-H/T or whatsoever.
Since 2 years a lot of Nokia handsets have H.264 support onboard. 
 
CU,
Michael
 


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