| 22 Jun 2007 03:11 am |
Entree Rep: 0 Joined: 21 Jun 2007 Posts: 4 OFFLINE | in a video camera also should there be a video codec, if it is so, that codec should very small in size and have high performance. are they in software level or hardware level. so what are the available software video codecs for cameras and mobile phones..? are there any open source applications for this..?
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| 22 Jun 2007 09:05 am |
Regular Rep: 3 Joined: 20 Nov 2004 Posts: 1,239 | What are you trying to do? If you’re wondering how digital cameras capture their video, it’s all done in hardware (chips). Of digital camera movies I’ve seen, codecs in use include MJPG (Motion JPEG), MPEG-1, MPEG-2, MP4S and M4S2 (Microsoft ISO MPEG-4 versions 1 and 1.1), DivX (DX50 - usually Pentax and Casio), Photo JPEG, H.263, or Apple MPEG-4; these are usually in AVI ,QuickTime (MOV), or MPEG containers, occasionally in ASF.
I’m not very familiar with how cell phones do it, but I’ve seen some H.263 vids; 3GP and MP4 also seem more popular containers in that dept. A few cell phones that capture pics only can be made to capture videos (I think one such software was ETI camcorder for symbian phones - it captures a bunch of pics one after another to make them into a video).
More sophisticated portable devices that run actual operating systems (windows ce, symbian os, whatever) can actually download and run software codecs. google for more info on those.
Last edited 11 Jul 2007 12:17 am by anonymous | |
| 23 Jun 2007 12:56 am |
Entree Rep: 0Joined: 21 Jun 2007 Posts: 4 OFFLINE | i am involving in a project which is optimizing a existing video codec for narrow bandwidth streaming applications.
we wanna implement it for GPRS, so there are several open source video codecs. now a days we studding what is the best codec for this purpose. up to now we decided to select the Theora open source video codec.
pls anyone can give me an idea about this selection or any other good solutions.
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| 26 Jun 2007 01:03 am |
Entree Rep: 0Joined: 21 Jun 2007 Posts: 4 OFFLINE | please can anyone help me to know that the normal size constrain of a mobile phone video codec that is exist in software level.
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| 26 Jun 2007 01:22 pm |
Regular Rep: 3Joined: 20 Nov 2004 Posts: 1,239 | This is beyond the scope of this site. You might want to ask the people at doom9.org or multimedia.cx. They have much greater codec expertise at the programming level.
Last edited 11 Jul 2007 12:19 am by anonymous | |
| 10 Jul 2007 09:36 am |
Entree Rep: 0Joined: 21 Jun 2007 Posts: 4 OFFLINE | thanks very much for giving this instruction
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