Different Video Codecs (AVI, WMV, MPEG Etc.)

Discussion in 'Application Ideas' started by jentybhullar, May 7, 2008.

  1. jentybhullar

    jentybhullar New Member

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    PLAY AVI, WMV, MPEG Etc!! (RELEASED)!!!!!

    EDIT: IT'S OUT!!!!!!!!!!!!!!!!!!! YAY!!!!! BEER FOR EVERYONE!!!
    http://www.modmyifone.com/forums/news/182421-vlc-iphone.html

    i just thought of this idea because every time i download some movie or episode, i have to convert the video to MP4 first

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    .. so i was wondering if it's possible to install different codecs on iphone/ipod so you can play different video extensions without converting them first. it'll also be cool to do same with the audio files. if ipod music/video player doesn't support this, then may be have a completely different player like VLC player for windows. http://www.videolan.org/vlc/ for more info. is it even possible?

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  2. optimo

    optimo New Member

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    the most important thing to understand is that the filename extensions are container formats. the encoded video within may be of a dozen formats

    like with the new h264/mp4, xvid AVI's and WMV have a wide range of encoding features and postprocessing. The iphone/ipod has a tailored decoder tuned to work with a severely restricted version of h264/263. it's simply a matter of the capability of the chipset. most pirated AVI's contain an advanced set of codec for h263/xvid, including intensive math functions and post processing. Even your off-the-shelf DVD ripper by default is setup to author for stronger decoders.

    in other words, its not as simple as saying 'lets write a codec', when the device is not equipped to handle advanced video codec.

    in fact, the restricted version of h264/mp4 that the device supports is greatly crippled. compare these to h264/MKV an up-and-coming PC format with a slew of advance techniques for encoding/decoding. compare the measely 400MHz chip in iphone to the 2+GHz full-featured processors needed to decode advanced codecs, including full-WMV9 and VC1, and of course full-h264

    PS: those most severe restriction is the bitrate throughput of the soft-chip inside
  3. xxjustinxx

    xxjustinxx New Member

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    Yea that would be sick but with soo many projects being worked on I doubt this will come out anytime soon...
  4. jentybhullar

    jentybhullar New Member

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    thnx

    ok thnx optimo... but atleast a low resolution (320x240) avi or wmv would be able to run on a 400mhz chip wouldn't it? and also for audio files, wma should be possible?
  5. optimo

    optimo New Member

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    theoretically, yes
    but who has 320x240 AVI or WMV lying around? if you are going to encode a video for yourself, you may as well use h264/mp4. take note, while resolution is indicative of the performance generally, the bitrate is the most important factor in determining the throughput of the process, followed by the cpu-intensive deblocking

    WMA audio should be possible now, that's one to keep up hope
  6. jentybhullar

    jentybhullar New Member

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