[Mp4-tech] Fw: Regarding codecs supported by Mp4 file format

[Gomathi R]

Thanks a lot Liang.....

Actually I'm going to parse the .mp4 file and have to extract audio n video streams seperately to give as input to the corresponding decoders.ie.I'm going to write the code for Mp4 parser according to 14496-part 14.

so for example if the .mp4 contains mpeg-4 video i will read 0x20 as ObjectTypeIndication,then i ll extract the DecoderSpecificInfo as the header for .m4v file(as per 14496-2) and after that i will simply put the encoded samples from the "mdat" area.SO, if the codecs are predefined then i can study about their header info .If the case is like this how should i proceed....Please tell me some suggestions.......

Thanks & Regards
Gomathi.

  ----- Original Message ----- 
  From: Dickson Liang 
  To: Gomathi R 
  Sent: Tuesday, October 10, 2006 9:10 PM
  Subject: Re: [Mp4-tech] Fw: Regarding codecs supported by Mp4 file format


  Hi,

  MP4 is a file container. So in theory and in practical, you can put almost any kinds of MPEG-related codec inside this format. For example, you can put MPEG2 layer2 audio and MPEG4 H264 video into the same MP4 file. Just like a bag -- you can put any codec you like into the MP4 container.

  Regards,

  Dickson Liang

  Gomathi R <rgomathi sarayusoftech.com> wrote:

    ----- Original Message ----- 
    From: Gomathi R 
    To: mp4-tech lists.mpegif.org 
    Sent: Tuesday, October 10, 2006 12:33 PM
    Subject: Regarding codecs supported by Mp4 file format


    Hi all...
    I'm new to this group and this mail is regarding codecs supported by mp4 file format.
    I've reffered ISO/IEC 14496-part 14(Mp4 - File Format) where they simply mentioned as AudioSampleEntry,VideoSampleEntry...but i want the actual codecs supported from standard reference......

    Please help me out...

    Thanks in Advance

    Please reply ASAP......


    Cheers,
    Gomathi.
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