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

[Gomathi R]

Also now i ve supported
*Mpeg-4 Audio
*Mpeg-4 video
*H264
*Mpeg1/2 Audio layer1,2,3 (in this too i've some doubts...regarding whether i ve to see ObjectTypeIndication or AudioObjectType inside ObjectTypeIndication == 0x40)
*Mpegi/2 video (for this also i ve no idea about how to write the header as i searched a lot but unfortunately i couldn't get any info regarding this)
Apart from this , is there anything remaining........this is all about my doubts....
please clarify me....
Thanks & Regards
Gomathi.
----- Original Message ----- 
From: Gomathi R 
To: mp4-tech lists.mpegif.org 
Sent: Wednesday, October 11, 2023 9:00 AM
Subject: Re: [Mp4-tech] Fw: Regarding codecs supported by Mp4 file format
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, 2023 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, 2023 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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