Re: Issue of Mpeg4 Audio (Newbe)
Re: Issue of Mpeg4 Audio (Newbe)
- Subject: Re: Issue of Mpeg4 Audio (Newbe)
- From: Stephen Davis <email@hidden>
- Date: Wed, 6 Jul 2005 01:52:34 -0700
Ranjeet,
I have the issue on the m4a (Mpeg 4 Audio), The basic thing what
I have to do is that I have to read the m4a audio and play back,
The First basic thing I did is that, I copied all the data into the
new file i.e abcd.m4a as the copy_abcd.m4a and then playing the
file into the foobar player, I observaed that the copied file
i.e copy_abcd.m4a is playing fine,
Now what I have to do is I have to play the file by skipping
some amount of the data, (Forward Skipping)
so i skipped some amount of data (Here I skipped in terms of bytes),
and then made the file again names as the skipped_abcd.m4a, Now when
I play this file into the foobar then i see that it says about the
error, that it cannot play,
MPEG-4 files are highly structured so you can't just hand a random
set of bytes from such a file to a decoder and expect it to work.
Again searched for the soulution of this, I came to know that
and read the site, and worked accoreding to it,
http://www.dv.co.yu/mpgscript/mpeghdr.htm
This document describes MPEG-1 audio data. The MPEG-4 file format is
drastically different than this format.
I would suggest looking for ISO document "ISO/IEC 14496-3:2001" and
its siblings and going from there.
stephen
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden