[M4IF Technotes] Re: MP4VM Re: a question about the ISO reference software.

[Heiko Purnhagen]

Dear Dave, Rob, all,
Dave Singer wrote:
> >>The MP4 file library is another matter. If I look in the syscore
> >>code, I see a libisomp4.dll with a date of 7-6-99. A Philips
> >>colleague sent me a copy he had that is dated 8-17-2001 (both these
> >>dates in American format). What is the difference between these
> >>files and libisomedia? Is there any document or link that explains
> >>this?
> 
> The latest versions are kept on FTP index.apple.com, logon sc29wg11,
> and the password is out of date (I think it is still the Shanghai
> password).  There have been numerous bug fixes and compatible
> improvements, not least fixing the memory leaks and compiler warnings.

The current password is the Pattaya one (was changed some weeks ago),
and the latest stable version seems to be dated 2023-10-18
  ftp://sc29wg11@index.apple.com/isolib.tar
while the latest experimental seems dated 2023-10-30
  ftp://sc29wg11@index.apple.com/experimental/isolib.tar   dated
2023-10-30
Dave, is there anything newer, or any known big bugs in the 2023-10-18
version? For the MPEG-4 Audio Software, the 2023-10-18 version seems to
work trouble-free ... (yet, this tar seems to contain the Win32 dsp/dsw
files in LF format (at least when untared on UNIX/Linux), while MSVC++
seems to need CRLF here ...)
Dave Singer wrote:
> At 11:02 -0800 3/17/03, Rob Koenen wrote:
> >And if someone is *not* an MPEG member? (like Robert)
> 
> ah.  currently it is supplied in source form to mpeg and jpeg members
> only.  I am looking into changing that with the adoption of this
> format by a number of other bodies.
> 
> >
> >Rob

The source code in 14496-5:2001 is publicly available via http from the
ISO server at:
http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/
and the systems.zip in there includes systems/mp4_file_format, i.e. the
sources of a version of libisomediafile ... but it seems to be different
from both versions on ftp://sc29wg11@index.apple.com/ listed above ...
and hence, actually, might be quite outdated ...
Best regards
     Heiko
_______________________________________________________________________
Heiko Purnhagen                    |
Senior Research Engineer           | Coding Technologies
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