RE: [MPEGIF Discuss] mpeg-j question
"Mikael Bourges-Sevenier" <mikael-wah4YrrKVTNWk0Htik3J/[email protected]> Mon, 8 Mar 2004 08:37:02 -0800
| Newsgroups | gmane.comp.video.mpeg4.general |
|---|---|
| Message-ID | <021401c4052b$99befde0$6901a8c0@MdgMerlin> |
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=20
Hello,
I am Vidhya Balasubramanian, a Phd student. I have been =
working on
an MPEG-4 based implementation and I have some questions regarding =
MPEG-J. I
would be glad if you can provide me information regarding this.
1. Using the open source MPEG-J api's at ISO , the mpeg-j stream =
was
only compiled using the bif enc and MUX. Hence the output was a .trif =
file.
Is there a way to directly generate a MP4 file instead of a .trif file. =
I am
not able to figure out how to do this.
[Mika=EBl Bourges-S=E9venier]=20
You should use mp4enc rather than mux. It will write Jar files into the =
mp4
file format.
=20
2. If I use the .bt format and use the MP4 tool at ENST, how do I
include a java stream to the mpeg-4 stream.=20
[Mika=EBl Bourges-S=E9venier]=20
Convert .bt file format to IM1 file format. There are almost the same =
for
the scene description but the object descriptor section is a bit =
different,
see the examples for MPEG-J in Test/MPEG-J directory.
With IM1, you need 2 files: one for the scene description, which would =
be
used by BifsEnc and one file for object descriptor which is used by mux =
or
mp4enc (these files typically ends with .scr extension). It is in the =
scr
files that you describe MPEG-J stream, see the samples in Test/MPEG-J
directory.
=20
Kind regards,
=20
Mike=20
=20
Thanks a lot
Regards
Vidhya
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<META content=3D"MSHTML 6.00.2800.1400" name=3DGENERATOR>
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DTahoma size=3D2><FONT face=3DArial=20
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<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
<DIV><FONT size=3D2>Hello,</FONT></DIV>
<DIV><FONT =
size=3D2> I am=20
Vidhya Balasubramanian, a Phd student. I have been working on an =
MPEG-4 based=20
implementation and I have some questions regarding MPEG-J. I would be =
glad if=20
you can provide me information regarding this.</FONT></DIV>
<DIV><FONT size=3D2> 1. =
Using the=20
open source MPEG-J api's at ISO , the mpeg-j stream was only =
compiled=20
using the bif enc and MUX. Hence the output was a .trif file. Is there =
a way=20
to directly generate a MP4 file instead of a .trif file. I am not able =
to=20
figure out how to do this.<BR><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>[Mika=EBl =
Bourges-S=E9venier] </FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>You should use mp4enc rather than mux. It will =
write Jar=20
files into the mp4 file format.</FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D154563216-08032004> </SPAN></FONT></DIV>
<DIV><FONT size=3D2> 2. If I use the .bt =
format=20
and use the MP4 tool at ENST, how do I include a java stream to the =
mpeg-4=20
stream. <BR><SPAN class=3D154563216-08032004><FONT face=3DArial=20
color=3D#0000ff>[Mika=EBl =
Bourges-S=E9venier] </FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>Convert .bt file format to IM1 file format. There are =
almost the=20
same for the scene description but the object descriptor section =
is a bit=20
different, see the examples for MPEG-J in Test/MPEG-J=20
directory.</FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>With IM1, you need 2 files: one for the scene =
description, which=20
would be used by BifsEnc and one file for object descriptor which is =
used=20
by mux or mp4enc (these files typically ends with .scr =
extension). It is=20
in the scr files that you describe MPEG-J stream, see the samples =
in=20
Test/MPEG-J directory.</FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D154563216-08032004></SPAN></FONT> </DIV>
<DIV><FONT size=3D2><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>Kind regards,</FONT></SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D154563216-08032004></SPAN></FONT> </DIV>
<DIV><FONT size=3D2><SPAN class=3D154563216-08032004><FONT =
face=3DArial=20
color=3D#0000ff>Mike</FONT> </SPAN></FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Thanks a lot</FONT></DIV>
<DIV><FONT size=3D2>Regards</FONT></DIV>
<DIV><FONT size=3D2>Vidhya</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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