new opensource MP4 project: bento4

bond · 15th October 2005, 12:39

Quote:

Portable C++ Class Library for parsing and creating ISO MP4 (ISO 14496-12) multimedia files containing MPEG-4 or other types of multimedia streams, such as iTunes .mp4 or other quicktime files.

Sharktooth · 15th October 2005, 20:04

binaries (VS2003): http://www.webalice.it/f.corriga/bento4/bento4-0.6.rar

bond · 16th October 2005, 14:36

thx sharktooth!

Elias · 27th October 2005, 17:27

Quote:

Portable C++ Class Library for parsing and creating ISO MP4 (ISO 14496-12) multimedia files containing MPEG-4 or other types of multimedia streams, such as iTunes .mp4 or other quicktime files.

What's the difference between MPEG-4 Part 12 and Part 14? Does bento4 parse both?

unskinnyboy · 27th October 2005, 17:51

Part 12 is ISO Base Media File Format (ISO/IEC 14496-12) and is for storing media content. Part 14 (ISO/IEC 14496-14) is the .mp4 container and is derived from Part 12. Probably bento4 works with both.

Elias · 27th October 2005, 17:57

Quote:

Part 12 is ISO Base Media File Format (ISO/IEC 14496-12) and is for storing media content.

Isn't that what mp4 is doing already? What kind of container abbreviation does Part 12 have?

Drachir · 27th October 2005, 19:50

Quote:

Originally Posted by Elias

What's the difference between MPEG-4 Part 12 and Part 14? Does bento4 parse both?

I would say: 14496-14 = 14496-12 + BIFS/OD

ISO/IEC 14496-14
ISO/IEC 14496-12

Elias · 27th October 2005, 19:52

Quote:

Originally Posted by Drachir

I would say: 14496-14 = 14496-12 + BIFS/OD

ISO/IEC 14496-14
ISO/IEC 14496-12

So when it comes down to it, MPEG-4 Part 14 is just an ISMA version of Part 12?

Drachir · 27th October 2005, 20:01

ISMA != BIFS/OD

You can download the the ISMA 1.1 specs for free. Take a look at them.

BIFS/OD = Mpeg 4 Systems

Some old Systems sample can be found here:
http://www.comelec.enst.fr/~dufourd/mpeg-4/

Some by IBM:
http://www.alphaworks.ibm.com/tech/tk4mpeg4

And take a look at the GPAC regression test:
http://gpac.sourceforge.net/download...ests-0.2.3.zip

Elias · 27th October 2005, 20:03

Quote:

Originally Posted by Drachir

ISMA != BIFS/OD

You can download the the ISMA 1.1 specs for free. Take a look at them.

BIFS/OD = Mpeg 4 Systems

Some old Systems sample can be found here:
http://www.comelec.enst.fr/~dufourd/mpeg-4/

Some by IBM:
http://www.alphaworks.ibm.com/tech/tk4mpeg4

And take a look at the GPAC regression test:
http://gpac.sourceforge.net/download...ests-0.2.3.zip

Was that a yes or a no?

Drachir · 27th October 2005, 20:07

It was a NO.

ISMA define profiles, bitrate, resolution ... and includes a basic scene (BIFS track) OD to be compatible with Mpeg 4 Systems Players.

bond · 27th October 2005, 23:20

the iso base file format is the base for lots of file formats: 3gp, jpeg2000 and also part14 mp4 (asp, aac), part15 mp4 (avc)

and you can also have mp4 without bifs/od, so part14 does not require bifs/od (which itself is defined in part1)

Elias · 31st October 2005, 13:32

Can bento4 be used in VirtualDub (for parsing and creating mp4 files)? Or VirtualDubMod (I know that development is dead)? Gabest said that bento4 was easy to understand when adding it in MPC.

bond · 31st October 2005, 13:36

Quote:

Originally Posted by Elias

Can bento4 be used in VirtualDub (for parsing and creating mp4 files)? Or VirtualDubMod (I know that development is dead)? Gabest said that bento4 was easy to understand when adding it in MPC.

why not? you just have to find a dev that codes it

Elias · 31st October 2005, 13:57

Quote:

Originally Posted by bond

why not? you just have to find a dev that codes it

Well, last time I asked Avery Lee, he wasn't exactly up to it (not opposed to it either, but had higher priorities). But with bento4 it shouldn't be difficult I guess. Especially now that Gabest added some nice updates to the source code (ttxt, tx3g, etc).

I suppose that IF Avery would add mp4 reading and writing support to VirtualDub thanks to bento4, more AAC codecs would be released as vfw too?

bond · 31st October 2005, 14:21

i dunno if bento4 has muxing capabilities, gabest only uses the demuxer and these two are two different things obviously

when i look at the bugs of other mp4 muxers, like ffmpeg and videolan, i wouldnt give too much trust into bento4 creating 100% spec compliant stream with all the possible streams (asp, avc, mp3, aac...). well its just a feeling, based on my experience till now

but i do know for sure that mpeg4ip and gpac are able to create correct files, so these libs should have a higher priority for a "mp4 muxing in virtualdub" project

Elias · 31st October 2005, 14:28

Quote:

Portable C++ Class Library for parsing and creating ISO MP4 (ISO 14496-12) multimedia files containing MPEG-4 or other types of multimedia streams, such as iTunes .mp4 or other quicktime files.

Well, that's why I thought it could write mp4 files. But I guess you're right, because bento4 is very new, and perhaps not the best mp4 writer as of now.

bok · 13th November 2005, 23:54

Quote:

Originally Posted by Elias

Well, that's why I thought it could write mp4 files. But I guess you're right, because bento4 is very new, and perhaps not the best mp4 writer as of now.

You're right, Bento4 is still fairly new at this point. We've included some features that we could easily find in other places, but we still need to add support for more "codecs" out of the box. Right now, you can "mux" pretty much anything you want, provided that you know the details of the stream's sample description format. We are planning on including better abstraction APIs for those, to make it easy for people to write as well as read pretty much any type of MP4 file.

We'd like to hear from potential users of the library what they think is the most important at this point.

-- The Bento4 guys

Elias · 14th November 2005, 01:17

@bok: have you checked the changes Gabest made with his bento4 source code in MPC? He added some neat features for ttxt and so on.

bond · 14th November 2005, 13:10

Quote:

Originally Posted by bok

You're right, Bento4 is still fairly new at this point. We've included some features that we could easily find in other places, but we still need to add support for more "codecs" out of the box. Right now, you can "mux" pretty much anything you want, provided that you know the details of the stream's sample description format. We are planning on including better abstraction APIs for those, to make it easy for people to write as well as read pretty much any type of MP4 file.

is there any bento4 cmdl muxer tool available? something like mp4creator from mpeg4ip or mp4box from gpac?

btw plz dont give your tools the same names other existing mp4 tools already use (eg mp4info), cause this can become pretty messy

15th October 2005, 20:04	#2 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 10,818	binaries (VS2003): http://www.webalice.it/f.corriga/bento4/bento4-0.6.rar __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

16th October 2005, 14:36	#3 \| Link
bond Moderator Join Date: Nov 2001 Posts: 9,780	thx sharktooth! __________________ Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ \| AVC/H.264 FAQ \| AAC FAQ \| MP4 FAQ \| MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora \| Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free

27th October 2005, 17:51	#5 \| Link
unskinnyboy Registered User Join Date: Feb 2004 Location: NTSC R1 Posts: 2,054	Part 12 is ISO Base Media File Format (ISO/IEC 14496-12) and is for storing media content. Part 14 (ISO/IEC 14496-14) is the .mp4 container and is derived from Part 12. Probably bento4 works with both. __________________ I encode, therefore I am. Doom9 Toolbar Extension for Firefox [v3.1]

27th October 2005, 20:01	#9 \| Link
Drachir Teetrinker Join Date: Jan 2002 Posts: 256	ISMA != BIFS/OD You can download the the ISMA 1.1 specs for free. Take a look at them. BIFS/OD = Mpeg 4 Systems Some old Systems sample can be found here: http://www.comelec.enst.fr/~dufourd/mpeg-4/ Some by IBM: http://www.alphaworks.ibm.com/tech/tk4mpeg4 And take a look at the GPAC regression test: http://gpac.sourceforge.net/download...ests-0.2.3.zip __________________ Play GO ( http://en.wikipedia.org/wiki/Go_(board_game))

27th October 2005, 20:07	#11 \| Link
Drachir Teetrinker Join Date: Jan 2002 Posts: 256	It was a NO. ISMA define profiles, bitrate, resolution ... and includes a basic scene (BIFS track) OD to be compatible with Mpeg 4 Systems Players. __________________ Play GO ( http://en.wikipedia.org/wiki/Go_(board_game))

27th October 2005, 23:20	#12 \| Link
bond Moderator Join Date: Nov 2001 Posts: 9,780	the iso base file format is the base for lots of file formats: 3gp, jpeg2000 and also part14 mp4 (asp, aac), part15 mp4 (avc) and you can also have mp4 without bifs/od, so part14 does not require bifs/od (which itself is defined in part1) __________________ Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ \| AVC/H.264 FAQ \| AAC FAQ \| MP4 FAQ \| MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora \| Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free

31st October 2005, 13:32	#13 \| Link
Elias MPEG-4 Crazy Lunatic! Join Date: Dec 2004 Posts: 1,088	Can bento4 be used in VirtualDub (for parsing and creating mp4 files)? Or VirtualDubMod (I know that development is dead)? Gabest said that bento4 was easy to understand when adding it in MPC.

31st October 2005, 14:21	#16 \| Link
bond Moderator Join Date: Nov 2001 Posts: 9,780	i dunno if bento4 has muxing capabilities, gabest only uses the demuxer and these two are two different things obviously when i look at the bugs of other mp4 muxers, like ffmpeg and videolan, i wouldnt give too much trust into bento4 creating 100% spec compliant stream with all the possible streams (asp, avc, mp3, aac...). well its just a feeling, based on my experience till now but i do know for sure that mpeg4ip and gpac are able to create correct files, so these libs should have a higher priority for a "mp4 muxing in virtualdub" project __________________ Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ \| AVC/H.264 FAQ \| AAC FAQ \| MP4 FAQ \| MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora \| Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free

14th November 2005, 01:17	#19 \| Link
Elias MPEG-4 Crazy Lunatic! Join Date: Dec 2004 Posts: 1,088	@bok: have you checked the changes Gabest made with his bento4 source code in MPC? He added some neat features for ttxt and so on.

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