AAC in AVI container, (+ war on extending avi capabilities) |
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AAC in AVI container, (+ war on extending avi capabilities) |
 Nov 13 2003, 09:50
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#1
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Group: Members Posts: 26 Joined: 3-September 03 Member No.: 8658  |
please tell me someone - how can I warp AAC files into AVI container? I can use MP4 but I want to try AVI. Maybe VirtualDubMod can do it? I know it can manage AC3, OGG and MP3.
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Nov 13 2003, 09:52
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#2
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 Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267 |
You need a working AAC ACM codec for that I think. I say working, cause there exists one, but it doesn't really work in it's current shape.
Menno |
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Nov 13 2003, 23:12
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#3
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Matroska developer Group: Members Posts: 922 Joined: 29-September 01 Member No.: 74 |
AAC in AVI is possible in principal, but to be 100% AVI spec compliant it needed to be CBR ( Constant Bitrate ). Of course, maybe the same hack as with VBR MP3 in AVI would work, but then you cant use an ACM codec anymore but have to hardcode AAC support into the AVI writing app, like VirtualdubMod. Cyrius, the main dev of it, has no intention do so he once told me ....
-------------------- Support matroska - the bestest vapourware project ! http://www.matroska.org
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Nov 14 2003, 09:20
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#4
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A/V Moderator Group: Members Posts: 841 Joined: 9-June 03 From: Brisbane, AUS Member No.: 7078 |
QUOTE (ChristianHJW @ Nov 14 2003, 08:12 AM) AAC in AVI is possible in principal, but to be 100% AVI spec compliant it needed to be CBR ( Constant Bitrate ). Of course, maybe the same hack as with VBR MP3 in AVI would work, but then you cant use an ACM codec anymore but have to hardcode AAC support into the AVI writing app, like VirtualdubMod. Cyrius, the main dev of it, has no intention do so he once told me .... And now that we have the beautiful, wonderful, and extensible Matroska, we really don't have much need for it. -------------------- www.sessions.com.au - Sessions Entertainment
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Nov 15 2003, 14:20
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#5
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 Group: Members Posts: 487 Joined: 6-April 03 From: Århus, Denmark Member No.: 5861 |
QUOTE (kl33per @ Nov 14 2003, 09:20 AM) And now that we have the beautiful, wonderful, and extensible Matroska, we really don't have much need for it. Or the variation: And now that we have the beautiful, wonderful, and extensible MP4, we really don't have much need for it. You'll even be conforming to an ISO standard  If you don't want to use MPEG-4 or H.263 video, you can try the MOV file format.
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Nov 22 2003, 09:57
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#6
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MPEG4 AAC developer Group: Developer Posts: 398 Joined: 1-June 03 Member No.: 6943 |
Do you need to register with Microsoft if you are going to use AAC within the AVI container? Do you need some kind of Microsoft Development Tool Kits to develope an ACM codec?
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Nov 22 2003, 10:26
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#7
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Neutrino G-RSA developer Group: Developer Posts: 852 Joined: 8-May 02 From: Geneva Member No.: 2002 |
QUOTE (wkwai @ Nov 22 2003, 09:57 AM) Do you need to register with Microsoft if you are going to use AAC within the AVI container? Do you need some kind of Microsoft Development Tool Kits to develope an ACM codec? I guess you'd need Visual C++, an open-source ACM audio codec (LAME's ?), some patience and lots of motivation. About Microsoft: they consider AVI as an obsolete format, and they don't support or help independant developers (because they don't need nor like them). So don't expect much from them. Good luck ! -------------------- Try Leeloo Chat at http://leeloo.webhop.net
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Nov 22 2003, 11:03
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#8
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MPEG4 AAC developer Group: Developer Posts: 398 Joined: 1-June 03 Member No.: 6943 |
Ahhh... I remembered that in my former company.. we had to hire a Master Degree person just to crack the windows 95 AVI driver because there is No documentation by Microsoft.. Something like "Windows 95 Hacked"..
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Nov 23 2003, 00:03
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#9
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Matroska developer Group: Members Posts: 922 Joined: 29-September 01 Member No.: 74 |
QUOTE (NumLOCK @ Nov 22 2003, 09:26 AM) About Microsoft: they consider AVI as an obsolete format, and they don't support or help independant developers (because they don't need nor like them). So don't expect much from them. I just hope nody will really think about making an AAC ACM codec. The Indians have/had a saying i was told : 'Once you recognize you are riding a dead horse, leave it behind and get a new one ...'  .....
-------------------- Support matroska - the bestest vapourware project ! http://www.matroska.org
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Dec 3 2003, 16:46
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#10
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 Group: Members Posts: 83 Joined: 22-May 03 From: Germany Member No.: 6757 |
If AAC has constant frame duration, then the MP3 hack would work, but according to the specs I have, AAC can have variable frame duration...
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Dec 3 2003, 16:50
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#11
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Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267 |
QUOTE (alexnoe @ Dec 3 2003, 04:46 PM) If AAC has constant frame duration, then the MP3 hack would work, but according to the specs I have, AAC can have variable frame duration... It has constant frame duration. The frame duration can only change from file to file, not in a file. Menno |
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Dec 3 2003, 16:55
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#12
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Group: Members Posts: 83 Joined: 22-May 03 From: Germany Member No.: 6757 |
Ah! So it is similar to DTS. I yet want to see a DTS file with variable frame duration
 Then it is possible to hack it into AVI |
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Dec 3 2003, 17:02
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#13
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Matroska developer Group: Members Posts: 922 Joined: 29-September 01 Member No.: 74 |
QUOTE (alexnoe @ Dec 3 2003, 03:55 PM) Then it is possible to hack it into AVI  BEWARE !!!!! If that happens, i immediately quit my job on Vdub Support Forums, sorry Avery Lee  ..... we have enough people coming there asking why this and that doesnt work in Vdub, AAC audio in AVI would certainly be the final thing to make me leave there  !Of course, before alexnoe will kick my ass now, this is not a limitation of AVI, but of the VfW/VCM API and Vdub ....
-------------------- Support matroska - the bestest vapourware project ! http://www.matroska.org
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Dec 3 2003, 17:12
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#14
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 Rarewares admin Group: Members Posts: 7515 Joined: 30-September 01 From: Brazil Member No.: 81 |
Good lord... >_<
-------------------- Get up-to-date binaries of Lame, AAC, Vorbis and much more at RareWares:
http://www.rarewares.org |
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Dec 3 2003, 18:41
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#15
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 Group: Members Posts: 257 Joined: 9-May 02 From: Germany Member No.: 2009 |
why not just use another container before hacking avi?
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Dec 3 2003, 18:43
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#16
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Rarewares admin Group: Members Posts: 7515 Joined: 30-September 01 From: Brazil Member No.: 81 |
Maybe because AVI is the most widely used and supported container... ?
-------------------- Get up-to-date binaries of Lame, AAC, Vorbis and much more at RareWares:
http://www.rarewares.org |
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Dec 3 2003, 18:51
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#17
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Group: Members Posts: 83 Joined: 22-May 03 From: Germany Member No.: 6757 |
Hacking it is fun! That's all! Who would ever have though that you can not only put SSA into AVI, but that even splitting/joining files, even if the styles differ, would work out
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Dec 3 2003, 19:11
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#18
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 A/V Moderator Group: Members Posts: 278 Joined: 22-February 03 Member No.: 5132 |
Hehe, Nic once made a program which put aac into wav so you could mux it into avi, it used to be available on rarewares but I can't find it there anymore. It was called Nic's crappy beta IIRC. It didn't work all that well either.
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Dec 3 2003, 19:17
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#19
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Rarewares admin Group: Members Posts: 7515 Joined: 30-September 01 From: Brazil Member No.: 81 |
QUOTE (Bonzi @ Dec 3 2003, 04:11 PM) Hehe, Nic once made a program which put aac into wav so you could mux it into avi, it used to be available on rarewares but I can't find it there anymore. It was called Nic's crappy beta IIRC. It didn't work all that well either. Well, Nic did that so that AAC could be played on DirectShow. That's the reason of the hackish WAV wrapping. I deleted it because nowadays there are more elegant ways of loading AAC in dshow (wrapping in MP4 or using the AAC parser filter). Also, his directshow filter was based on FAAD1, which is slower and less featureful than faad2 (used in CoreAAC). Regards; Roberto. -------------------- Get up-to-date binaries of Lame, AAC, Vorbis and much more at RareWares:
http://www.rarewares.org |
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Dec 3 2003, 20:24
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#20
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Group: Members Posts: 8 Joined: 27-December 01 Member No.: 774 |
In the other thread I started on this topic Latexxx notes that the AAC parser filter isn't working. Is he correct?
It seems like he might just be missing a filter. |
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Dec 3 2003, 20:30
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#21
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 Group: Members Posts: 252 Joined: 15-May 03 From: Bratislava, SK Member No.: 6640 |
I wonder why Nic named it "crappy beta"
-------------------- Reklama na internete - http://www.consultone.sk
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Dec 3 2003, 20:32
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#22
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 Group: Members Posts: 128 Joined: 19-November 03 From: Québec Member No.: 9923 |
QUOTE (razor1000 @ Dec 3 2003, 02:24 PM) In the other thread I started on this topic Latexxx notes that the AAC parser filter isn't working. Is he correct? It seems like he might just be missing a filter. i have the same result than Latexxx but the AAC parser filter is working for playback -------------------- Worms Armageddon Maps & Schemes : http://sergelac.cjb.cc/maps/maps.htm
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Dec 3 2003, 21:00
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#23
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A/V Moderator Group: Members Posts: 858 Joined: 12-May 03 From: Finland Member No.: 6557 |
The muxing issue isn't aac source filter's fault it is the avi muxer's fault. There just isn't currently any way to mux aac to avi. Just like ChristianHJW earlier said:
QUOTE AAC in AVI is possible in principal, but to be 100% AVI spec compliant it needed to be CBR ( Constant Bitrate ). Of course, maybe the same hack as with VBR MP3 in AVI would work, but then you cant use an ACM codec anymore but have to hardcode AAC support into the AVI writing app, like VirtualdubMod. Cyrius, the main dev of it, has no intention do so he once told me ....
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Dec 6 2003, 20:13
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#24
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Group: Members Posts: 83 Joined: 22-May 03 From: Germany Member No.: 6757 |
There is. I did it a few minutes ago. I just need to try with multichannel AACs now, and have to find a way to read AAC from AVI back (which will be total crap, since it requires to be read binary, like an MP3 stream, but lacks proper stream headers, once the ADTS headers are striped).
If I don't encounter problems, i'll soon release AVI-Mux GUI 1.15.4 with AAC support, for AVI and MKV output Of course, I also need to check if the VBR hack works reliably... This post has been edited by alexnoe: Dec 6 2003, 20:14 |
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Dec 6 2003, 20:27
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#25
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Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267 |
QUOTE (alexnoe @ Dec 6 2003, 08:13 PM) There is. I did it a few minutes ago. I just need to try with multichannel AACs now, and have to find a way to read AAC from AVI back (which will be total crap, since it requires to be read binary, like an MP3 stream, but lacks proper stream headers, once the ADTS headers are striped). When I wrote my ACM AAC codec, I just left the ADTS headers. Solved a lot of problems Menno |
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Lo-Fi Version | Time is now: 19th June 2013 - 14:20 |
