[vlc-devel] Problem playing h264 + AAC (VBR) in AVI container.

jboileau jboileau at gmail.com
Thu Jul 30 21:41:20 CEST 2009 

Hi Kaarlo,

Thanks for doing these tests. I appreciate your help.

You are right that this file is flagged as problematic by VLC. This
file has no index. This does not make it damaged or illegal though. In
AVI the index, although recommended, is not obligatory. VLC, being
friendly, offers to create it for us so that seeking will be possible.
This should not be seen as the cause of the audio failling and I don't
think that is what you implied, just making sure we understand.

Thanks for your investigation. I don't know if there is anything we
can do. Is it possible, through options, to force the audio decoder to
FAAD?

Jacques Boileau




---------- Forwarded message ----------
From: Kaarlo Räihä <agent_007 at luukku.com>
Date: Thu, Jul 30, 2009 at 3:20 PM
Subject: Re: [vlc-devel] Problem playing h264 + AAC (VBR) in AVI container.
To: Mailing list for VLC media player developers <vlc-devel at videolan.org>


I can confirm that the audio doesn't work in VLC. But for me it didn't
work 0.8.6x series either. It does play correctly in MPC.

I assume issue in VLC is that audio track is identified incorrectly
(or the info is wrong). Because it feeds the audio to QuickTime
decoder in Win32, when normally FAAD is used with AAC.

Other notes, AVI files is either damaged or wrongly created one (VLC
complains about this on opening of the file). Tool like Divfix++ can
make it better in AVI spec wise, but audio is still MIA in VLC. Even
fixed AVI won't work in MP4box or in AVIdemux (cannot remux to MP4 nor
demux audio AAC out from the AVI).

jboileau kirjoitti 30.07.2009 kello 17:05:
> Thanks Kaarlo. I just uploaded the file, the link is below. Let me
> know if you find anything.
>
> http://rapidshare.com/files/261777375/test1-0.avi.html
>
> This is the first time I used Rapidshare, seems to be a great way to
> transfer files. Thanks for introducing me to it. :-)
>
> Jacques Boileau
>
>
>
>
> On Thu, Jul 30, 2009 at 3:00 AM, Kaarlo Räihä<agent_007 at luukku.com>
>  wrote:
> > Rapidshare, Megaupload or any similar service will work.
> >
> > jboileau kirjoitti 29.07.2009 kello 21:46:
> >> Hi Kaarlo,
> >>
> >> Thanks very much! for the qwick reply! Where can I upload the file?
> >> Pastebin is for text only, is there the equivalent for binary files? I
> >> doubt attaching à 4.44mb file to this email is a good idea. Let me
> >> know...
> >>
> >> Jacques Boileau
> >>
> >>
> >>
> >>
> >> On Wed, Jul 29, 2009 at 1:49 PM, Kaarlo Räihä<agent_007 at luukku.com>
> >>  wrote:
> >> > You can put AAC inside AVI, but it isn't recommended because there can
> be
> >> some complications on playback side. If you can upload short sample file
> >> showing the issue, I can open trac ticket for this.
> >> >
> >> > jboileau kirjoitti 29.07.2009 kello 19:00:
> >> >> Hi,
> >> >>
> >> >> I have a problem reading h264 + AAC AVI files with VLC. The AAC is
> >> >> VBR. They play very well with VLC 0.8.6i and play perfectly with
> >> >> MPlayer. But with VLC 1.0.1 it fails to play the audio portion. I have
> >> >> included VLC messages below that I believe to be pertinent.
> >> >>
> >> >> These files are created by a surveillance camera and I have some
> >> >> control over the code or at least some parameters of the encoding and
> >> >> maybe something might be configured to help compatibility with VLC. I
> >> >> can't do CBR presently though. Maybe there are VLC options I can try
> >> >> and play with to see if I can get it to work.
> >> >>
> >> >> I have read contradicting information on the web about AAC (VBR) in an
> >> >> AVI. Some say its possible some say not. I hope some of you experts
> >> >> can shed some light on the subject. If more details is needed, please
> >> >> let me know. I can also upload an example file to Pasteboard and/or
> >> >> discuss this on IRC, whichever is easier for you guys.
> >> >>
> >> >> If you have ideas of things to try to make this work I would
> appreciate.
> >> >> Thanks!
> >> >>
> >> >> Jacques Boileau
> >> >>
> >> >>
> >> >> main debug: using decoder module "avcodec"
> >> >> main debug: TIMER module_need() : 5.000 ms - Total 5.000 ms / 1 intvls
> >> >> (Avg 5.000 ms)
> >> >> main debug: thread (decoder) created at priority 0
> >> >> (../.././src/input/decoder.c:315)
> >> >> main debug: thread started
> >> >> main debug: looking for decoder module: 36 candidates
> >> >> main debug: using decoder module "faad"
> >> >> main debug: TIMER module_need() : 1.000 ms - Total 1.000 ms / 1 intvls
> >> >> (Avg 1.000 ms)
> >> >> main debug: looking for packetizer module: 21 candidates
> >> >> packetizer_mpeg4audio debug: running MPEG4 audio packetizer
> >> >> packetizer_mpeg4audio debug: no decoder specific info, must be an ADTS
> >> >> or LOAS stream
> >> >> main debug: using packetizer module "packetizer_mpeg4audio"
> >> >> _______________________________________________
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> >> >
> >> > ...................................................................
> >> > Luukku Plus paketilla pääset eroon tila- ja turvallisuusongelmista.
> >> > Hanki Luukku Plus ja helpotat elämääsi. http://www.mtv3.fi/luukku
> >> > _______________________________________________
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> >
> > ...................................................................
> > Luukku Plus paketilla pääset eroon tila- ja turvallisuusongelmista.
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> >
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...................................................................
Luukku Plus paketilla pääset eroon tila- ja turvallisuusongelmista.
Hanki Luukku Plus ja helpotat elämääsi. http://www.mtv3.fi/luukku
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