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Date:      Tue, 7 Jan 2003 08:55:26 +0100
From:      Andre Albsmeier <andre.albsmeier@siemens.com>
To:        "Steve O'Hara-Smith" <steve@sohara.org>
Cc:        Andre Albsmeier <andre.albsmeier@siemens.com>, freebsd-multimedia@FreeBSD.ORG
Subject:   Re: FreeBSD 4.7R: no sound when recording with ffmpeg?
Message-ID:  <20030107085526.A14263@curry.mchp.siemens.de>
In-Reply-To: <20030106215821.60130d42.steve@sohara.org>; from steve@sohara.org on Mon, Jan 06, 2003 at 09:58:21PM %2B0100
References:  <20021028202230.1283e8cd.steve@sohara.org> <Pine.BSF.4.21.0210292118440.11617-100000@brain.stagecraft.cx> <20021029194220.7fb532ad.steve@sohara.org> <20030106115851.A12349@curry.mchp.siemens.de> <20030106215821.60130d42.steve@sohara.org>

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On Mon, 06-Jan-2003 at 21:58:21 +0100, Steve O'Hara-Smith wrote:
> On Mon, 6 Jan 2003 11:58:51 +0100
> Andre Albsmeier <andre.albsmeier@siemens.com> wrote:
> 
> AA> for capturing. I also see the problem of the audio being a bit out
> AA> of sync. However, since I re-encode the whole thing using virtualdub
> AA> (shame on me :-)) I simply set the frame rate to 25.045 and all is
> 
> 	I have a few questions - How did you come up with this figure ?

Try and error :-) I noticed that the offset becomes bigger while the
movie plays. 

> What are you playing back with ? What happens if you play back with

I use MPlayer 0.90rc2-2.95.4

> something else ?

Haven't tried yet. However, if you like me to test it I can try
it on some Windoze machine at work.

> 
> AA> I am using the modified grab_bsdbktr.c from your site:
> AA> 
> AA> -rw-r--r--  1 root  wheel  - 6139 Nov 29 18:58 grab_bsdbktr.c
> 
> 	There's a better one up there (since Nov 16 - size is 5896) that has a
> timer fallback to catch missing interrupts as well as the handling for
> processing overruns - in theory it should keep perfect sync under almost
> any conditions (it does for me).

Well, I assume the difference are the trailing ^M's when fetched here
at work using the proxy:

andre@bali:~>ll 2home/grab_bsdbktr.c grab_bsdbktr.c 
-rw-rw----  1 andre  andre  - 5896 Nov 16 19:24 2home/grab_bsdbktr.c
-rw-rw----  1 andre  andre  - 6139 Jan  7 08:44 grab_bsdbktr.c
andre@bali:~>diff -w 2home/grab_bsdbktr.c grab_bsdbktr.c
andre@bali:~>

So I think I already use the most recent one. Just tried it again:
When doing a fetch (via some proxies) here at work, I get this one:

-rw-------  1 andre  wheel  - 6139 Nov 16 19:24 grab_bsdbktr.c

When I do a ftp (or a fetch without proxies) I get this one:

-rw-rw----  1 andre  andre  - 5896 Nov 16 19:24 grab_bsdbktr.c

However, apart from the ^M issue they are the same.

Thanks,

	-Andre

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