Re: problems with streamer / AVI files

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Hi Scott,

On Fri, 1999-01-01 at 10:52, Scott T. Bowden wrote:
> I can understand that, but a question: do you know when you might actually
> get around to putting this in? This just seems like kind of a big thing,
> seeing as one of the major uses for bttv devices is (IME) the recording of
> television shows, and this 2GB limit puts a serious damper on this.

After the 1.6.0 release. mjpegtools-1.6.0 could be released at any
moment now, so it could be pretty soon. (But then, we need to test,
release a new version, so seeing support for >2 GB files in a new
released version might take a few months.)

> I tried out lavrec, and it seems to have a tendency to cause my system to
> hang. If I run it at root (so that it can set negative priorities on its
> threads), it eventually causes my system to lock up (this is while I am
> using X on the same system, and I haven't tested if this happens when I'm
> not using X).

We've heard more of such problems, most people where using nvidia.com's
binary drivers. Odd interaction ;-)... I've tested with the newest
binary drivers and X 4.2.0 and experienced no problem. Submit a bug
report, please ;-).

> I tried running it as a non-root user, and it seemed to work fine,
> although I did have to increase the buffer size. However, after running
> it, I tried to go into X (I had just rebooted, and lavrec was the only
> thing running), and I got a kernel panic. I can only assume that lavrec
> was the culprit, as it is the only "new" thing I was running at the time,
> and it did cause my system to hang on 5 occasions while running as root.

It sounds really odd to me. I can just say: try the newest kernel,
newest BTTV driver, newest mjpegtools beta release (or latest CVS). Try
to run it (without nvidia.com's binary drivers or similar things) and
submit a bug report to our mailinglist (don't forget to mention your
hardware configuration).

> On top of this, the files that I recorded with lavrec generate a lot of
> warnings and errors when I run them through mencoder (which I've been
> using to do divx4 encoding of the avis). So, I'm kind of back to square 1.
> I can use lavrec, but it seriously  destabilizes my system, and outputs
> problematic files (apparently). Or, I can use  streamer, which is limited
> to 2GB recordings. Any other options out there?

As far as I know, you're supposed to run mjpegtools' AVI decoder
(lav2yuv/lav2wav), which outputs raw YUV (video) and WAV (audio) data.
This can be fed into mencoder to create divx4 files. There's also
lav2divx, which is mjpegtools' own divx-encoder (based on avifile).

Ronald

-- 
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-   /V\    | Ronald Bultje <rbultje@xxxxxxxxxxxxxxxxxxx>
-  // \\   | Running: Linux 2.4.18-XFS and OpenBSD 3.0
- /(   )\  | http://ronald.bitfreak.net/
-  ^^-^^





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