[Gllug] Digital video

[Dave Cridland]

Don't, loosely speaking. :-)

1) Use modprobe, not insmod - modprobe is a wrapper for insmod that'll
do intelligent things. For instance, you should be able to just
'modprobe raw1394'.

2) If you're on a 2.4.x system, consider using devfs and devfsd - then
modules will load extremely well on the fly, better than just using
kmod. What'll happen is that devfsd will autoload modules when you even
look at a particular file in /dev - this is rather handy.

On 09 Jul 2001 12:30:46 +0100, Paul Brazier wrote:
> I've got a bit further with this over the weekend:
> Firstly, an easy question for someone I'm sure: 
> 
> How do I get kernel modules to automatically load at boot? I've been
> manually typing 
> insmod ieee1394
> insmod ohci1394
> insmod raw1394
> I've looked at /etc/modules.conf (or is it /etc/conf.modules?) but I'm
> unsure of the syntax.
> 
> I've had problems with the video file formats.
> If anyone's interested here's what I've found (please correct me if I'm
> wrong):
> The .avi (audio-video interleave) format, invented I think by Microsoft,
> is in fact a kind of "wrapper" format that lumps together audio and
> video, but the actual compression used for the video or audio components
> could be anything.
> The digital video cameras uses their own hardware compression "dv1" or
> "dv2".
> Most other .avi's you find use something else like CinePak, Sorenson,
> etc.
> 
> Windows media player manages to play the DV-compressed .avi's, I think
> because it has a "DVSoft" codec (compression-decompression) installed
> that decompresses in software what the camera does in hardware.
> Quicktime can play most .avi's but not DV ones.
> 
> The video player I couldn't remember is xanim, the version I had
> wouldn't play DV .avi's.
> 
> gscanbus is a useful gtk application for testing your firewire/ieee1394
> network is working OK.
> 
> dvgrab is a commandline tool for grabbing digital video in either dv1,
> dv2 or "raw" (I asume this is uncompressed?) formats. No fancy front end
> but works fine.
> 
> Kino (mentioned below) plays *only* DV-compressed .avi's. I couldn't get
> the latest version (0.4) to compile so I was using an older rpm and
> couldn't seem to grab DV using this. It's a fairly basic player.
> 
> Broadcast 2000 looks very good, it has lots of functionality for video
> editing. mp3 music files load OK and you can apply loads of effects. It
> doesn't like .avi's though - it seems to work mainly using Quicktime
> .mov format. Grabbing video from a DV camera I couldn't get to work.
> I'll persevere though because it looks very promising if I can get the
> video files open in the first place.
> 
> -----Original Message-----
> From: robin.c.smith at bt.com 
> Sent: 06 July 2001 13:04
> To: bt.com.robin.c.smith; linux.co.uk;.gllug
> Subject: RE: [Gllug] Digital video
> 
> 
> You're slightly further down this route than me ( just about to install
> the
> firewire card ). There is an editor called Kino that you can get from
> the
> same place as dvgrab http://www.schirmacher.de/arne/dvgrab/index_e.html
> 
> Robin
> 
> -----Original Message-----
> From: Paul Brazier [mailto:pbrazier at cosmos-uk.co.uk]
> Sent: 06 July 2001 12:58
> To: Gllug (E-mail)
> Subject: [Gllug] Digital video
> 
> 
> Does anyone have any experience of digital video import/editing under
> Linux?
> 
> I've managed to get a DV camera and firewire card working under Linux
> (Mandrake 8.0, 2.4.3 kernel) to the extent of grabbing video to disk
> (using gscanbus, dvgrab, libraw1394) which I can then view in Win98.
> 
> Can anyone recommend any video viewers/editors/tools?
> In particular I'm sure I used to have a lightweight X program that
> played .avi's but I can't remember the name.
> 
> --
> Paul Brazier
> Cosmos UK 
> 
> 
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