usb/xawtv help needed

[Keith Antoine]

On Sunday 21 April 2002 02:44, you wrote:

Ahh, this is where I am at the moment, so maybe I can return the favour. 
I have been using a pinnacle Rave pro and started with Streamer that 
comes with Xawtv, rapidly gave this the flick as its VERY limitted and am 
now using the mjpegtools lavrec to record, far more flexible. BTW the 
linuxvideoStudio that I am in troublw with is gui for mjpegtools. Most of the 
software defaults to an assumption that you have a mjpeg card, so I have to tell it :

lavrec -f a -n 40 -i t -g 352x288 -q 80 -s  -l 80 -R l --software-encoding /backup/movies/test.avi

Withe the tools one can also tell it to record from line in, iT tells it to look for tuner input.
I got mine working for the first time properly last night with the above script. 
No dropped frames and clean audio.

So what software are you using for capture, there are many out there and 
over the past 4 months I have used most of them., even mainactor will do
a good capture. There is another bttv style prog for cards too called Taztv 
which might do the camera too. I believe that most capture software will 
work with cameras if they follow the bttv std.

When I have finished and can capture from a gui and then edit and 
play with the reults, put it down to a cdr and watch it on either computer or DVD player
then I'll be doing a complete SxS, once again.

> THe 2nd is that xawtv refuses to obey the resolution parameter that i'm
> feeding it:
> xawtv -geometry 352x288-0+0
> and keeps defaulting back to 128x96 (which looks like crap).  My camera
> is definitely capable of doing 640x480 @16fps, so its not a hardware
> limitation.  I'm seeing this error from xawtv as it defaults to the
> lesser resolution:
> ioctl: VIDIOCMCAPTURE(0,fmt=7,size=128x96): Invalid argument
>
> Even if i run it without the higher resolution , the same error appears.
>
> And the final error is occuring whenver i try to take a snapshot with
> the camera:
> JPEG parameter struct mismatch: library thinks size is 372, caller
> expects 376
>
> My research seems to indicate that this is a bug in an older version of
> libjpeg (like version 6a).  However, i've got libjpeg-6b-18 which is
> basically the newest stable release, so i'm stumped.


-- 
Keith Antoine (GANDALF) aka 'skippy'
18 Arkana St, The Gap, Queensland 4061 Australia PH:61733002161
Retired Geriatric, Sometime Electronics Engineer, Knowall, Brain in storage