[mythtv] Compression and Gatos support
Sun, 22 Dec 2002 21:59:19 -0500
On Sun, Dec 22, 2002 at 09:41:47PM -0500, Lego Andy wrote:
> I did. And I actually found several mails from you saying that it
> works for you, but no actual description on how you got it to work.
I explained exactly what is possible and what is not, and I'm fairly certain
that I did not say that capturing using mythtv works for me, because it
doesn't for reasons I have explained in previous emails.
The km capture device is limited in these important ways:
- it requires that a program like avview be running in order to provide the
data to be captured
- you cannot use Xv (hardware scaling) at the same time
- capture cannot use the mmap interface
The second two restrictions could be addressed in software to some extent,
with various tradeoffs, but nobody has done it.
> This is ok, since I use bttv for recording and it seems to be working
> fine. So, this is my experience so far:
> 1. bttv works fine, I can record shows.. Futurama was missing first
> couple of minutes, but my friend informed me that shows tend to
> start couple of minutes earlier. I guess that could be fixed by
> setting system clock. Or maybe mythtv should always record extra
> time if two shows do not overlay.
bttv is an entirely different driver, for bt8x8 capture cards. It has
nothing to do with the AIW card or gatos.
> 2. When I try using AIW (gatos driver km_drv), which registers device
> /dev/video0, I get the following error(?) on console:
> VIDOCGMBUF:: Invalid argument
> VIDIOCSAUDIO: Invalid argument
This will not work, as explained above.