[mythtv] Separating CAPTUR and Capture in OSS

Robert Cantu robert at artistictech.net
Tue Mar 4 21:39:01 EST 2003


I know that most of you are running Debian or SuSE, but RedHat does not come
with alsa so you have to either 1) build from source or 2) get
kernel-version locked prebuilt packages (these usually don't cover modules
built against the newest RedHat up2date kernels). Please no flames about RH.

Robert Cantu, RHCE

-----Original Message-----
From: mythtv-dev-bounces at snowman.net
[mailto:mythtv-dev-bounces at snowman.net]On Behalf Of Matt Zimmerman
Sent: Tuesday, March 04, 2003 8:37 PM
To: Development of mythtv
Subject: Re: [mythtv] Separating CAPTUR and Capture in OSS


On Tue, Mar 04, 2003 at 07:46:04PM -0600, Robert Cantu wrote:

> I run mythtv with the stock emu10k1 on RedHat 8.0 with my SB Live! PCI
> card.  I've also tried it with Alsa from source. I can honestly say that
> the OSS driver is much better. With alsa, I get horrible audio performance
> when I fast forward or rewind recorded or live TV. That and it's just
> cleaner not to have 10+ modules that you have to hand load in most cases
> (modprobe snd-emu10k1 doesn't load the oss-pcm or oss-mixer modules), not
> to mention that you have to handle the case of automatically muted Master
> and PCM channels in the mixer everytime you load the drivers. For RedHat,
> I find that alsa just gets in the way (it handles the OSS mixer load/save
> already after an install) for performance that is either negligible or
> non-existent for 98% of cases needed. I'm not saying it's not a good
> project, I'm just saying that MythTv (and it's developers) shouldn't force
> alsa on the user if the oss driver performs the same or better (as it does
> in the case of emu10k1).

If you would use your vendor's ALSA packages, the administration problems
that you have would go away.  They take care of loading the modules
properly, saving and restoring mixer settings, etc.  Thee are not inherent
problems with ALSA.

--
 - mdz
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