How do I use AC3 codec instead of PCM like mplayer -ac hwac3
Norikatsu Shigemura
nork at FreeBSD.org
Sun Nov 2 11:56:53 PST 2008
Hi mav.
On Sun, 02 Nov 2008 20:10:16 +0200
Alexander Motin <mav at FreeBSD.org> wrote:
> > I think that my snd_hda(4) device supports hardware AC3 codec
> > (SEE ALSO: attached dmesg and sysctl messages). But I couldn't
> > mplayer -ac hwac3 dvd:// like following:
> It looks like there is two problems:
> First is yours: your default pcm0/dsp0 device is PCM only, it does not
> supports AC3. Your SPDIF port is pcm1/dsp1. You should specify mplayer
> to use it it you wish to pass AC3 through to the external decoder. Also
> you have AC3 support as part of your video card HDMI port - pcm2/dsp2.
Thanks for your pointed out. I tested -ao oss:/dev/dsp1 and
-ao oss:/dev/dsp2, but not worked. These are same results, So...
> Second is at vchans: it does not support AC3 pass though when "Soft PCM
> volume" is enabled. You can hack this by commenting respective part of
> the hdac_audio_ctl_ossmixer_init(). Also it was reported that with some
> amount of luck it may work even without it is you set pcm and master
> volume on that channel to 100% and your decoder is able to detect
> unmarked AC3 stream.
"Soft PCM volume is enabled." is following?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
:
pcm1: Forcing Soft PCM volume
:
pcm2: Forcing Soft PCM volume
:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I read your hdac_audio_ctl_ossmixer_init(), it looks only
"Forcing" or "Enabling" I can select. Humm... Do I try to
disable it?
--
Norikatsu Shigemura <nork at FreeBSD.org>
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