mplayer/mencoder with bktr(4) device

Josh Elsasser jre at
Fri Aug 27 06:23:37 PDT 2004

On Fri, Aug 27, 2004 at 01:36:43AM -0400, Damian Gerow wrote:
> I'm new to bktr, and I've got a few questions regarding mplayer/mencoder
> usage with it.  I've got an AverMedia UltraTV PCI 350:
>     bktr0 at pci2:11:0:	class=0x040000 card=0x00031461 chip=0x036e109e rev=0x11 hdr=0x00
>         vendor   = 'Brooktree Corporation'
>         device   = 'Bt878 MediaStream Controller'
>         class    = multimedia
>         subclass = video
>     none0 at pci2:11:1:	class=0x048000 card=0x00031461 chip=0x0878109e rev=0x11 hdr=0x00
>         vendor   = 'Brooktree Corporation'
>         device   = 'Bt878/Fusion878A Video Capture (Audio Section)'
>         class    = multimedia
> I've got RCA in working just fine with mplayer, and both RCA and S-Video in
> working with fxtv.  But I'm having some quality issues with the
> de-interlacing of the S-Video input with mplayer -- can anyone give me some
> pointers?  I've tried various -vf's (hqdn3d, lavcdeint, pp, and pullup seem
> to be the best), but the picture is never quite as good as it is with fxtv.
> And there's a noticable difference between RCA and S-Video (on fxtv), so I'd
> like to get the latter working properly.
> Secondly, how does one encode the audio with mencoder?  If I'm looking at
> the above correctly, there's no support for the audio portion of this chip?
> But it looks like, in fxtv, if I leave the audio set to 'Auto' (as opposed
> to 'Internal'), I get two audio feeds...?
> Any pointers or suggestions are welcome...
>   - Damian

What version of freebsd are you using?  There was a tuning bug in the
bktr driver that was fixed in -current a couple of months ago, but was
only recently merged into -stable.  I have a patch for mplayer 0.92
that works around it, but I doubt it will apply cleanly to the version
currently in ports.


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