[mythtv-users] Broadcom CrystalHD??

Ben Eisemann ben at locojeeper.com
Wed Jan 6 15:52:41 UTC 2010

Thanks Travis for the quick response.

The other shows I haven't noticed an issue with... and the only reason I
noticed this one is that my wife has been on a Bones kick recently.

Its not a huge bother, but i'll look into at some point.   I understand the
CPU usage, memory, network traffic analysis process... but only have a
cursory knowledge of bitrates and codes and all that jive.

Thanks again.

God Bless,

Ben T. Eisemann
beisemann at gmail.com

Faith means trusting in advance what will only make sense in reverse. -
Philip Yancey

On Wed, Jan 6, 2010 at 10:43 AM, Travis Tabbal <travis at tabbal.net> wrote:

> On Wed, Jan 6, 2010 at 6:27 AM, Ben Eisemann <ben at locojeeper.com> wrote:
>> So i'm too impatient to let the discussion naturally drift to what I have
>> on my mind.
>> I currently run a Mac Mini Dual Core 1.83ghz with Mac OS 10.6 and MythTV
>> 0.22 (from sniderpad) as my frontend.  I most recently noticed a little
>> "jerkiness" playing back Bones episodes from Fox HD (clear QAM through
>> comcast, so I guess thats 720p... I'm not sure though).
>> Anywho enough background... I was contemplating eventually trading up to
>> NVIDIA based Mac Mini and running linux on it to the VDPAU whatever it is.
>> But with drivers now available for the broadcom chip on Mac OS... what's
>> the missing ingredient to get it working through the mac variant of the
>> MythTV frontend?  Is there a whole 'nother level of code that needs to be
>> integrated into MythTV source in order to take advantage of the chipset and
>> OS drivers?
> You need Myth to support sending the data to the Broadcom card and reading
> the decoded frames back, then sending them to the video card. So yes,
> another layer of software is required. It's possible support will make the
> cut for .23, and I'm sure there will be a patch set available when the code
> is ready for whatever version of Myth is current at that time. Though doing
> that voids whatever warranty you might have with Myth. :) Much the same as
> what happened with VDPAU and .21.
> The nice thing about this card, is that the API is supposed to be the same
> on all platforms, so once Myth supports it, it should work on Windows,
> Linux, and MacOS.
> As for the jerkiness, do you know anything else about the video? I can
> decode 720p MPEG2 ATSC streams in software with less CPU than that. I'm not
> sure, but I thought Comcast was doing passthrough for OTA stations, so it
> should be about the same. Perhaps they are compressing it themselves with
> h264, that does stress a CPU of that level. To find the problem, you need to
> know how much CPU is in use, and what codec, bitrate, etc. for the video
> file.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mythtv.org/pipermail/mythtv-users/attachments/20100106/5ae27583/attachment.htm>

More information about the mythtv-users mailing list