[mythtv] Patch for PowerPC
mythtv at taoyama.com
Tue Mar 23 04:58:27 EST 2004
I do have it working with a seperate PPC system. I definitely would
like to get the patch to fix the frontend. I'll work on making a patch
for the backend.
The CPU usage I'm getting on the 1.25GHz Dual G4 running both the
frontend and backend is around 130% as reported by top. (This is the
sum of both CPUs.)
I have a front end only running on a 450MHz Dual G4 and top is
reporting about 30% usage. The resolution is 640x480 with a 2200
bitrate. The Altivec support seems to help.
On Mar 22, 2004, at 10:59 PM, Gregorio Gervasio, Jr. wrote:
>>>>>> Mino Taoyama writes:
> m> This is my first patch so please let me know if I'm doing anything
> m> wrong.
> m> I've been able to get MythTV working on a PowerMac G4 (Dual 1.25GHz)
> m> running YellowDog Linux 3.0. It required some changes to the
> m> I've included a patch against the 0.14 release.
> It's good to hear that a PPC backend works but I think your
> patch will work only if both the frontend and backend are on PPC
> machines. The nuv file header and frame headers will be byte-swapped
> and padded compared to the regular nuv files created on an x86
> machine. I think the audio stream will also be byte-swapped.
> I have a patch to make a PPC frontend work with an x86
> backend (software encoder). If you are interested, I can send it to
> you. I don't have patches to make a PPC backend work correctly so
> you'll to fix this yourself.
> m> The systems works but CPU usage is very high.
> Just for my interest, how much is the CPU usage and what
> resolution/bitrate are you using? I have a 400MHz G4 and it is not
> quite good enough to decode 480x480 MPEG-4. Does the libavcodec
> Altivec support help much? (I was unable to compile the Altivec
> routines on my Debian system.)
> m> I'm using a WinTV Radio (model 401) card and I had to resort to the
> m> external audio cable into a soundcard since the alsa snd-bt87x
> m> driver wasn't working well.
> Does btaudio work? I think the bttv developer uses PPC
> Gregorio Gervasio, Jr.
> mythtv-dev mailing list
> mythtv-dev at mythtv.org
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