[mythtv-users] Cannot watch live television with budget tv-tuner
Michael J. Lynch
mlynch at gcom.com
Fri Dec 17 15:56:23 UTC 2004
Kevin Kuphal wrote:
> Matt Vollmar wrote:
>> Kevin Kuphal wrote:
>>> Søren Pingel Dalsgaard wrote:
>>>> I found an old Medion MD5044 tv-tuner card which I popped into my
>>>> mythtv as the only tuner card. I used xawtv to find the
>>>> "frequencies" and configured mythtv accordingly. Watching tv with
>>>> mythtv works (as it "it shows the right picture") but it stall all
>>>> the time and get further and further behind.
>>>> My system is an (old) AMD Athlon 1.1GHz machine with 1MB memory and
>>>> a brand new (fast?) 250Gb harddisk.
>>>> I've ordered my pvr 350 but would like to get a feeling of whether
>>>> I should ditch my old tuner card or leave it in.
>>>> Needless to say, it works just perfect with xawtv which doesn't
>>>> write everything to disk first.
>>> The default recording resolutions and bitrates for MythTV are a bit
>>> high. Try lowering the resolution to something like 352x480 and
>>> record using MPEG-4 at a bitrate of 2200 (1 GB / hr). You should
>>> find that it works much better and then tweak the LiveTV
>>> bitrates/quality options up from there if it works. You will also
>>> find that if you don't watch something while recording you can use
>>> higher bitrates for recorded shows using maybe the High Quality
>>> profile since the system will not be playing back at the same time.
>> Somehow I doubt this will work so well even with a lower resolution.
>> I have a Celeron 2.4 GHz and it barely copes with Live TV at the
>> settings you list. If it DOES work, then I have some other problem.
>> I hashed through this pretty thoroughly on the list 2-3 months ago.
> That's basically my point. By default MythTV uses much higher
> bitrates and settings that a lower end system can handle from a
> recording standpoint. The best practice is to lower the settings to
> what works and then tweak back up to the best that can be done with
> the given hardware.
I use a P3 733 system and to watch "LiveTV" I had to lower the resolution, switch to RTJPEG, lower the bitrate, and switch to
uncompressed audio. Start with uncompressed audio, then lower
your RJTPEG quality a bit. After that adjust your resolution down
until you have some CPU idle time. Then you can tweak any of them
you want. I takes a while to get a combination that still gives
reasonable quality but with patience it can be done.
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