[ivtv-users] Perf issues with the ivtvfb driver

[ps1]

Sander Sweers a écrit :
>> On Thu, Oct 30, 2008 at 23:08, ps1 <ps1 at schirrms.net> wrote:
>>  
>>> I'm really puzzled, because this card was in use in my first HTPC, 
>>> witch
>>> was running with an athlon XP processor underclocked at 600 Mhz and
>>> video were running smoothly. At this time, I wasn't able to configure
>>> the system in native directfb, so I used an X11 layer in between ! I
>>> think that this was with a 2.6.14 or 17 kernel, at this time I had to
>>> compile the drivers.
>>>     
>>
>> The xdriver provides accelerated xvideo and it sound like you do not
>> have it installed and/or configured properly.Or you might just not be
>> using the proper maplyer command. When using the xdriver you will need
>> to pass it -vo xv to make use of it.
>>   
> That was the trick !
>
> I'm so sorry for the buzz...
> In fact, as I read everywhere that "all ivtv drivers are now in the 
> kernel", I didn't understand that the ivtv X11 driver is still needed :-(
>
> I think a big warning about the fact that *this* driver is still not 
> part of the distro will not be too much !
>>> BTW, I configured the xorg.conf file directly like the sample in the
>>> ivtv wiki, was very easy and helpful, thanks ! I just had to change the
>>> name of the driver from ivtv to fbdev
>>>     
>>
>> Ah, yes it changed name. If someone does not beat me to it I will
>> update the wiki next week
>>
>>   
> No no !!! Don't update ! Just write that the ivtv X driver is mearly 
> mandatory,even on latest kernel ! (I think that most people installing 
> a TV on a PVR-350 out want to play videos ;-)
>
>>> Last question, not really related ! Is it possible, with the ivtvfb
>>> driver loaded, to use the audio output of the card ?
>>>     
>>
>> *If* you use the mpeg decoder then yes it will also put audio out. The
>> xdriver will not output audio as it is not using the decoder chip but
>> uses the framebuffer directly bypassing the decoder.
>>
>>   
> OK, I had added a spare sound card in the system anyway. I see the 
> next step then !
>> Greets
>> Sander
>>   
> Many, many thanks !
>
> I'm so happy, running the same video with 30 % cpu usage (under X, 
> because I suppose that I cannot use the ivtv X driver with a 
> framebuffer mode !)
>
> Thanks again,
> Pascal
>