[mythtv] More on saa7134 + v4l2

[Calvin Harrigan]

Don't think you are going to get much better than that.
I max out at about 40 MB per second as well.  


On Wed, 2002-11-06 at 19:57, Q wrote:
> FYI:
> 
> # hdparm -t -T -v /dev/hda
> 
> /dev/hda:
>  multcount    = 16 (on)
>  IO_support   =  1 (32-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  1 (on)
>  keepsettings =  1 (on)
>  readonly     =  0 (off)
>  readahead    =  8 (on)
>  geometry     = 9729/255/63, sectors = 156301488, start = 0
>  Timing buffer-cache reads:   128 MB in  0.55 seconds =232.73 MB/sec
>  Timing buffered disk reads:  64 MB in  1.59 seconds = 40.25 MB/sec
> 
> 
> How does this compare to a functional system?
> 
> Seeya...Q
> 
> Isaac Richards wrote:
> 
> >On Wednesday 06 November 2002 08:59 am, Q wrote:
> >  
> >
> >>Here is an update on using v4l2-old + saa7134 with mythtv
> >>
> >>If I use 640x480 the picture is virtually live but it drops 3-5 frames a
> >>second using both rtjpeg or mpeg4  (I have a Duron 1.2 and rtjpeg uses
> >>less than 10%)
> >>
> >>Using 320x240 I get no dropped frames but the picture lags the actual
> >>feed by about 5 seconds.
> >>
> >>I am using todays CVS.
> >>
> >>
> >>Any suggestions are welcome.
> >>    
> >>
> >
> >Most likely, it's harddrive speed.  You might not have DMA turned on, etc.. 
> >Check out the mailing list archives for what other's have done.
> >
> >Isaac
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> >  
> >
> 
> -- 
> Seeya...Q
> 
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