[mythtv] Re: Recording Process

Erik Arendse erik_nospam.arendse at bigfoot.com
Fri Jan 31 09:18:24 EST 2003

At 31-1-03 00:06, Michael Cook wrote:
> >It hasn't been discussed much because the network equipment and
> >resources required to do this makes it impossible or wasteful even for
> >modern systems.
>So I thought it could record them, and at night the files would be moved
>to another computer (with more power) which would compress them better
>(maybe MP4) and then they would get moved back over to the MythTV box.

Have you done your math for even small resolutions uncompressed?
Take 320x240, 24bit, 30 frames per second for NTSC, 3600 seconds per hour = 
23 GigaByte per hour.
Multiply that by 4 if you want 640x480. I for myself would spend the money 
for a few hour harddisk on a faster CPU...
Or buy a longer antenna cable and put your TV card in the faster machine :-)

Second problem is your harddisk bandwidth, if your system can't cope with 
rjpeg can it cope with flushing 23Gb/hour to disk without losing frames?

>I'm just sorta thinking about all this at this point. I agree that this
>would not be easy to code up, etc.

Would be comparatively easy now the split is there, but given my numbers 
above why would anybody use it?


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