Michael T. Dean wrote:
Todd Bowman wrote:
Michael T. Dean wrote:
b) I highly recommend the PVR-x50's (and, personally, wouldn't touch
a frame grabber). If you've got experience with IvyTV, you could
probably get PVR-150 up and running and it's not much more expensive
than "dumb" frame grabbers. If not, there are still some really
good deals on PVR-250MCE's (which are easier to set up).
I've looked at the HW MPEG2 encoders but MPEG2 seems to take up too
much room. I tried using the SW MPEG2 encoding in MythTV and within
one day my 160GB disk was filled. Even though I turned on automatic
transcoding to MPEG4, the recordings just seemed to get ahead of the
transcoding. Once the disk was full, it couldn't transcode any
more. Do the HW encoders produce smaller video files? I don't
remember the exact file size but I think a 2.5 hour program was
something like 26GB! (640x480)
2.5hrs at 26GB would be a 25Mbps bitrate. DVD specification limits
total bitrate (audio, video, and subtitles) to 10.08Mbps and no DVD
has a sustained 10.08Mbps (instead, they would use variable bitrate).
The 10.08Mbps limit on DVD's is appropriate as DVD's have a max
resolution of 720x480, and above this bitrate, you've definitely
crossed the point of diminishing returns. So, this would only happen
with bad recording settings (or, if the 26GB was the transcoded
version, bad transcode settings).
http://mythtv.info/moin.cgi/UserManual_2fTechnicalDetailsAppendix_2fRecordingParameters
My settings are shown on there--720x480 at about 1.15GiB/hr.
Thanks for all of the great information! I guess I'll just spend a
little extra money and get a PVR-250. As a side note, the size of my
2.5hr program turned out to be 51GB. At least I'll be able to record it
again later.
_______________________________________________
mythtv-users mailing list
[email protected]
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
