[mythtv-users] dvd respecting cutlist
papenfuss at juneau.me.vt.edu
Thu Aug 12 08:03:16 EDT 2004
> imho, all of the people writing these myth->dvd scripts should get together
> and standardize on things.
I agree completely. I'm somewhat ignorant of nuvexport since for a
variety of reasons I haven't used it. I guess maybe the first step would be to
list what people deem important. Here's a few things that should be
straight-forward and not require too much configuration for a user:
-Video+database "mythtv disc"
Someone mentioned this in the past and I thought it sounded
interesting. Basically, a write disc (CD|DVD) that could contain the bare .nuv
file and a database entry stub that has cutlists, etc. It would be lossless,
although inefficient, and only play correctly on a mythtv box. The nice thing
is that it would be very easy to do, and allow for *SIMPLE* "archive to disc"
functions like a VCR.
I think the existing packages do this well. Chances are most people
would record at higher than SVCD resolution/bitrate even on an ivtv card, so
re-encoding would generally be necessary anyway. Since there's not much room
on an SVCD, there's not much for options on menus/multiple shows, etc. Not as
much of an issue anymore since DVD burners are so cheap.
Here's where it gets interesting. Not everyone has the same desires
for the end result, and it significantly depends on if it's a bttv or ivtv
capture. A few options that seem popular:
-Max quality with ivtv record at dvd-friendly resolution (720x480, 704x480).
This requires GOP-based lossess MPEG cutting. Not very space-efficient since
ivtv cards need fairly high bitrate/resolution to capture quality. Get at
most 2 hours on a DVD with careful planning.
-Med quality with ivtv record. This is what I currently do. Record at medium
quality (640x480), run through denoiser/resizer 2-pass transcoder. Record 4
hours of VHS or higher quality (352x480 at 2.5Mbps). Through extensive resolution
test-pattern sample captures, I've concluded that the ivtv card (pvr-250 oem
that I have anyway) doesn't really capture more than about 400x480 anyway so
recording higher than that is silly. That's 6 1-hour long shows without
commercials. It does require significant processing for the transcode (4hr/hr
on 2 GHz athlon), but the results are pretty good and space-efficient.
Most would probably want to add menus/chapters if there were 6 shows on a
-... what else? I'm running out of steam on this post, so feel free to
contribute to a "wishlist." :)
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