[mythtv-users] NUV to DVD, at last!

[Cory Papenfuss]

 	Not to pee in your pool, but I've seen dozens of these magic 
scripties come and go through the list.  Since you use ProjectX, I'd be 
inclined to believe that the sync actually is OK for most stuff.  MANY 
folks just use the mpeg demuxing or avidemux2 to separate A/V since it 
works 95% of the time.  During debugging they may never encounter captures 
that have A/V time glitches, so it seems like it works fine.

 	I would like to humbly suggest that the lossless MPEG2->MPEG2 
written into mythtranscode by Geoffrey Hausheer be the preferred method 
for making a recording exportable.  The more testing we get on this, the 
closer we'll be to having simple method to archive to DVD.  Once the 
commercials are cut and A/V sync fixed (including time irregularities 
injectedby the commercial cuts!), burning is trivial:
replex -t DVD cut_fixed_infile.nuv > outfile.mpg
dvdauthor -o dvd outfile.mpg
growisofs -dvd-compat -Z /dev/dvd dvd/

-Cory

On Thu, 4 May 2006, Donn Lee wrote:

> Thanks to the bits of info from this fine list and articles I googled
> on the web, and after much trial and error, I finally have a recipe
> for NUV/ATSC--->DVD that works reliably for me.
>
> I've documented my recipe as a HOWTO in my blog
> (http://mymythtv.blogspot.com). Maybe it will be helpful to others.  I
> know that several helpful folks have posted their recipes and I have
> learned from each of them.  There were some "learnings" that I
> encountered that I did not see elsewhere and I tried to document this
> issues and solutions.
>
> Quick synopsis:
>
> The biggest problem I had was audio/lip sync. This is fixed with
> ProjectX. ProjectX took me a while to get installed & running and I
> documented it on my blog. I have spent hours (days?) trying various
> tools to 'fix' the hdtv .nuv mpeg files, and so far only projectx does
> the corrections automagically. Awesome tool.
>
> PX demuxes & creates two files (from the nuv/atsc hidef files created
> by MythTV): One for video, one for audio. This presented a new
> problem, what tool(s) to use to convert the video file to the DVD
> standard. After much reading, I settled on avidemux2. The next problem
> was that I needed to run avidemux2 on my fast P4 server (because
> encoding takes a lot of cpu), but my fast server is my myth frontend
> and that has a plasma monitor. The plasma monitor does not support the
> high resolutions that PC monitors have, and this is important because
> when you load a HD file in avidemux the window is sometimes so large
> that you can't see all of the controls/buttons! So, I ran avidemux
> remotely via X11 over ssh. To get around a weird error with GTK (used
> by avidemux), I hunted and learned that I needed to run ssh with the
> "-Y" switch. sheesh.
>
> Back to video: Following one of the many guides on avidemux, I
> converted the hdtv mpg video to dvd format. You can also edit out
> commercials in this tool. Then I used mplex to mux the dvd format
> video with the ac3 audio file created by projectx. This .mpg file is
> ready for dvdauthor, and after that it's showtime..
>
> I really wanted to use other recipes I saw, but was forced to use
> projectx due to the typical glitches that will be in most atsc/hdtv
> recordings. If anyone has suggestions on optimizing my steps, please
> post.
>
> I'm now able to free up disk space on my mythtv backend by archiving
> (compressing) to DVD. Audio sync is perfect and video quality is very
> good for the archiving I need. Thanks to the discussions here, I would
> not have been inspired to climb this mountain.
>
> I have not tried avidemux in command line mode and would be very
> interested if anyone here does this.
>
> Donn Lee
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

-- 

*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA                                       *
* Electrical Engineering                                                *
* Virginia Polytechnic Institute and State University                   *
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