[mythtv-users] NUV TO WINDOWS PC

Raphael Pooser rpooser at gmail.com
Tue Nov 8 14:06:22 EST 2005

So, there is the built in software transcoder in myth, and you can use 
that to transcode to mpeg4.  Once you do that, the files are named still 
with extension .nuv.  Can you open and play those in windows media 
player (or any other player for windows like ati fileplayer for 
example)?  In your example you changed the extension to .avi but 
otherwise it looks to do about that same as if you used the transcoder 
in myth, except that you are tailoring the files to be much smaller for 
your own purposes.

Scott Alfter wrote:

>Martin Hartman III wrote:
>>From day one I wanted to be able to download shows from my MythTV box, 
>>convert them, and burn to DVD.  I am a life long Windows user and did
>>not think this was possible to go from .nuv to something Windows could
>>understand.  I read how you had to use nuvexport or nuv2avi.  Well, I am
>>here to tell you that this is not at all necessary.  For all you Windows
>>users out there, all you have to do is download the .nuv file through a
>>Samba mount on your MythTV box and rename the extension to .mpg and it
>>will work perfectly.
>As others have no doubt already pointed out, that only works if your MythTV
>recordings are MPEG-2 (which means you're most likely doing hardware encoding).
> That said, you can transcode your video (whether captured with hardware or
>software encoding) with mplayer into a smaller AVI that your Windows machines
>can play.  You can even get watchable video at a low-enough bitrate that it's
>feasible to download the transcoded video from your server at home to a remote
>location (like when you're out of town).
>The following command will transcode foo.nuv to a 768-kbps file with MPEG-4
>video and MP3 audio (line breaks are for clarity):
>mencoder -o foo.avi -ovc lavc \
>                    -lavcopts vcodec=msmpeg4v2:bitrate=704 \
>                    -vop scale=320:240 \
>                    -srate 32000 \
>                    -oac mp3lame \
>                    -lameopts cbr:br=64:mode=3 \
>                    foo.nuv
>The video is scaled to 320x240 and encoded at 704 kbps.  The audio is
>subsampled to 32 kHz and encoded in mono at 64 kbps CBR.
>If your upstream bandwidth is further constrained, you can get watchable
>quality at 256 kbps:
>mencoder -o foo.avi -ovc lavc \
>                    -lavcopts vcodec=msmpeg4v2:bitrate=224 \
>                    -vop scale=240:180 \
>                    -srate 22050 \
>                    -oac mp3lame \
>                    -lameopts cbr:br=32:mode=3 \
>                    foo.nuv
>The video is scaled to 240x180 and encoded at 224 kbps.  The audio is
>subsampled to 22.05 kHz and encoded in mono at 32 kbps CBR.
>In both cases, the resulting files play in Windows Media Player with the codecs
>that come with any system.  You don't need to install any external codecs or
>codec packs to view the transcoded video.  With a cable-modem connection at
>home and broadband of some sort in the hotel (or wherever), I can watch MythTV
>recordings anywhere.  You can even cut the commercials out of the downloaded
>file in just a few minutes with VirtualDub (you'll need to install ffdshow and
>configure it to make its MPEG-4 decoder available to VfW so you can see what
>you're cutting), so you can just kick back and let the show run.
>  _/_
> / v \ Scott Alfter
>(IIGS( http://alfter.us/            Top-posting!
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